York Optiview Remote Control Center 00497Vip Users Manual Form

00497VIP to the manual c0861755-76f6-4fd2-aa30-b88faa77b723

2015-02-02

: York Optiview-Remote-Control-Center-00497Vip-Users-Manual york-optiview-remote-control-center-00497vip-users-manual-455387 york pdf

Open the PDF directly: View PDF .
Page Count: 112 [warning: Documents this large are best viewed by clicking the View PDF Link!]

Form 50.40-OM2 (601)
IMPORTANT! READ BEFORE PROCEEDING! GENERAL SAFETY GUIDELINES injury to persons.
TABLE OF CONTENTS
EU DECLARATION OF CONFORMITY
SECTION 1 – PRODUCT DESCRIPTION
- CHILLER/CONDENSING CONTROL PANEL(S)
SECTION 2 – INSTALLATION
SECTION 3 – OPERATION OPTIVIEW REMOTE CONTROL CENTER
SECTION 4 – PRINTERS
SECTION 5 – SERVICE INTRODUCTION
SECTION 6 – PART NUMBER AND RENEWAL PARTS
SI METRIC CONVERSION

INSTALLATION, OPERATION & SERVICE

OPTIVIEWTM

REMOTE CONTROL CENTER

New Release Form 50.40-OM2 (601)

OPTIVIEW™ REMOTE CONTROL CENTER

00497VIP

YORK INTERNATIONAL2

WARNING indicates a potentially

hazardous situation which, if not

avoided, could result in death or

serious injury.

CAUTION identifies a hazard

which could lead to damage to the

machine, damage to other equip-

ment and/or environmental pollu-

tion. Usually an instruction will

be given, together with a brief

explanation.

DANGER indicates an imminently

hazardous situation which, if not

avoided, will result in death or seri-

ous injury.

IMPORTANT!

READ BEFORE PROCEEDING!

GENERAL SAFETY GUIDELINES

This equipment is a relatively complicated apparatus.

During installation, operation, maintenance or service,

individuals may be exposed to certain components or

conditions including, but not limited to: refrigerants,

oils, materials under pressure, rotating components,

and both high and low voltage. Each of these items

has the potential, if misused or handled improperly,

to cause bodily injury or death. It is the obligation

and responsibility of operating/service personnel to

identify and recognize these inherent hazards, protect

themselves, and proceed safely in completing their

tasks. Failure to comply with any of these requirements

could result in serious damage to the equipment and

the property in which it is situated, as well as severe

personal injury or death to themselves and people

at the site.

This document is intended for use by owner-authorized

operating/service personnel. It is expected that this

individual possesses independent training that will

enable them to perform their assigned tasks properly

and safely. It is essential that, prior to performing

any task on this equipment, this individual shall have

read and understood this document and any referenced

materials. This individual shall also be familiar with and

comply with all applicable governmental standards and

regulations pertaining to the task in question.

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to areas of potential hazard:

NOTE is used to highlight additional

information which may be helpful

to you.

External wiring, unless specied as an optional connection in the manufacturer’s product

line, is not to be connected inside the micro panel cabinet. Devices such as relays, switches,

transducers and controls may not be installed inside the micro panel. No external

wiring is allowed to be run through the micro panel. All wiring must be in accordance

with YORK’s published specications and must be performed only by qualied YORK

personnel. YORK will not be responsible for damages/problems resulting from improper

connections to the controls or application of improper control signals. Failure to follow

this will void the manufacturer’s warranty and cause serious damage to property or

injury to persons.

FORM 50.40-OM2

3YORK INTERNATIONAL

CHANGEABILITY OF THIS DOCUMENT

In complying with YORK’s policy for continuous

product improvement, the information contained in

this document is subject to change without notice.

While YORK makes no commitment to update or

provide current information automatically to the

manual owner, that information, if applicable, can be

obtained by contacting the nearest YORK Applied

Systems Service ofce.

It is the responsibility of operating/service personnel

as to the applicability of these documents to the

equipment in question. If there is any question in

the mind of operating/service personnel as to the

applicability of these documents, then, prior to

working on the equipment, they should verify with

the owner whether the equipment has been modied

and if current literature is available.

YORK INTERNATIONAL4

SECTION 1 PRODUCT DESCRIPTION ....................................................................... 8

Chiller/Condensing Control Panel(s) .......................................................... 9

SECTION 2 INSTALLATION........................................................................................ 10

Mounting .................................................................................................. 10

Installation Checklist ................................................................................ 10

Wiring ................................................................................................... 10

Lan Transient Installation ......................................................................... 14

Eprom Compatibility ................................................................................ 14

Troubleshooting ....................................................................................... 14

Safety ................................................................................................... 14

Proper Installation Practices ..................................................................... 15

SECTION 3 OPERATION............................................................................................. 18

OptiView Remote Control Center ............................................................. 18

Screen Descriptions and Usage................................................................. 19

Home Screen............................................................................................. 22

Unit Screen .......................................................................................... 24

Systems Screen............................................................................... 29

Individual System Screen.......................................................... 32

Hours/Starts Screen ........................................................................ 34

Options Screen ............................................................................... 36

Trending Screen ............................................................................. 38

Trend Setup Screen ................................................................... 40

Setpoints Screen ............................................................................. 44

History Screen ................................................................................ 47

History Details Screen .............................................................. 48

RCC Setpoints Screen ......................................................................... 49

RCC Setup Screen .......................................................................... 50

Comms Screen .......................................................................... 52

Printer Screen ............................................................................ 53

Diagnostics Screen .................................................................... 54

Diagnostics (I/O) Screen ..................................................... 55

Diagnostics (RCC Comms) Screen ..................................... 56

Display Messages ..................................................................................... 58

SECTION 4 PRINTERS ............................................................................................... 59

SECTION 5 SERVICE ................................................................................................. 65

Introduction............................................................................................... 65

TABLE OF CONTENTS

FORM 50.40-OM2

5YORK INTERNATIONAL

System Architecture.................................................................................. 66

Microboard................................................................................................ 68

Microboard Program Jumpers .................................................................. 76

Microboard Program Switches ................................................................. 78

Liquid Crystal Display.............................................................................. 81

Display Interface Board ............................................................................ 87

Display Backlight Inverter Board ............................................................. 89

Keypad .................................................................................................... 91

Power Supply ............................................................................................ 94

Ofine Diagnostics & Troubleshooting.................................................... 96

Main Diagnostics ...................................................................................... 97

Keypad Test............................................................................................... 98

Display Test .............................................................................................. 99

Bit Pattern Test ....................................................................................... 100

Serial Inputs / Outputs Tests ................................................................... 101

Digital Inputs / Outputs Tests ................................................................. 103

Analog Inputs Test .................................................................................. 104

System Commissioning Checklist .......................................................... 105

SECTION 6 PART NUMBER AND RENEWAL PARTS........................................... 106

LIST OF TABLES

TABLE 1 – Required Software Version of the Chiller/Condensing Unit Eproms .......... 11

TABLE 2 – Program Jumpers .........................................................................................76

TABLE 3 – Program Switches ........................................................................................78

TABLE 4 – Part Number ............................................................................................... 106

TABLE 5 – Renewal Parts ............................................................................................106

YORK INTERNATIONAL6

FIG. 1 – EU DECLARATION OF CONFORMITY ............... 7

FIG. 2 – FIELD WIRING ................................................... 12

FIG. 3 – CONTROL INSTALLATION ................................ 16

FIG. 4 – GROUNDING ..................................................... 16

FIG. 5 – SEPARATE CONDUIT INSTALLATION .............. 17

FIG. 6 – POWER & GROUND WIRE CONNECTIONS .... 17

FIG. 7 – OPTIVIEW REMOTE CONTROL CENTER ....... 18

FIG. 8 – SCREEN NAVIGATION LAYOUT ....................... 20

FIG. 9 – HOME SCREEN................................................. 22

FIG. 10 – UNIT SCREEN ................................................... 24

FIG. 11 – SYSTEMS SCREEN .......................................... 29

FIG. 12 – INDIVIDUAL SYSTEM SCREEN........................ 32

FIG. 13 – HOURS AND STARTS SCREEN ....................... 34

FIG. 14 – OPTIONS SCREEN ........................................... 36

FIG. 15 – TRENDING SCREEN......................................... 38

FIG. 16 – TRENDING SETUP SCREEN............................ 40

FIG. 17 – SETPOINTS SCREEN ....................................... 44

FIG. 18 – HISTORY SCREEN............................................ 47

FIG. 19 – HISTORY DETAILS SCREEN ............................ 48

FIG. 20 – RCC SETPOINTS SCREEN .............................. 49

FIG. 21 – RCC SETUP SCREEN....................................... 50

FIG. 22 – COMMS SCREEN.............................................. 52

FIG. 23 – PRINTER SCREEN............................................ 53

FIG. 24 – DIAGNOSTICS SCREEN................................... 54

FIG. 25 – DIAGNOSTICS I/O SCREEN ............................. 55

FIG. 26 – DIAGNOSTICS RCC COMMS SCREEN ........... 56

FIG. 27 – PRINTERS ......................................................... 59

FIG. 28 – EXAMPLE PRINTOUT (OPERATING DATA)...... 63

FIG. 29 – EXAMPLE PRINTOUT (HISTORY HEADER) .... 64

FIG. 30 – CONTROL CENTER BLOCK DIAGRAM ........... 67

FIG. 31 – MICROBOARD ................................................... 73

FIG. 32 – FLASH MEMORY CARD.................................... 74

FIG. 33 – BLOCK DIAGRAM, MICROBOARD .................. 75

FIG. 34 – MICROBOARD LAMP DIMMER CIRCUIT ......... 78

FIG. 35 – SERIAL DATA COMMUNICATIONS PORTS...... 79

FIG. 36 – CONFIGURABLE ANALOG INPUTS ................. 80

FIG. 37 – DISPLAY, MOUNTING........................................ 84

FIG. 38 – LCD TYPICAL CONTROL SIGNAL TIMING ...... 84

FIG. 39 – LG SEMICON LP104V2 DISPLAY ASSEMBLY - 85

FIG. 40 – SHARP LQ10D367 DISPLAY ASSEMBLY - ...... 85

FIG. 41 – SHARP LQ10D367 BACKLIGHT LAMP

REPLACEMENT ................................................ 86

FIG. 42 – LG SEMICON LP104V2 BACKLIGHT LAMP

REPLACEMENT................................................. 86

FIG. 43 – DISPLAY INTERFACE BOARD .......................... 88

FIG. 44 – DISPLAY BACKLIGHT INVERTER BOARD....... 90

FIG. 45 – KEYPAD ............................................................. 92

FIG. 46 – DIAGRAM, KEYPAD........................................... 93

FIG. 47 – BLOCK DIAGRAM, DC POWER DISTRIBUTION. 95

FIG. 48 – MAIN DIAGNOSTIC SCREEN ........................... 97

FIG. 49 – KEYPAD TEST SCREEN ................................... 98

FIG. 50 – DISPLAY TEST SCREEN................................... 99

FIG. 51 – BIT PATTERNS TEST SCREEN....................... 100

FIG. 52 – SERIAL INPUTS/OUTPUTS TESTS SCREEN 101

FIG. 53 – DIGITAL INPUTS/OUTPUTS TESTS SCREEN 103

FIG. 54 – ANALOG INPUTS TEST SCREEN .................. 104

FIG. 55 – FRONT OF OPTIVIEW RCC............................ 107

FIG.56 – INSIDE OF OPTIVIEW RCC ............................ 107

FIG.57 – INSIDE DOOR OF OPTIVIEW RCC ................ 108

FIG.58 – LOCATION OF FUSE, F1 & F2 ........................ 109

LIST OF FIGURES

FORM 50.40-OM2

7YORK INTERNATIONAL

FIG. 1 – EU DECLARATION OF CONFORMITY

YORK INTERNATIONAL8

SECTION 1 – PRODUCT DESCRIPTION

The YORK OptiView Remote Control Center is a

microprocessor based control system capable of

remotely monitoring certain chillers and condensing

units. It can monitor and individually control 1 to 8 of

these chiller/condensing units.

The panel comes congured with a full screen color

LCD Graphic Display mounted in the middle of a

keypad interface. The graphic display allows the

presentation of the current information all at once. In

addition, the operator may view a graphical representa-

tion of several operating parameters. For the novice

user, the locations of various parameters are clearly and

intuitively marked. Instructions for specic operations

are provided on many of the screens.

The graphic display also allows information to be

represented in Imperial units (temperatures in °F and

pressures in PSIG or PSID) or SI units (temperatures in

°C and pressures in BARG or BARD).

All values that are modiable at the Remote Control

Center are recorded in memory and preserved even

through a power failure condition. During operation, the

chillers are continually polled and the user is advised of

the operating conditions by various status and warning

messages. A complete listing of shutdown, status, and

warning messages is within the chiller/condensing

unit’s operation manual.

If the chiller/condensing unit is in remote control mode

the OptiView Remote Control Center provides the

capability to program the following:

1. Start Command

2. Stop Command

3. Local Setpoint

4. Local Control Range

5. Daily/Holiday Schedule

6. Current or Load Limit Setpoint

The Remote Control Center is also designed to enable

the user to obtain chiller/condensing unit printouts

directly from this panel.

This equipment has been tested and

found to comply with the limits for

a Class A digital device, pursuant

to part 15 of the FCC Rules. These

limits are designed to provide reason-

able protection against harmful

interference when the equipment is

operated in a commercial environ-

ment. This equipment generates,

uses, and can radiate radio frequency

energy and, if not installed and

used in accordance with the instruc-

tion manual, may cause harmful

interference to radio communica-

tions. Operation of this equipment in

a residential area is likely to cause

harmful interference in which case

the user will be required to correct

the interference at his own expense.

Product Description

FORM 50.40-OM2

9YORK INTERNATIONAL

CHILLER/CONDENSING CONTROL PANEL(S)

All communication with the chiller/condensing units

will occur over a single RS-485 port. Reference Figure

2 and the Installation instructions.

When the OptiView RCC is first turned on it will

initialize by requesting current data and history buffer

information from the units connected. After the history

buffers are lled, only current data will be continuously

requested. Every eight hours the OptiView RCC will re-

initialize. If the control panel updates the history buffer

(a safety shutdown has occurred), the control panel

will send the chiller shutdown data to the OptiView

RCC upon receipt of the next valid OptiView RCC

transmission. The OptiView RCC will recognize that

a safety shutdown has occurred by the Update History

Buffer bit being set. If this bit is ever 1, the data dump is

assumed to be a shutdown data dump and the OptiView

RCC will update its history buffers with the new data

and start a printout of the transmitted data through its

RS232 port. If the OptiView RCC had been requesting

another type of data dump (i.e. a daily schedule dump),

the OptiView RCC will repeat its request on the next

transmission.

While at the Home Screen, the OptiView RCC will

communicate with each unit in order. Once a unit has

been selected by entering the Unit Screen or any screen

below it, that unit will be polled between every unit

in order. This will allow the selected unit to update its

information quickly while still maintaining information

for the Home Screen.

A command string is used to indicate what data the

OptiView RCC is requesting and to modify control data

in the chiller control panel. If the chiller/condensing

unit is in remote control mode then its Local Set

Point, Local Range, Daily Schedule, Holiday, Start

/ Stop Command, and Current / Load Limit can be

programmed from the OptiView RCC. The OptiView

RCC will send a command string once any of these are

modied at the OptiView RCC. If the OptiView RCC

sends a Stop command, the chiller/condensing unit will

turn off. If the OptiView RCC sends a start command,

the chiller/condensing unit will be allowed to run if all

the other run requirements of the unit are made.

A chiller/condensing unit that is in remote control

mode will use local control (set points and start / stop

information), if a valid transmission has not been

received for 5 minutes from the OptiView RCC. The

remote commands will be used again once a valid

new transmission has been processed. The OptiView

RCC will display an error message indicating the

communications problem when such a condition

occurs.

A general status message for each unit is displayed

on the Home Screen. The messages displayed will

include communications status. Not Initialized will

be displayed upon power-up for all units until the

OptiView RCC begins to poll and receive data from

that unit. Initializing… will be displayed while the

OptiView RCC is polling a unit for all current, schedule,

and history data the rst time after power-up. Loss of

Comms will be displayed after 5 minutes have elapsed

with no response from a previously initialized unit. If

any of these messages is displayed, the unit’s button

will be disabled not allowing it to be selected.

The Control Center Microboard (J12) communicates

with this board via a 0/+5VDC serial data communica-

tions link. If this communications link does not operate

properly, correct Microboard J12 serial port operation

can be veried using the Serial Inputs and Outputs

diagnostic procedure in the “Service” section of this

book.

YORK INTERNATIONAL10

• At the chiller/condenser control panel that uses

a rotary switch to set the ID, use a small screw

driver to rotate the rotary switch so that the arrow

points at the number that coincides with the Unit’s

Identication number (ID#). Unit 1 - Unit 8 coincide

to rotary switches 0 - 7. Otherwise program the

panel’s ID through keypad entry.

Never skip an ID#. For example, if

you have four units then they must be

identied from ID#0 - ID#3.

• At the chiller/condenser unit’s control panel, select

the type of control mode. Select REMOTE only if

remote control is desired. Select LOCAL to only

monitor this unit.

• From the Comms Screen of the OptiView RCC,

enter the RCC Poll Time. This is how often (time

in seconds) to request data. This time should be set

long enough to allow for receiving the data.

WIRING

A communications cable must connect the chiller to the

remote panel. This cable should be a three-conductor

with foil shield and drain wire, 20 awg or larger sized

wire, 300v, 80 Deg. C, U.L. Style 2464, U.L. listed

and CSA approved. Three sources are Alpha 5463,

Belden 9364, or Quabbin 0220. The cable length (sum

of lengths of all cables) must not exceed 4000 ft.

(1219 m.).

Never run the communication cable in

close proximity to any power wiring.

For best results, it should be run in

dedicated, grounded conduit. See

Proper Installation Practices.

SECTION 2 – INSTALLATION

MOUNTING

Mount the Remote Control Center at a level that

provides for easy viewing of the color graphic display

by all users. Securely mount it at the desired location.

The panel may be mounted away from the chiller as far

as 4000 ft. (1219 m.) of wiring will allow.

INSTALLATION CHECKLIST

(Reference Fig. 2 for wiring)

• A communications cable must connect the OptiView

RCC to the chiller/condenser control panel. This

cable should be a three-conductor with foil shield

and drain wire, 20 awg or larger wire, 300v, 80 Deg.

C, UL Style 2464, UL listed and CSA approved.

Three sources are Alpha 5463, Belden 9364, or

Quabbin 0220. The cable length (sum of lengths of

all cables) must not exceed 4000 ft. (1219 m.). The

cable is user supplied.

• Obtain ferrite (part number 025-35154-000) from

the cloth bag found in the OptiView RCC and

install it as shown on Fig. 2. This must be installed

to meet FCC and CE requirements.

• Make sure that the Transient Voltage Suppressors are

installed at J12. One is installed from “+” to “GND”

and one is installed from “-” to “GND”.

• At J12 of the OptiView RCC, red wire on RS485(+),

black wire on RS485(-) and white wire on Ground.

• At the OptiView RCC, connect the shield to the

panel.

• Use a tie wrap between the J12 connector and the

Ferrite (part number 025-35154-000) to secure the

shielded cable to the OptiView RCC. The tie wrap

can help prevent the wires from being accidentally

pulled out of the J12 connector by someone working

in the panel or by the weight of the ferrite.

• Install a LAN transient protection module at the

chiller/condenser control panel and connect the

cable according to the type of control panel.

• Make sure the correct EPROM is installed at the

chiller/condenser control panel(s). See Table 1.

• From the Setpoints Screen of the OptiView RCC,

enter the Number of Units Connected (Maximum

value allowed is 8).

Installation

FORM 50.40-OM2

11YORK INTERNATIONAL

The software version is printed on a label adhered to the EPROM chip’s surface. A revision level higher than the one

listed in the table is acceptable. An example version code is as follows:

REQUIRED SOFTWARE VERSION OF THE

CHILLER / CONDENSING UNIT EPROMS

C. ACS. 09. XX.

Revision Level. Increments 01, 02 etc.

Product Code

YCAS (RCP = YCAR, MMC =YCAL/YCUL)

Commercial

TABLE 1 – REQUIRED SOFTWARE VERSION OF THE CHILLER/CONDENSING UNIT EPROMS

UNIT TYPE EPROM PART NO. VERSION

YCAL / YCUL w/microboard 031-01314-000 031-02011-001 C.MMC.01.05

YCAL / YCUL w/microboard 031-02050-000 031-02049-001 C.MMC.03.02

YCAS - F 2 Compressors 031-01798-001 C.ACS.09.03

YCAS - F 3 & 4 Compressors 031-01798-002 C.ACS.10.02

YCAR 2 Compressors 031-02013-001 C.RCP.23.02

YORK INTERNATIONAL12

FIG. 2 – FIELD WIRING OPTIVIEW RCC PANEL

LD06725

Tie Wrap (To help

keep wires

connected)

Ferrite

(025-35154-000)

(FCC & CE

Requirement)

ATransient Voltage

Suppressor

(031-02076-000)

(Factory Installed)

OPTIVIEW REMOTE CONTROL CENTER

Installation

FORM 50.40-OM2

13YORK INTERNATIONAL

FIG. 2 – FIELD WIRING OPTIVIEW RCC PANEL (CONT.)

LD06726

SHLD

BLK

SHLD

RED

(TOTAL NOT TO

EXCEED 8)

WHT

BLK

SHLD

RED

FROM

OPTIVIEW RCC

WHT

BLK

RED

WHT

(COMPONENT

SIDE UP)

(COMPONENT

SIDE DOWN)

(COMPONENT

SIDE DOWN)

CUT PINS

AS SHORT

AS POSSIBLE

CUT PINS

AS SHORT

AS POSSIBLE

YORK INTERNATIONAL14

LAN TRANSIENT INSTALLATION

The properly installed Lan Transient Protection Module,

(part number 031-01586-000) will limit the voltage

levels seen by the chiller control panel’s RS-485 driver

while allowing normal RS-485 network operation under

non-transient conditions. For installation of the module

refer to Fig. 2 and the specic installation instructions

for the microboard.

Unit Microboard 031-01314-000 and

031-02050-001:

Step 1: Label all wires, cables, or components con-

nected to TB1.

Step 2: Carefully loosen each terminal of TB1. Remove

all wires, cables, or components. Be extremely careful

to not allow them to short together or to the enclosure.

Step 3: Refer to the Module. Replace all wires,

cables, or components taken from TB1 into the cor-

rect terminals of the Module terminal strip J1 being

extremely careful to not allow them to short together

or to the enclosure.

Step 4: Carefully tighten all screws on the Module

Terminal strip J1.

Step 5: Orient the Module as shown (component side

down) and cut the unused pins. Insert the four P1

Module pins into TB1 as shown.

Step 6: Carefully tighten each terminal of TB1. Double

check all wiring to the Module before closing up.

Unit Microboard 031-01095-000:

Step 1: Label all wires, cables, or components con-

nected to TB7.

Step 2: Carefully loosen each terminal of TB7. Remove

all wires, cables, or components. Be extremely careful

to not allow them to short together or to the enclosure.

Step 3: Replace all wires, cables, or components taken

from TB7 into the Module terminal strip J1 being

extremely careful to not allow them to short together

or to the enclosure.

Step 4: Carefully tighten all screws on the Module

Terminal strip J1.

Step 5: Orient the Module as shown (component side

up) and insert all six P1 Module pins into TB7 as

shown.

Step 6: Carefully tighten each terminal of TB7. Double

check all wiring to the Module before closing up.

EPROM COMPATIBILITY

Since the concept and design of the OptiView Remote

Control Center may have occurred after the original

EPROM (software) for the chiller/condenser control

panel, the EPROM may need to be replaced with

one that allows for OptiView Remote Control Center

operation. See Table 1.

TROUBLESHOOTING

From the Home Screen you can determine if you are

communicating to the chiller/condensing unit.

If the message Not Initialized.. remains shown on this

screen, proper communication between the panels has

not occurred and you will need to troubleshoot.

Step 1: If you are trying to communicate with more

than one unit, simplify the troubleshooting by isolating

the communication to one unit at a time. Remove any

wiring to a secondary unit and from the Setpoints

Screen of the OptiView RCC, enter one as the Number

of Units Connected and at the chiller/condenser control

panel set it’s ID to zero.

Step 2: Check if there is any communication problem

occurring on the Diagnostic RCC Comms Screen. See

the description of this screen.

You could also check that the RX3 I/O communication

activity LED on the OptiView Main Processor Board is

blinking as it receives data from the chiller/condensing

unit’s control panel. A steady lit RX3 LED is a sign of

improper wiring. If the RX3 LED is not blinking check

the wiring and the installation of the Lan Transient

Protection Module. If everything is properly connected

replace the 485 driver on the chiller/condenser

microboard (part number 031-02074-000).

SAFETY

It is recommended that all maintenance and service

repair work be performed by experienced personnel.

There must be recognition of the potential hazards

that can exist. Those hazards may include (but are

not limited to):

Installation

FORM 50.40-OM2

15YORK INTERNATIONAL

There can be electrical circuitry that

presents an electrocution hazard. Be

sure that the sources of all power

supplies have been properly isolated

and secured before attempting any

service related activities.

External wiring, unless specied as

an optional connection in the manu-

facturer’s product line, is not to be

connected inside the OptiView Remote

Control Center cabinet. Devices such

as relays, switches, transducers and

controls may not be installed inside

the OptiView Remote Control Center.

No external wiring is allowed to be

run through the OptiView Remote

Control Center. All wiring must be in

accordance with YORK’s published

specications and must be performed

only by qualified YORK personnel.

YORK will not be responsible for

damages/problems resulting from

improper connections to the controls

or application of improper control

signals. Failure to follow this will

void the manufacturer’s warranty and

cause serious damage to property or

injury to persons.

PROPER INSTALLATION PRACTICES

Earlier relay systems were virtually immune to radio

frequency interference (RFI), electromagnetic interfer-

ence (EMI), and ground loop currents. Installation

consisted of hooking up the point-to-point wiring and

sizing the wire properly.

In an electronic system, improper installation will

cause problems that outweigh the benets of electronic

control. Electronic equipment is susceptible to RFI,

EMI, and ground loop currents which can cause equip-

ment shutdowns, processor memory and program loss,

erratic behavior, and false readings. Manufacturers of

industrial electronic equipment take into consideration

the effects of RFI, EMI, and ground loop currents and

incorporate protection of the electronics in their designs.

These manufacturers require that certain installation

precautions be taken to protect the electronics from

these effects. All electronic equipment must be viewed

as sensitive instrumentation and therefore requires

careful attention to proper installation procedures.

There are a few basics, that if followed, will result in

a trouble-free installation. The National Electric Code

(N.E.C.) is a guideline for safe wiring practices, but

it does not deal with procedures used for electronic

control installation. Use the following procedures for

electronic equipment installation. These procedures are

to be used in conjunction with the N.E.C.

Wire Sizing

Size supply wires one size larger than required for

amperage draw to reduce instantaneous voltage dips

caused by large loads such as heaters, contactors

and solenoids. Sudden dips in voltage can cause the

processor to momentarily malfunction or cause a

complete reset of the control system. If the wire is

loaded to its maximum capacity, the voltage dips are

much larger, and the potential for a malfunction is

very high. If the wire is sized one size larger than

required, the voltage dips are smaller than in a fully

loaded supply wire, and the potential for malfunction

is much lower.

The NEC code requires specic wire sizes to be used

based on current draw. An example would be to use

#14 gauge wire for circuits up to 15 amp or #12 gauge

wire for circuits of up to 20 amp. Therefore, when

connecting the power feed circuit to an electronic

industrial control, use #12 gauge wire for a maximum

current draw of 15 amp and #10 wire for a maximum

current draw of 20 amp.

Voltage Source (Figure 3)

Selecting the voltage source is extremely important

for proper operation of electronic equipment in

an industrial environment. Standard procedure for

electronic instrumentation is to provide a “clean”

separate source voltage in order to prevent EMI, from

other equipment in the plant, from interfering with

the operation of the electronic equipment. Connecting

electronic equipment to a breaker panel (also known as

lighting panels and fuse panels) subjects the electronic

equipment to noise generated by other devices con-

nected to the breaker panel. This noise is known as

electromagnetic interference (EMI). EMI ows on

the wires that are common to a circuit. EMI cannot

travel easily through transformers and therefore can

be isolated from selected circuits. Use a control

transformer to isolate the electronic control panel from

other equipment in the plant that generate EMI.

YORK INTERNATIONAL16

FIG. 3 – CONTROL INSTALLATION

LD06727

Grounding

Grounding is the most important factor for successful

operation. Electronic equipment reacts to very small

currents and must have a good ground in order to

operate properly. The NEC states that control equipment

may be grounded by using the rigid conduit as a

conductor. This is not acceptable for electronic control

equipment. Conduit is a poor conductor compared

to a copper wire. Copper grounds are required for

proper operation.

Ground Wire Size (Figure 4)

The ground wire must be the same size as the supply

wires or one size smaller as a minimum. The three

phase power brought into the plant must also have a

ground wire, making a total of four wires. In many

installations that are having electronic control problems,

this essential wire is usually missing. A good ground

circuit must be continuous from the plant source

transformer to the electronic control panel for proper

operation. Driving a ground stake at the electronic

control will cause additional problems since other

equipment in the plant on the same circuits will ground

themselves to the ground stake causing large ground

ow at the electronic equipment.

LD06728

FIG 4 – GROUNDING

Wiring Practices (Figure 5)

Do not mix wires of different voltages in conduit. For

an example refer to Figure 5. The motor voltage is 480

volts and the panel control power is 120 volts. The 480

volt circuit must be run from the motor starter to the

motor in its own conduit. The 120 volt circuit must

be run from the motor starter control transformer to

the control panel in its own separate conduit. If the

two circuits are run in the same conduit, transients on

the 480 volt circuit will be inducted into the 120 volt

circuit causing functional problems with the electronic

control. Dividers must be used in wire way systems

(conduit trays) to separate unlike voltages. The same

rule applies for 120 volt wires and 220 volt wires.

Also, never run low voltage wires in the same conduit

with 120 volt wires.

Never run any wires through an electronic control

panel that do not relate to the function of the panel.

Electronic control panels should never be used as

a junction box. These wires may be carrying large

transients that will interfere with the operation of

the control.

When running conduit to an electronic control panel,

note that the access holes (knockouts) are strategically

placed so that the eld wiring does not interfere with

the electronics in the panel. Never allow eld wiring to

come in close proximity with the controller boards

since this will almost always cause problems.

Installation

FORM 50.40-OM2

17YORK INTERNATIONAL

FIG. 5 – SEPARATE CONDUIT INSTALLATION

Do not drill a control panel to locate conduit con-

nections. Drilling can cause metal chips to land in the

electronics and create a short circuit. If you must drill

the panel, take the following precautions:

1. Call the panel manufacturer, if possible, before

drilling the panel to be sure you are entering the

panel at the right place.

2. Cover the electronics with plastic. Tape the plastic

to the board with masking or electrical tape.

3. Place masking tape or duct tape on the inside of

the panel at the point of drill bit entry.

4. Remove all of the remaining chips from the panel

before removing the protective plastic.

When routing conduit to the top of an electronic control

panel, condensation must be taken into consideration.

Water can condense in the conduit and run into the panel

causing catastrophic failure. Route the conduit to the

sides or bottom of the panel and use a conduit drain.

If the conduit must be routed to the top of the panel,

use a sealable conduit tting which is poured with a

sealer after the wires have been pulled, terminated and

the control functions have been checked. A conduit

entering the top of the enclosure must have an

“O” ring-type tting between the conduit and the

enclosure, so that if water gets on top of the enclosure,

it cannot run in between the conduit and the enclosure.

This is extremely important in outdoor applications.

Never add relays, starters, timers, transformers,

etc. inside an electronic control panel without rst

contacting the manufacturer. Contact arcing and

EMI emitted from these devices can interfere with the

electronics. If you need to add these devices contact the

manufacturer for the proper device types and placement.

Never run refrigerant, water or brine tubing inside

an electronic control panel. A leak could damage or in

some cases totally destroy the electronics.

If the electronic control panel has a starter built into

the same panel, be sure to run the higher voltage

wires where indicated by the manufacturer. EMI

from the wires can interfere with the electronics if run

too close to the circuitry.

Never daisy-chain or parallel-connect power or

ground wires to electronic control panels. Each

electronic control panel must have its own supply

wires back to the power source. Multiple electronic

control panels on the same power wires create current

surges in the supply wires which can cause controller

malfunctions. Daisy-chaining ground wires allows

ground loop currents to ow between electronic control

panels which also causes malfunctions. (See Figure 6)

It is very important to read the installation instructions

thoroughly before beginning the project. Make sure you

have drawings and instructions with your equipment.

If not, call the manufacturer and have them send you

the proper instructions. Following correct wiring

procedures will ensure proper installation of your

electronic equipment.

LD06738

FIG. 6 – POWER & GROUND WIRE CONNECTIONS

LD06739

LD06740

YORK INTERNATIONAL18

In order to accept changes made to the chiller

setpoints, the Check key is provided as a

universal ‘Enter’ key or ‘Accept’’ symbol.

In order to reject entry of a setpoint or dismiss

an entry form, the ‘X’ key is provided as a

universal ‘Cancel’ symbol.

Cursor Arrow keys are pro-

vided to allow movement on

screens which contain a large

amount of entry data. In addi-

tion, these keys can be used

to scroll through history and

event logs.

Operation

SECTION 3 – OPERATION

OPTIVIEW REMOTE CONTROL CENTER

The OptiView Remote Control Center display is

highlighted by a full screen graphics display. This

display is nested within a standard keypad, and is

surrounded by “soft” keys which are redened based

on the currently displayed screen. Eight buttons are

available on the right side of the panel, and are primarily

used for navigation between the system screens. At the

base of the display are 5 additional buttons. The area

to the right of the keypad is used for data entry with a

standard numeric keypad provided for entry of system

setpoints and limits.

The Decimal key is used prior to entering

decimal values.

A +/- key has also been provided to allow entry

of negative values and AM/PM selection during

time entry.

00500VIP

FIG. 7

FORM 50.40-OM2

19YORK INTERNATIONAL

OVERVIEW

The new graphical display on each control panel allows

a wide variety of information to be presented to the

user. Each screen description in this document will

begin with a section entitled Overview which will

describe the graphical elements on the screen and

give a short summary of the functions available. Each

element on the screen will then be categorized into

three distinct groups: Display Only, Programmable, and

Navigation. Below is a short description of what types

of information are included in these groups.

DISPLAY ONLY

Values in this group are read-only parameters of

information about chiller operation. This type of

information may be represented by a numerical value,

a text string, or an LED image. For numerical values, if

the monitored parameter is above the normal operating

range, the high limit value will be displayed along with

the ‘>’ symbol; if it is below the normal operating range,

the low limit value will be displayed along with the

‘<’ symbol. In some cases, the value may be rendered

invalid by other conditions and the display will use

X’s to indicate this.

PROGRAMMABLE

Values in this group are available for change by the

user if the chiller/condensing unit is in remote mode.

If there are no values that can be changed then “None”

is shown.

Setpoint / Change Schedule

On screens containing programmable setpoints, a key

with one of these labels will be visible. This key allows

the user to modify setpoints on that screen.

Setpoints

Setpoint values are used to control chillers/condensing

units and other devices connected to the units. Setpoints

can fall into several categories. They could be numeric

values (such as 45.0°F for the Leaving Chilled Liquid

Temperature), or they could Enable/Yes or Disable/No

a feature or function.

Regardless of which setpoint is being programmed, the

following procedure applies:

1. Press the desired setpoint key. A dialog box appears

displaying the present value, the upper and lower

limits of the programmable range, and the default

value.

2. If the dialog box begins with the word “ENTER”,

use the numeric keys to enter the desired value.

Leading zeroes are not necessary. If a decimal point

is necessary, press the ‘•’ key (i.e. 45.0).

Pressing the ▲ key, sets the entry value to the

default for that setpoint. Pressing the ▼ key, clears

the present entry. The ◄ key is a backspace key and

causes the entry point to move back one space.

If the dialog box begins with “SELECT”, use the ◄

and ► keys to select the desired value.

If the previously dened setpoint is desired, press

the ‘X’ (Cancel) key to dismiss the dialog box.

3. Press the ‘ü’ (Enter) key.

If the value is within range, it is accepted and the

dialog box disappears. The chiller will begin to

operate based on the new programmed value. If

out of range, the value will not be accepted and the

user is prompted to try again.

Manual Controls

Some keys are used to perform manual control

functions. These may initiate/terminate processes

such as a report.

Free Cursor

On screens containing many setpoints, a specic “soft”

key may not be assigned to each setpoint value. A

soft key will be assigned to enable the cursor arrow

keys below the numeric keypad which are used to

“highlight” the desired setpoint eld. At this point,

the ‘ü’ key is pressed to bring up a dialog prompting

the user to enter a new setpoint value. The ‘X’ key

cancels cursor mode. (See “Change Schedule” from

the Setpoints Screen for an example.)

NAVIGATION

In order to maximize the amount of values which the

panel can display to the user, and in order to place

those values in context, multiple screens have been

designed to describe each unit’s operation. In order

to move from one screen to the next, navigation keys

have been dened. These keys allow the user to either

SCREEN DESCRIPTIONS AND USAGE

YORK INTERNATIONAL20

Home (page 22)

Unit Data (page 24)

System Data (page 29)

Individual System (page 32)

Hours/Starts (page 34)

Options (page 36)

Trending (page 38)

Trend Setup (page 40)

Setpoints (page 44)

History (page 47)

History Details (page 48)

RCC Setpoints (page 49)

RCC Setup (page 50)

Comms (page 52)

Printer (page 53)

Diagnostics (page 54)

Diagnostics (I/O) (page 55)

Diag. (RCC Comms) (page 56)

This section of the manual will describe each screen

in the order they are accessed as shown in this screen

navigation layout.

move “forward” to a sub-screen of the present screen,

or move “backward” to the previous screen. Except

for the Home Screen display, the upper-right “soft”

key will always return the user to the Home Screen.

Navigating with “soft” keys is as simple as pressing the

key next to the label containing the name of the desired

screen. The system will immediately refresh the display

with the graphics for that screen. Following is a layout

of all the screens and how they are connected.

FIG. 8 – SCREEN NAVIGATION LAYOUT

Operation

FORM 50.40-OM2

21YORK INTERNATIONAL

This page intentionally left blank to maintain formatting

YORK INTERNATIONAL22

HOME SCREEN

OVERVIEW

When the OptiView Remote Control Center is powered

on, the above default display appears. This screen gives

a general overview of the operating status of each unit

connected to the OptiView Remote Control Center. The

data and control of an individual unit is accessed from

the Home Screen display. Fig. 9 is an example that

shows eight units were programmed.

DISPLAY ONLY

Unit Control Temperature

Displays the temperature of what the unit is using for

control such as leaving chilled liquid temperature.

This is not shown if suction pressure is being used

for control.

Unit Type

Displays the type of chiller the unit is.

Unit Status

Displays a general status message for the unit. The

general status message will include communications

status, running status, and fault status, etc. Following is

a complete listing of the general status messages:

• Not Initialized will be displayed upon power-up for

all units until the OptiView Remote Control Center

begins to poll and receive data from that unit. While

this message is displayed, the unit’s button will be

disabled, not allowing it to be selected.

• Initializing… will be displayed while the OptiView

Remote Control Center is polling a unit for all

current, schedule, and history data the rst time

after power-up. While this message is displayed,

the unit’s button will be disabled not allowing it

to be selected.

• Loss of Comms will be displayed after 5 minutes

have elapsed with no response from a previously

initialized unit. While this message is displayed,

the unit’s button will be disabled not allowing it

to be selected.

• Running will be displayed when at least 1 system is

running on a unit with no faults on any system. This

message will be displayed even if the chiller is in any

kind of limiting as long as there are no faults present.

While this message is displayed, the unit’s button

will be enabled allowing it to be selected.

• Not Running will be displayed when no systems

on the unit are running for a non-fault reason but

can run when demand requires. This would be

for the No Cool Load state. While this message

is displayed, the unit’s button will be enabled

allowing it to be selected.

• Faulted will be displayed when no systems on

the unit are running and there is a fault on one or

more systems or a unit fault. While this message

FIG. 9 – HOME SCREEN - EXAMPLE 00499VIPC

Operation

FORM 50.40-OM2

23YORK INTERNATIONAL

is displayed, the unit’s button will be enabled

allowing it to be selected.

• Running / Faulted will be displayed when at least

one system on the unit is running and at least one

system is faulted. While this message is displayed,

the unit’s button will be enabled allowing it to

be selected.

• Cannot Run will be displayed for any non-fault

condition preventing the entire chiller from run-

ning. This would include such things as the daily

schedule, unit switch, all system switches, run

perm, etc. While this message is displayed, the

unit’s button will be enabled allowing it to be

selected.

Unit Run Indicator (LED)

Is ON when the unit is running.

Average Ambient Temperature

Displays the average Ambient Air Temperature of all

the units connected.

PROGRAMMABLE

None

NAVIGATION

Unit #

A detailed view of data relevant to the specied (#) unit.

If the “Not Initialized” status message is displayed,

the unit’s button will be disabled, not allowing it to

be selected.

Setpoints

This screen provides the gateway to many of the

OptiView Remote Control Center’s general setup

parameters such as Date/Time, Comm Setup, Printer

Setup, etc.

YORK INTERNATIONAL24

UNIT SCREEN - EXAMPLES

00569VIPC

FIG. 10A – YCAL CHILLER

FIG. 10B – YCAR CHILLER 00570VIPC

Operation

FORM 50.40-OM2

25YORK INTERNATIONAL

FIG. 10C – YCAS CHILLER 00571VIPC

FIG. 10D – YCUL CONDENSING UNIT

00572VIPC

UNIT SCREEN - EXAMPLES

YORK INTERNATIONAL26

FIG. 10E – YCWS CHILLER 00573VIPC

UNIT SCREEN - EXAMPLES

FORM 50.40-OM2

27YORK INTERNATIONAL

OVERVIEW

This screen is accessed from the Home Screen. The

primary values of the chiller or condensing unit which

must be monitored and controlled are shown on this

screen. The data available depends on the type of unit.

This screen display depicts a visual representation of

the unit itself. Animation indicates chilled liquid ow

and condenser fans running.

DISPLAY ONLY

Systems Statuses

Displays the individual refrigerant systems operational

statuses. The messages displayed include running

status, cooling demand, fault status, external cycling

device status, load limiting, and anti-recycle timer

status. The status message that is displayed on the

microprocessor is represented here.

System Run (LED)

Is ON when the individual refrigerant systems compres-

sor is running. If any of these are ON, the fans will be

animated to show that they are running.

Slide Valve Step (If Screw)

Displays the individual refrigerant systems slide valve

step.

Load Stage (If Recip)

Indicates the number of solenoids on the compressor of

a YCAR unit that are de-energized and loaded.

Number Of Compressors Running (If a system has

more than one)

Displays how many compressors are running on the unit.

System Run Time

Displays the individual refrigerant systems logged run

time since the last compressor start, in days (Days),

hours (Hr), minutes (Min) or seconds (Sec).

Lead System

This message indicates which system is in the lead.

Evaporator Pump Contact (LED)

Is ON when the evaporator pump signal from the

microprocessor is on. If this is ON, the chilled liquid

will be animated to show that it is owing.

Evaporator Heater (LED)

Is ON when the evaporator heater signal from the

microprocessor is on.

Leaving Chilled Liquid Temperature

Displays the temperature of the liquid as it leaves

the evaporator.

Return Chilled Liquid Temperature

Displays the temperature of the liquid as it enters

the evaporator.

Discharge Air Temperature

Displays the discharge air temperature leaving the

evaporator when the condensing unit is programmed

for Discharge Air control.

Systems Suction Pressure

Displays the suction pressure for each individual system

on a condensing unit when the unit was programmed

for Suction Pressure control.

Ambient Temperature

Displays the outdoor Ambient Air Temperature.

PROGRAMMABLE

Initiates a printout of current system operating

parameters for the currently selected unit.

Cancel Print

Terminates the printing in process. This key is only

visible while printing is in process.

NAVIGATION

Home

Causes an instant return to the Home Screen.

System Data

Used to provide additional system information.

Hours/Starts

This screen shows the cumulative operating hours and

start count of each compressor.

Options

Used to provide information of the options that were

programmed at the Unit Control Panel.

Trending

This screen provides the user a view of trending data on

selected parameters of this chiller/condensing unit.

Setpoints

This screen provides a single location to program the

unit setpoints for the selected unit.

History

This screen provides access to a snapshot of system data

at each of the last 4-6 shutdown conditions.

UNIT SCREEN

YORK INTERNATIONAL28

Operation

This page intentionally left blank.

FORM 50.40-OM2

29YORK INTERNATIONAL

SYSTEMS SCREEN - EXAMPLES

FIG. 11A – YCAL CHILLER 00505VIPC

FIG. 11B – YCAR CHILLER 00506VIPC

FIG. 11C – YCAS CHILLER 00507VIPC

FIG. 11D – YCUL CONDENSING UNIT 00508VIPC

SYSTEMS SCREEN - EXAMPLES

Operation

OVERVIEW

This screen is accessed from the Unit Screen. A chiller

can consist of separate refrigerant circuits. Each

refrigerant circuit is referred to as a system. This

screen shows system specic information for each of

the unit’s refrigerant systems. This information can

vary according to the type of chiller. Reference the

chiller’s Installation, Operation, Maintenance Manual

(IOM) for details.

DISPLAY ONLY

System Status

Displays this refrigerant systems operational status.

The messages displayed include running status, cooling

demand, fault status, external cycling device status,

load limiting, and antirecycle timer status. The status

message that is displayed on the Unit’s microprocessor

is represented here.

System Run (LED)

Displays this refrigerant systems operational status. Is

ON when the system is running.

Locked Out (LED)

Is ON when a system is locked out on a fault requiring

a manual reset at the chiller or condenser unit micro

panel.

System Run Time

Displays the amount of time the system has run.

Temperatures and pressures are either measured directly

by transducers and temperature sensors, or computed

from these measurements. Depending on the type of

chiller, the following temperatures and pressures could

be displayed:

• Discharge Pressure • Oil Pressure

• Suction Pressure • Oil Temperature

• Discharge Temperature • Suction Superheat

• Saturated Discharge Temperature

• Discharge Superheat

• Suction Temperature

• Saturated Suction Temperature

Motor Current (%FLA)

This displays the motor current of the system in percent

of full load amps.

Slide Valve Step (If screw)

This indicates the compressor slide valve step.

Compressors Running

(If more than one compressor per circuit)

Indicates the number of compressors running

Load Limit Stage

Indicates which stage of Load Limiting a unit is in.

Load Stage

Indicates the number of solenoids on the compressor of

a YCAR unit that are de-energized and loaded.

Condenser Fan Stage

Displays the stage of condenser fan operation on the

system.

Cooler Inlet Refrigerant temperature (Only if in

R-407c mode)

Displays the refrigerant temperature at the inlet of

the cooler.

Liquid Line Solenoid (LED)

Is ON when the Liquid Line Solenoid Valve is energized/

open.

Economizer Solenoid (LED)

Is ON when the economizer Thermal Expansion Valve

Solenoid is energized/open.

Oil Cooling Solenoid (LED)

Is ON when the Oil Cooling Solenoid Valve is energized/

open.

Compressor Heater (LED)

Is ON when the compressor heater is on.

Hot Gas Bypass (LED)

Is ON when the hot gas bypass valve is open.

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen of the

selected unit.

System #

A detailed view of the specied (#) system information.

SYSTEMS SCREEN

YORK INTERNATIONAL32

INDIVIDUAL SYSTEM SCREEN

FIG. 12A – YCAS CHILLER

FIG. 12B – YCAR CHILLER

00509VIPC

00510VIPC

Operation

FORM 50.40-OM2

33YORK INTERNATIONAL

OVERVIEW

This screen is accessible from the SYSTEM screen

when there is much data to view about an individual

system. It displays data only from the selected system.

Reference the chiller’s Installation, Operation, Main-

tenance Manual (IOM) for details about the data.

Depending on the type of chiller, the following data

might be displayed:

DISPLAY ONLY

The following system information is displayed at the

top of the screen:

Locked Out (LED)s

System Run Time

System Run (LED)

Liquid Line Solenoid (LED)

The following discharge readings are grouped together

and displayed:

Discharge Pressure

Saturated Discharge Temperature

Discharge Temperature

Discharge Superheat

The following suction readings are grouped together

and displayed:

Suction Pressure

Saturated Suction Temperature

Suction Temperature

Suction Superheat

The following oil readings are grouped together and

displayed:

Oil Pressure

Low Differential Oil Pressure

High Differential Oil Pressure

Oil Temperature

The following miscellaneous readings are grouped

together and displayed:

Motor Current (%FLA)

Slide Valve Step or Load Stage

Pressure Ratio

Ambient Temperature

The following miscellaneous information is displayed

separately:

Economizer Solenoid (LED)

Hot Gas Bypass Solenoid (LED)

Oil Cooling Solenoid (LED)

Condenser Fan Stage

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

System Data

Causes an instant return to the System Screen.

YORK INTERNATIONAL34

HOURS AND STARTS SCREEN

FIG. 13A – YCAL CHILLER 00511VIPC

FIG. 13B – YCAS CHILLER 00512VIPC

Operation

FORM 50.40-OM2

35YORK INTERNATIONAL

OVERVIEW

This screen, accessed from the UNIT screen, displays

the total operating hours and the total number of starts

for all systems on the unit.

DISPLAY ONLY

Total Starts

Displays the number of times the compressor has

been started.

Operating Hours

Displays the number of hours the compressor has

run.

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

YORK INTERNATIONAL36

OPTIONS SCREEN

FIG. 14A – YCAL CHILLER

FIG. 14B – YCAS CHILLER / YCAR CHILLER

00513VIPC

00514VIPC

Operation

FORM 50.40-OM2

37YORK INTERNATIONAL

OVERVIEW

This screen, accessed from the UNIT screen, displays

all the dip switch settings and other programmable

options at the chiller micro panel. These items can only

be changed at the chiller micro panel and not at the

OptiView Control Center. Depending on the type of

chiller, the following data might be displayed:

DISPLAY ONLY

Units Display Mode

The units selected at the OptiView Remote Control

Center, either Imperial or SI, is displayed. In Imperial

Units temperatures will be in °F and pressures will be

in PSIG or PSID. In SI units temperatures will be in °C

and pressures will be in BARG or BARD.

The values at the OptiView Remote

Control Center will be displayed in

the units that are selected on it’s

Setpoints screen regardless of what is

programmed at the chiller/condensing

unit.

Refrigerant Type

The refrigerant, either R-407C or R-22, selected at the

chiller micro panel is displayed.

Chilled Liquid Type

The cooling mode, either Water or Glycol, selected at

the chiller micro panel is displayed.

Ambient Control Mode

The ambient mode, either Standard or Low Ambient,

selected at the chiller micro panel is displayed.

Local/Remote Control Mode

The control mode selected at the chiller micro panel,

either Local or Remote, is displayed.

Language Display Mode

The language selected at the chiller micro panel (i.e.

English) is displayed.

Lead/Lag Control Mode

The Lead/Lag control at the chiller micro panel is

displayed, either Automatic or Manual. This control

is used to select which compressor starts. See the unit’s

Installation, Operation and Maintenance Manual for

a description.

Fan Control Mode

The fan control at the unit’s micro panel is displayed,

either Discharge Pressure or Ambient and Discharge

Pressure.

Unit Control Mode

What the chiller/condensing unit control is based on

is displayed, either Leaving Liquid, Return Liquid,

Suction Pressure, or Discharge Air Temperature.

Unit Software Version

The software version of the EPROMS at the chiller/

condensing unit’s micro panel .

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

YORK INTERNATIONAL38

OVERVIEW

This screen is accessed from the UNIT screen. As many

as six Operator selected parameters can be plotted in

an X/Y graph format. The X-Axis is scaled per the

selected Data Collection Interval and displayed in a

time of day or elapsed time format, as selected with

the X-axis toggle key. The Y-Axis is scaled for each

parameter per the selected minimum and maximum

value for each parameter. Analog parameters are scaled

in pressure, temperature, volts, amps, hertz or time.

Digital on/off parameters are scaled as zero (off) and

one (on). Only one Y-Axis label is displayed at a time.

The Y-Axis Toggle Key is used to toggle the Y-Axis

labels through the different parameters. The Y-Axis

label that is being displayed is identied at the top of the

graph. All parameters are displayed simultaneously. For

identication, each plotted parameter and associated

Y-Axis labeling is color coordinated.

The parameters are sampled at the selected Data

Collection Interval and plotted using 450 data points

across the X-Axis. If the actual value of the sampled

parameter is less than the Y-Axis label minimum for

that parameter, the value will be plotted at the minimum

value. Similarly, if the actual value is greater than the

Y-Axis label maximum for that parameter, the value

will be plotted at the maximum value.

There are two types of charts that can be created: ONE

SCREEN or CONTINUOUS. When the plotting has

reached the end of the X-Axis, one of the following

will occur, depending on which is selected: If ONE

SCREEN has been selected, the trending stops and the

data is frozen. If CONTINUOUS has been selected,

the oldest data is dropped from the left-hand side of the

graph at the next Data Collection Interval. Thereafter,

the oldest data is dropped from left-hand side of the

graph at each Data Collection Interval.

Only parameters from the selected Unit are trended.

The same parameters that have been selected for a Unit,

will be selected by default for the next selected Unit.

When on the Home screen, a Unit is not selected and

any trending is stopped. Trending is also stopped if a

power failure occurs while it is running. After trending

is stopped, the last screen of data that was collected will

be displayed on the trending screen and the START key

must be pressed to initiate a new trend screen.

DISPLAY ONLY

This screen allows the user to view the graphical

trending of the selected parameters and is also a

gateway to the graph setup screens.

TRENDING SCREEN

FIG. 15 TRENDING 00574VIPC

Operation

FORM 50.40-OM2

39YORK INTERNATIONAL

A red screen with the words “TREND

MAX MUST BE > TREND MIN”

will appear if the Y-Axis minimum

has been programmed to a value that

is greater than the Y-Axis maximum

for any parameter. If this appears,

proceed to the Trend Setup Screen to

change the values.

PROGRAMMABLE

Start

Pressing this key clears the graph, starts a new graph

and begins the trending. The trending will continue

until the STOP key is pressed, the Home screen is

displayed, or a power failure occurs. This key is only

available if trending is stopped.

Stop

Pressing this key stops the trending. The trend data

is frozen on the display until another graph is started

with the START key. The Stop key is only available

if trending is running.

Y-Axis

This key toggles the Y-Axis labels of the graph. Each

key press changes the label to another of the selected

parameters.

X-Axis

This key toggles the X-Axis labels of the graph.

Each key press alternates the scaling between time of

day and elapsed time. The Time of Day scaling is in

24-hour format. The Elapsed Time scaling is the time

elapsed since the START key was pressed, starting

the trending.

NAVIGATION

Home

Causes a return to the Home Screen.

Unit Data

Causes a return to the Unit Screen.

Trend Setup

Only displayed if the trending is stopped. Causes

a jump to a sub-screen for conguring the trending

display.

YORK INTERNATIONAL40

OVERVIEW

This screen is accessed from the Trending screen.

This screen is used to congure the trending screen.

The parameters to be trended are selected from the

Common Slots Screen or Common Slots Master list

and entered as Slot Numbers for Data Points 1 through

6. The Y-Axis minimum and maximum values for each

parameter are entered as Data Point Min and Data Point

Max for Data Points 1 through 6. The interval at which

all the parameters are sampled is selected as the Data

Collection Interval.

DISPLAY ONLY

None

PROGRAMMABLE

Chart Type

Selects either CONTINUOUS or ONE SCREEN type

of graph.

Collection Interval

Selects the interval at which the parameters are sampled.

There are 450 data points displayed across the X-Axis

of the graph. Each point represents the instantaneous

value of the parameter. The user selects the time

interval between these points. This is called the DATA

COLLECTION INTERVAL, or the interval at which

the parameter is sampled. This interval is programmable

over the range of 1 second to 3600 seconds (1 hour), in

one second increments. The selected interval not only

determines the sample interval, but also the full screen

time display. The full screen time display is a result

of the selected interval in seconds, multiplied by the 450

data points. For example, if the Data Collection Interval

is programmed for 900 seconds, the parameter would

be sampled every 900 seconds, with the last 112.5 hours

(4.7 days) of data viewable on the screen. Therefore, the

selected interval is a compromise between resolution

and full screen time display. Select the desired Data

Collection Interval as follows:

1. Determine the desired time interval (in seconds),

between data samples.

2. Calculate the full screen time display as follows:

• 450 x Data Collection Interval = full screen

seconds

• full screen seconds / 60 = full screen minutes

• full screen minutes / 60 = full screen hours

• full screen hours / 24 = full screen days

3. Decide if the resultant sample interval and full

screen display meet the requirements. If not, select

a different sample interval.

TREND SETUP SCREEN

FIG. 16 TREND SETUP 00575VIPC

Operation

FORM 50.40-OM2

41YORK INTERNATIONAL

Select

This key is used to enter the slot numbers and the

minimum and maximum Y-Axis values of each param-

eter to be trended. Pressing this key places a yellow

box around Data Point 1 Slot Number. Use the ▲ and

▼ navigation keys to place the box around the value of

Data Points 1 through 6 to be changed. With the desired

value selected, press the ‘4’ (Enter) key. A dialog box

is displayed permitting data entry.

Data Point Slot # (1-6)

Use the SELECT key as described above and enter

the slot number from the Trend Common Slots Screen

of the desired parameter to be trended. The selected

parameter description will be displayed for the Data

Point. Setting this slot number to zero will disable

trending for that particular Data Point. Any or all points

can be disabled.

Data Point Min (1-6)

Only displayed if the Associated Slot Number is not

Zero. This is the minimum value displayed for the

Y-Axis. Selecting a parameter for a Data Point sets

this to the default value, which is the lowest value

allowed for that parameter. It can be changed to a

value that provides a more appropriate resolution for

the parameter being monitored. To change, use the

SELECT key as described above and enter the desired

value. The value must always be set to a value less

than the Data Point Max. Otherwise, a red graph is

displayed on the Trend Screen with the words “TREND

MAX MUST BE > TREND MIN”. If the parameter

selected for this data point is a digital type (on/off),

this value must be set to zero (0). Zero indicates the

OFF state.

Data Point Max (1-6)

Only displayed if the associated slot number is not zero.

This is the maximum value displayed for the Y-Axis.

Selecting a parameter for a Data Point sets this to the

default value, which is the highest value allowed for that

parameter. It can be changed to a value that provides a more

appropriate resolution for the parameter being monitored.

To change, use the SELECT key as described above and

enter the desired value. The value must always be set to

a value greater than the Data Point Min. Otherwise, a red

graph is displayed on the Trend Screen with the words

“TREND MAX MUST BE > TREND MIN”. There are

20 Y-axis divisions. If a MIN-MAX span is selected that is

not evenly divided by 20, the Program will automatically

select the next higher MAX value that makes the span

evenly divided by 20. For example, if 0.0 is selected as

the MIN, and 69.0 as the MAX, the Program will insert

70.0 as the MAX value. If the parameter selected for this

data point is a digital type (on/off), this value must be set

to one (1). One indicates the on state.

NAVIGATION

Home

Causes a return to the Home Screen.

Unit Data

Causes a return to the Unit Screen.

Trending

Causes a return to the Trending Screen.

Slot Numbers

Causes a jump to the Trend Common Slots Screen.

The slot numbers of the most commonly monitored

parameters are listed on this screen. The parameters

are arranged to make it easier to nd the slot number

of the desired parameter to plot.

YORK INTERNATIONAL42

This page intentionally left blank.

FORM 50.40-OM2

43YORK INTERNATIONAL

This page intentionally left blank.

00515VIPC

YORK INTERNATIONAL44

SETPOINTS SCREEN - EXAMPLES

FIG. 17A – YCAL CHILLER

FIG. 17B – YCAS CHILLER 00516VIPC

Operation

FORM 50.40-OM2

45YORK INTERNATIONAL

FIG. 17C – YCAR CHILLER 00517VIPC

YORK INTERNATIONAL46

SETPOINTS SCREEN

Operation

OVERVIEW

This screen, accessed from the Unit screen, provides a

convenient location for programming the most common

setpoints involved in the chiller/condensing unit control.

The setpoints depend on the type of unit.

Values on this screen are only pro-

grammable if the chiller/condensing

unit is in remote control mode. These

values are only viewable if the unit is

in local mode.

DISPLAY ONLY

None

PROGRAMMABLE

Leaving Chilled Liquid Temperature or

Return Chilled Liquid Temperature or Suction

Pressure or Discharge Air Temperature Setpoint

This value allows the user to dene the cooling setpoint

that is to be maintained by the chiller/condensing unit.

See the unit’s Installation, Operation and Maintenance

Manual (IOM) for it’s programmable range.

Leaving Chilled Liquid Temperature or Return

Chilled Liquid Temperature or Suction Pressure or

Discharge Air Temperature - Control Range

This is the maximum allowable positive and negative

deviation that is acceptable from setpoint in the system

application. See the unit’s Installation, Operation and

Maintenance Manual (IOM) for it’s programmable

range.

Remote Chiller Run or Remote Unit Run

The chiller/condensing unit can be selected to either

Run or Stop. Selecting Stop will command the

chiller/condensing unit to shut down. Selecting Run

will allow the chiller/condensing unit to turn on.

Current Limit Setpoint

This is the motor current limiting setpoint. The chiller

will be limited from loading when the motor current

equals or exceeds this value. Typically, for most instal-

lations, no limiting is required and the programmed

limiting will be set at or above 100%.

Load Limit Setpoint (YCAL Chillers)

Load Limiting can be programmed from 0 to 2.

Load Limit 0 = no load limit

Load Limit 1 = 50% load limit - 2/4 compressor units.

Load Limit 1 = 66% load limit - 3/6 compressor units.

Load Limit 2 = 33 % - 3/6 compressor units only.

Change Schedule

The daily schedule is a 1 week schedule and must

be programmed for the start and stop time for each

week day and a holiday if desired. A box is provided to

specify which days are to use the holiday schedule.

Programming the same time for both

Start and Stop times will cause the

display to enter 00.00 for both times

which will cause the chiller to always

be allowed to run.

Repeat Monday

The other days can be selected to change to the Monday

schedule.

Clear Schedule

In a situation where it is required to run the chiller

24 hours a day, 7 days a week, the Chiller Control

panel should rst have its entire Daily Schedule zeroed

(00.00) for all Start and Stop times. This puts the chiller

in the run mode at all times. The OptiView Remote

Control Center may now be programmed with all

zeroes (00.00) for all Start and Stop times by pressing

the Clear Schedule button. Since the chiller panel is

already in the run mode, programming the OptiView

Remote Control Center for all zeroes will keep the

chiller in this mode indenitely, allowing the chiller to

run whenever demand requires.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

FORM 50.40-OM2

47YORK INTERNATIONAL

HISTORY SCREEN

OVERVIEW

This screen allows the user to browse through the faults.

In order to get a more thorough reporting of the system

conditions at the time of the recorded shutdown, move

to the sub-screen HISTORY DETAILS.

The user may use the Select Fault button to select

the history to view. At this point the View Details

button is used to jump to a sub-screen containing stored

chiller parameters values at the time of the shutdown.

Additionally, the Print History button can be used to

generate a hard-copy report of the parameter values at

the time of the shutdown.

DISPLAY ONLY

Last Faults

This window displays a chronological listing (most

recent rst) of the date and time and the description

of the last four to six safety shutdowns (depending

upon the type of chiller) that occurred while the system

was running.

PROGRAMMABLE

Print History

This generates a report listing the status of the chiller

parameters at the time of the selected shutdown.

Print All Histories

This generates a report listing the status of the chiller

parameters at the time of each of the stored shutdowns.

Cancel Print

Terminates the printing in process. This key is only

visible while printing is in process.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

View Details

Causes a move to a sub-screen containing the value of

select chiller parameters at the time of the associated

shutdown.

00518VIPC

FIG. 18

YORK INTERNATIONAL48

HISTORY DETAILS SCREEN

OVERVIEW

This screen allows the user to see an on-screen printout

of all the system parameters at the time of the selected

shutdown. Not all screens are shown above. The number

of screens required to display all of the data varies

according to the type of unit selected.

DISPLAY ONLY

History Printout

This is the on-screen printout of the system param-

eters.

PROGRAMMABLE

Page Up

Scroll up in the displayed data (if applicable).

Page Down

Scroll down in the displayed data (if applicable).

NAVIGATION

Home

Causes an instant return to the Home Screen.

Unit Data

Causes an instant return to the Unit Screen.

History

Causes a return to the History Screen.

FIG. 19 00519VIPC

Operation

FORM 50.40-OM2

49YORK INTERNATIONAL

RCC SETPOINTS SCREEN

OVERVIEW

This screen is accessed from the Home Screen.

This screen shows conguration parameters for this

OptiView Remote Control Center. This screen also

serves as a gateway to more sub-screens for dening

general system parameters.

DISPLAY ONLY

None

PROGRAMMABLE

Number of Units Connected

Allows the user to program how many units the Control

Center will need to communicate to.

FIG. 20 00520VIPC

NAVIGATION

Home

Causes an instant return to the Home Screen.

Setup

This screen provides a single location to program the

general system setup parameters such as Date/Time.

It is also the gateway to many of the general system

setup parameters such as Communications, Printer

Setup, etc.

YORK INTERNATIONAL50

RCC SETUP SCREEN

OVERVIEW

This screen is accessed from the RCC Setpoint

Screen. This screen shows the general conguration

parameters for this OptiView Remote Control Center.

It allows programming of the time and date, along with

specications as to how the time will be displayed

(12 or 24 hour format). This time is used for display

purposes on the OptiView Remote Control Center. It

is not used to reset individual chiller clocks and has no

effect on individual chiller schedules. This screen also

serves as a gateway to more sub-screens for dening

general RCC system parameters.

DISPLAY ONLY

None

PROGRAMMABLE

Clock (Enabled / Disabled)

Allows the user to enable or disable the real-time clock

in order to conserve battery life. The clock will be

disabled during manufacturing and must be enabled at

system commissioning. In addition, when preparing

for prolonged shutdown the clock should once again be

disabled.

Set Date

Allows the user to specify the present date. When

prompted to enter a date value, the user must enter the

day, month, and four-digit year (using leading zeroes as

necessary). If within range, the value will be accepted.

If out of range, the user is prompted for the information

again. At this point the user may retry the date entry, or

cancel the programming attempt.

Set Time

Allows the user to specify the present time. When

prompted to enter a time value, the user must enter

the hour and minute desired (using leading zeroes as

necessary). If the chiller is presently set to 24-hour

mode, the time must be entered in the 24-hour format.

Otherwise, the user must also select AM or PM for the

entered time. If out of range, the user is prompted for

the information again. At this point the user may retry

the time entry, or cancel the programming attempt.

12/24 Hr

Allows the user to specify the format in which the time

will be presented to the user. This setpoint will only affect

the display of the time on the OptiView RCC panel and

on all reports generated. 12-Hour time format will include

the AM and PM modiers and show the range of time

between 1:00 and 12:59, while the 24-Hour time format

will show the range of time between 0:00 and 23:59.

FIG. 21 00521VIPC

Operation

FORM 50.40-OM2

51YORK INTERNATIONAL

Units

Dene the unit system (Imperial or SI) used by the

OptiView RCC display. This selection has no effect on

the chiller/condensing unit micro panel.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Setpoints

Causes a return to the Setpoints Screen.

Comms

Moves to the sub-screen allowing configuration of

system communications.

Printer

Moves to the sub-screen allowing conguration and

control of printer functions.

Diagnostics

Moves to the sub-screen allowing limited diagnostic

capability while operating.

YORK INTERNATIONAL52

COMMS SCREEN

OVERVIEW

This screen is accessed from the RCC Setup Screen.

This screen allows denition of the necessary com-

munications parameters. Refer to PRINTER Section

of this book for details of the Printer connections

and setup.

DISPLAY ONLY

RS-485 Baud Rate 4800

Shows the baud rate at which the panel shall com-

municate through the Com3 port to the remote control

panel(s). The baud rate of the remote control panel(s)

must be set for 4800 in the EPROM. Make sure the

correct EPROM is installed at the chiller/condenser

control panel(s). See Table 1.

PROGRAMMABLE

RCC Poll Time (5-30 sec.)

Dene the poll time (how frequently) this panel requests

for data from another panel through the Com3 port.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Setup

Return to the Setup Screen.

FIG. 22 00522VIPC

Operation

FORM 50.40-OM2

53YORK INTERNATIONAL

PRINTER SCREEN

OVERVIEW

This screen is accessed from the RCC Setup Screen.

This screen allows denition of the necessary com-

munications parameters for the printer. Refer to

PRINTER section of this book for details of the Printer

connections and setup.

DISPLAY ONLY

None.

PROGRAMMABLE

Automatic Printer Logging (Enabled / Disabled)

Enable the printer to begin printing status reports

beginning at the programmed start time and recurring

at the interval dened above.

Log Start Time

Set the time at which scheduled logs will begin.

Log Output Interval

Dene the interval at which logging will occur. We

suggest you select a reasonable amount of time so that

it is not occurring too much.

Log Unit Selected

Select a unit or all units to logs of.

Printer Type

Dene the printer type connected to the OptiView RCC.

Printer Baud Rate

Dene the baud rate at which the panel shall com-

municate to the printer.

Printer Data Bit(s)

Dene the number of data bits with which the panel

shall communicate to the printer.

Printer Parity Bit(s)

Dene the number of parity bits with which the panel

shall communicate to the printer.

Printer Stop Bit(s)

Dene the number of stop bits with which the panel

shall communicate to the printer.

Cancel Print

Terminates the printing in process. This key is only

visible while printing is in process.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Setup

Return to the Setup Screen.

FIG. 23 00523VIPC

YORK INTERNATIONAL54

DIAGNOSTICS SCREEN

FIG. 24

OVERVIEW

This screen is accessed from the RCC Setup Screen.

This screen provides a view of what software is in use

and provides access to a screen for troubleshooting

analog and digital inputs.

DISPLAY ONLY

Software Versions

The following software versions are displayed:

• RCC - FLASH Memory Card on Microboard

• BIOS - BIOS EPROM on Microboard

• Kernel - Software that is part of FLASH Memory

Card

• GUI - Software that is part of FLASH Memory

Card

• SIO - Software that is part of FLASH Memory

Card

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Setup

Return to the Setup Screen.

I/O

Moves to the sub-screen allowing diagnostics of the

analog and digital inputs.

RCC Comms

Moves to the sub-screen allowing diagnostics of

communications with the RCC.

00524VIPC

Operation

FORM 50.40-OM2

55YORK INTERNATIONAL

FIG. 25

DIAGNOSTICS I/O SCREEN

OVERVIEW

This screen is accessed from the Diagnostics Screen.

This screen provides a view of the analog and digital

inputs for troubleshooting .

DISPLAY ONLY

Diagnostics is used to analyze the Analog Inputs at the

Microboard. The voltage level of each Analog Input, as

interpreted by the Microboard, is displayed. “Counts”

is an Analog-to-Digital (A/D) converter value and is for

manufacturing and engineering use only.

Diagnostics is also used to analyze the state of each

Microboard Program Jumper and Program DIP Switch

as interpreted by the Microboard. These are depicted

by an LED.

PROCEDURE

Digital Inputs:

1. The Digital Inputs are listed on this screen according

to a.) Microboard Program Jumpers and Program

DIP Switches. Tables 2 and 3 list the functions of

the Program Jumpers and Switches.

2. If a Program Jumper is present, the applicable

LED should be extinguished. If the LED is not

extinguished, the Microboard is defective.

3. If a Program Jumper is not present, the applicable

LED should be illuminated. If the LED is not

illuminated, the Microboard is defective.

4. If a Program Switch (DIP) is in the ON position, the

applicable LED should be illuminated. If the LED is

not illuminated, the Microboard is defective.

5. If the Program Switch (DIP) is in the OFF position,

the applicable LED should be extinguished. If

the LED is not extinguished, the Microboard is

defective.

6. When all desired tests have been performed,

press DIAGNOSTICS key to return to MAIN

DIAGNOSTICS Screen.

PROGRAMMABLE

None

NAVIGATION

Home

Causes an instant return to the Home Screen.

Diagnostics

Causes a return to the previous screen.

00525VIPC

YORK INTERNATIONAL56

DIAGNOSTICS RCC COMMS SCREEN

OVERVIEW

This screen is accessed from the Diagnostics Screen.

This screen provides a view of communication for

troubleshooting .

Communication between the OptiView RCC and the

chiller/condenser control panel(s) should consist of

the RCC polling (requesting a response from) each

chiller/condenser control panel starting with Unit 1

and continuing to Unit “x”, where “x” is the Number

of Units Connected as entered on the RCC Setpoints

Screen. Each poll will increment the Poll Count. A

reply should be sent back to the RCC from the Unit that

was polled within a certain amount of time. If this reply

does not happen within this time period the Timeout

Count will be incremented. If the reply is returned but

contains improper data, then the Bad Csum Count will

be incremented. If the reply is successfully received by

the RCC then the Reply Count is incremented.

Good communication is indicated by the Poll Count

and the Reply Count keeping close to the same

count. A high Timeout Count could imply that the

chiller/condenser control panel did not properly receive

the request or it did not properly send a response.

Check the wiring and the Installation Checklist. A high

Bad Csum Count could be indicative of noise being

transmitted. This can happen because of improper

wiring or grounding.

DISPLAY ONLY

Unit Type

Displays the chiller type, whether it is a “Screw”,

“Recip”, or Scroll” and the number of compressors for

the “Unit x”, where x is the number of the unit.

Poll Indicator (LED)

Is on when the last noted communication through the

Com3 port was to poll a chiller/condenser control

panel.

Reply Indicator (LED)

Is on when the last noted communication through

the Com3 port was to receive a reply from a chiller/

condenser control panel.

Poll Count

A count of each poll request through the Com3 port to

a chiller/condenser control panel.

Reply Count

A count of each reply successfully received through the

Com3 port from a chiller/condenser control panel.

Bad Csum Count

A count of each reply received through the Com3 port

from a chiller/condenser control panel that had a bad

Csum calculation. This indicates that improper data

was received.

FIG. 26 00526VIPC

Operation

FORM 50.40-OM2

57YORK INTERNATIONAL

Timeout Count

A count of each poll request through the Com3 port

to a chiller/condenser control panel that did not get

a reply within the timeout period (time to wait for

a reply).

PROGRAMMABLE

Clear Counters

Resets all the counts to zero.

NAVIGATION

Home

Causes an instant return to the Home Screen.

Diagnostics

Causes a return to the previous screen.

YORK INTERNATIONAL58

DISPLAY MESSAGES

A title bar will be displayed on all screens. This title

bar will contain the OptiView Remote Control Center

date and time on all RCC screens. This title bar will

contain the Chiller/Condensing unit’s date and time on

all unit screens. On the Home Screen the message will

read “YORK REMOTE CONTROL CENTER”. On

all other screens it will contain the unit selected and

either the chiller type or will be based on the number

of compressors of that unit.

When a unit has been selected the title bar will display

a dual message on every screen. The rst message

will display the Unit Selected in the format “Unit x”,

where x is the number (1 – 8) of the unit selected. The

second message will display the chiller type, whether

it is a “Screw”, “Recip” or “Scroll” and the number

of compressors.

On the Unit Screen and all System Screens the title bar

contains another message called a Status. The current

status of each unit is displayed in this message. These

messages will include running status, cooling demand,

fault status, external cycling device status, load limiting

and anti-recycle timer status, etc. A System Status

message and a Unit Status message are never displayed

simultaneously. A single message is displayed for a

Unit Status message, while a separate System Status

message will display for each system on multi-circuit

units.

Status messages fall into the categories of warning,

safety, and normal with each of the categories discussed

following:

• Warning messages are denoted by yellow message

text. A warning message is shown for any special

running condition and for all unit warnings.

Any kind of load limiting would be an example

of a warning message. An incorrect refrigerant

programmed warning would also be an example

of a warning message.

• Safety messages are denoted by red message text.

A safety message is shown for any type of safety

shutdown, lock-out, or run inhibit. High discharge

pressure would be an example of a safety shutdown

message.

• Normal messages are denoted by green text.

A normal message is shown for any non-fault

normal condition. The compressor running and

no cooling load messages would be examples of

normal messages.

Note that there are two types of shutdowns. If the

chiller shuts down on a SAFETY shutdown, it requires

the operator to perform a manual reset at the keypad. A

NORMAL shutdown occurs from a properly requested

or scheduled shutdown. The event that caused the

shutdown is displayed on the Status Line.

STATUS MESSAGES

Status messages will be much like those displayed at

the chiller panel. Explanation of these displays will be

outlined in the Installation Manual for each specic

chiller. Subtle differences may be noted in the exact

wording displayed versus the display which is shown

on the chiller panel. An example of this is apparent

in the anti-recycle and anti-coincidence timers. In

the case of these messages, the chiller control panel

indicates actual time left on the timers. The OptiView

Remote Control Center will only indicate that the

timers are “Active”.

The new message “Loss of Communications” indicates

that the communications link between the chiller

control panel and the OptiView Remote Control Center

has been lost. This loss of communications is normally

a result of disconnecting the RS-485 communications

cable between the two panels or the loss of power to

the chiller control panel.

If communications is lost and not re-established, local

chiller setpoints will command chiller control after

5 minutes.

In addition to the chiller status messages there are

the Optiview Remote Control Center general status

messages that are displayed on a single line on the

Home Screen for each chiller. See the description of

the Home Screen in this manual.

SAFETY SHUTDOWN MESSAGE

“WATCHDOG – SOFTWARE REBOOT”

The Microboard’s software Watchdog initiated a

Microprocessor reset because it detected that a portion

of the chiller operating Program was not being executed.

The result of this reset is a Safety shutdown and

re-initialization of the Program. This is generally

indicative of a severe electrical power disturbance

or impending Microboard Failure. The chiller can be

started after the COMPRESSOR switch is placed in

the Stop-Reset (O) position.

Operation

FORM 50.40-OM2

59YORK INTERNATIONAL

FIG. 27 – PRINTERS

23887A

OKIDATA MICROLINE 184

23889A

WEIGH-TRONIX

SEIKO DPU-414

00085VIP

SECTION 4 – PRINTERS

YORK INTERNATIONAL60

PRINTERS

A printer can be connected to the OptiView Remote

Control Center’s Microboard to print the following

reports. The screen from which each report can be

generated is listed in parenthesis.

• Operating Data - Present system parameters

(Unit)

• History - System parameters at the time of the

last fault while running and last saved faults

(History)

The printer can be permanently connected to the Remote

Control Center or connected as required to produce a

report. If permanently connected, a DATA LOGGING

feature can produce a Status report automatically,

beginning at an Operator selected start time and occurring

at an Operator selected interval thereafter.

The following gures are examples of the different

print reports.

• Figure 28 - Operating Data

• Figure 29 - History (Header)

PRINTERS

The following Printers can be used. Printers must be

equipped with an RS-232 Serial interface.

• Okidata –

Models: 182,182 turbo, 184 turbo

Dimensions: 14 in. wide x 10.5 in. deep

Paper: 8.5 in. wide

Type: Dot matrix impact

• Weigh-Tronix –

Models: 2600, 1220

Dimensions: 2.3 in. wide x 2.8 in. deep

Paper: 2.25 in. wide

Type: Dot matrix impact

• Seiko –

Model: DPU414-30B (Power supply PW4007-U

I required)

Dimensions: 6.3 in. wide x 6.7 in. deep

Paper: 4.4 in. wide

Type: Thermal

Purchase: Contact your local

YORK Service Ofce

The OptiView Remote Control Center provides the

required formatting control codes for the printers above

when the printer is selected on the PRINTER Screen

in the instructions below. These codes are transmitted

through the serial interface to the printer to provide a

proper print format. Different printers require different

formatting control codes. Other printers might provide

proper operation when connected to the OptiView

Remote Control Center. However, the print format

may not be correct or as desired. Proceed with caution

and use the following guidelines if an unlisted printer

is selected:

1. All must be capable of RS-232 Serial communications.

2. Primary differences between printers involve the

formatting control codes required by the printer.

These codes are sent from the Control Center to

the printer. For example, Weigh-Tronix printers

require a control code to select 40 column width.

This same code is interpreted by the Okidata printer

as an instruction to print wide characters. In some

instances, a printer will ignore a code it cannot

interpret.

3. The OptiView Remote Control Center requires

a busy signal from the printer when the printer

receive buffer is full. This causes the OptiView

Remote Control Center to momentarily terminate

data transmission until the printer can accept more

data. The busy signal polarity must be asserted

low when busy.

PRINTER CONNECTIONS

Connect the printers to the Control Center Microboard as

follows. Only one printer can be connected at a time.

• OKIDATA 182, 182 turbo, 184 turbo

Microboard Printer Function

J2-4 pin 3 Tx (data to printer)

J2-2 pin 11 DSR (busy signal from printer)

J2-9 pin 7 Gnd

Cabinet shield

• WEIGH-TRONIX

Microboard Printer Function

J2-4 pin 2 Tx (data to printer)

J2-2 pin 5 DSR (busy signal from printer)

J2-9 pin 7 Gnd

Cabinet shield

Printers

FORM 50.40-OM2

61YORK INTERNATIONAL

• SEIKO

Microboard Printer Function

J2-4 pin 3 Tx (data to printer)

J2-2 pin 8 DSR (busy signal from printer)

J2-9 pin 5 Gnd

Cabinet shield

Hardware required:

Cable – #18 AWG stranded 50ft. maximum length.

Connectors –

- Microboard: None. Strip 1/4" insulation from wire

and insert into screw terminal block.

- Printers: Okidata - 25 pin plug DB-25P or equiva-

lent; Shell DB-C2-J9 or equivalent. Weigh-Tronix

- Same as Okidata. Cable assembly available from

Weigh-Tronix. Seiko - 9-Pin D-type Subminiature

(DB-9 pin male).

PRINTER SETUP

The selected printer must be congured as follows.

Refer to manual provided by Printer manufacturer with

respective Printer.

• OKIDATA 182, 182 turbo, 184 turbo Printer

CONTROL BOARD Switch settings:

SW1 - on Unslashed 0

2 - off Unslashed 0

3 - off Unslashed 0

4 - off Form Length 11 in.

5 - on Form Length 11 in.

6 - off Auto Line Feed off

7 - on 8 bit data

8 - off Enable front panel

If equipped with a SUPER SPEED serial Board:

SW1-1 - on Odd or even parity

1-2 - on No parity

1-3 - on 8 bit data

1-4 - on Protocol ready/busy

1-5 - on Test select

1-6 - on Print mode

1-7 - off SDD(-) pin 11

1-8 - on SDD(-) pin 11

2-1 - on 1200 Baud*

2-2 - on 1200 Baud*

2-3 - off 1200 Baud*

2-4 - off DSR active

2-5 - on Buffer threshold 32 bytes

2-6 - on Busy signal 200ms

2-7 - on DTR space after power on

2-8 - not used

If equipped with HIGH SPEED serial board:

SW1 - off (-) Low when busy

2 - off 1200 Baud*

3 - off 1200 Baud*

4 - on 1200 Baud*

5 - not used

6 - off no parity

7 - off Pin 20 & pin 11 act as busy line

• WEIGH-TRONIX Printer

- IMP-24 Model 2600

SW1 - off 1200 Baud*

2 - on 1200 Baud*

Model 1220

- Congure Menu

Baud= 1200

Data Bits = 8

Stop Bits = 1

Hshake = Busy-Line

Cols = 32

Invert = No

Font = 5 x 8

Mag = None

- Custom Menu

Auto Seq = No

Zero = 0

Pound sign = #

_(Underscore)

Busy invert = no

Online/ofine = yes

Ext Ch Set = no

Print ready = yes

Set Clock = not used

Reset Seq = not used

• SEIKO

DipSW1-1 = off Input-Serial

1-2 = on Printing speed high

1-3 = on Auto loading - on

1-4 = off Auto LF - off

1-5 = on Setting Command - Enable

1-6 = off Printing density - 100%

1-7 = on Printing density - 100%

1-8 = on Printing, density - 100%

YORK INTERNATIONAL62

DipSW 2-1= on Printing Columns - 40

2-2 = on User Font Back-up - on

2-3 = on Character Select - normal

2-4 = off Zero - slash

2-5 = on International character set -

American

2-6 = on International character set -

American

2-7 = on International character set -

American

2-8 = off International character set -

American

DipSW 3-1= on Data length - 8 bits

3-2 = on Parity Setting - no

3-3 = on Parity condition - odd

3-4 = on Busy control - H/W busy

3-5 = on Baud rate select - 1200*

3-6 = off Baud rate select - 1200*

3-7 = on Baud rate select - 1200*

3-8 = off Baud rate select - 1200*

* Settings shown for 1200 Baud. Other Baud rates can

be selected. Refer to Printer manufacturer’s manual

supplied with Printer.

OPTIVIEW REMOTE CONTROL CENTER SETUP

Number of Units Connected

Using the Setpoints Screen, enter the number of chiller

units to communicate with. The identication number

of the chiller unit which is setup at the unit’s control

panel can not exceed this number. The identication

number will appear at the top of each report.

Printer Setup

Using the PRINTER Screen, the OptiView Remote

Control Center must be congured to transmit data in

the same format as the Printer is congured to receive

the data. The following values must be entered.

• Baud Rate - Set as desired. Value selected must be

the same as Printer conguration above.

• Data Bits - 8

• Parity - None

• Stop Bits - 1

Printer Type

Using the PRINTER Screen, the actual Printer type

connected to the OptiView Remote Control Center

must be entered. Selection determines the control codes

that are sent to the Printer. These codes determine

such things as lines per inch, character width and

general formatting. Available selections are: Okidata,

Weigh-Tronix and Seiko.

Automatic Data Logging

If automatic data logging is desired, a Status Report

can be automatically printed at a specied interval

beginning at a specified time, using the PRINTER

Screen. The interval is programmable over the range of

1 minute to 1440 minutes in 1 minute increments. The

rst print will occur at the programmed START time

and occur at the programmed OUTPUT INTERVAL

thereafter. The time remaining until the next print is

displayed on the PRINTER Screen.

• Automatic Printer Logging - Enables and disables

automatic data logging

• Log Start Time - Enter the time the rst print is

desired.

• Log Unit Selected - Select a unit or all units to

print logs of.

• Output Interval - Enter the desired interval between

prints.

Pressing the Print button from the Unit Screen allows

the operator to obtain a printout of current system

operating parameters for the currently selected unit.

A sample operating data printout for a YCAS chiller

is shown following.

Printers

FORM 50.40-OM2

63YORK INTERNATIONAL

FIG. 28 – OPERATING DATA PRINTOUT EXAMPLE (YCAS CHILLER)

York International Corporation

Unit X Status

X Comp Screw

2:04PM 18 JUN 01

System 1 No Cooling Load

System 2 Compressor Running

System 3 No Cooling Load

System 4 Compressor Running

Options

Chilled Liquid Type = Water

Ambient Control Mode = Standard

Refrigerant Type = R-22

Program Values

Current Limit Setpoint = 100 %

Local/Remote Control Mode = Remote

Unit Data

Leaving Chilled Liquid Temperature = 49.0 °F

Return Chilled Liquid Temperature = 58.2 °F

Leaving Chilled Liquid Setpoint = 20.0 °F

Control Range = 2.0 °F

Ambient Temerature = 74.8 °F

Lead System = 2

Evaporator Pump Contact = On

Evaporator Heater = Off

Software Version = C.ACS.09.03

System 1 Data

System Run = Off

System Run Time = 0 Min

Motor Current (%FLA) = 0 %

Suction Pressure = 125.4 Psig

Discharge Pressure = 131.3 Psig

Oil Pressure = 130.6 Psig

Suction Temperature = 68.4 °F

Discharge Temperature = 68.8 °F

Oil Temperature = 68.8 °F

Saturated Suction Temp = 71.8 °F

Suction Superheat = 3.4 °F

Saturated Discharge Temp = 74.5 °F

Discharge Superheat = 6.3 °F

Slide Valve Step = 0

Cooler Inlet Refrig Temp = 44.6 °F

Liquid Line Solenoid = On

Economizer Solenoid = Off

Condenser Fan Stage = 0

Compressor Heater = On

System 2 Data

System Run = On

System Run Time = 15 Min

Motor Current (%FLA) = 87 %

Suction Pressure = 57.2 Psig

Discharge Pressure = 233.1 Psig

Oil Pressure = 218.0 Psig

Suction Temperature = 42.9 °F

Discharge Temperature = 145.5 °F

Oil Temperature = 102.8 °F

Saturated Suction Temp = 31.7 °F

Suction Superheat = 11.2 °F

Saturated Discharge Temp = 112.1 °F

Discharge Superheat = 33.4 °F

Slide Valve Step = 70

Cooler Inlet Refrig Temp = 23.6 °F

Liquid Line Solenoid = On

Economizer Solenoid = On

Condenser Fan Stage = 3

Compressor Heater = Off

System 3 Data

System Run = Off

System Run Time = 0 Min

Motor Current (%FLA) = 0 %

Suction Pressure = 125.4 Psig

Discharge Pressure = 131.3 Psig

Oil Pressure = 130.6 Psig

Suction Temperature = 68.4 °F

Discharge Temperature = 68.8 °F

Oil Temperature = 68.8 °F

Saturated Suction Temp = 71.8 °F

Suction Superheat = 3.4 °F

Saturated Discharge Temp = 74.5 °F

Discharge Superheat = 6.3 °F

Slide Valve Step = 0

Cooler Inlet Refrig Temp = 44.6 °F

Liquid Line Solenoid = Off

Economizer Solenoid = Off

Condenser Fan Stage = 0

Compressor Heater = On

YORK INTERNATIONAL64

FIG. 28 – CONTINUED

York International Corporation

Unit X Status

X Comp Screw

2:04PM 18 JUN 01

System 1 No Cooling Load

System 2 Compressor Running

System 3 No Cooling Load

System 4 Compressor Running

Options

Liquid Line Solenoid = On

Economizer Solenoid = Off

Condenser Fan Stage = 0

Compressor Heater = On

System 2 Data

System Run = On

System Run Time = 15 Min

Motor Current (%FLA) = 87 %

Suction Pressure = 57.2 Psig

Discharge Pressure = 233.1 Psig

Oil Pressure = 218.0 Psig

Suction Temperature = 42.9 °F

Discharge Temperature = 145.5 °F

Oil Temperature = 102.8 °F

Saturated Suction Temp = 31.7 °F

Suction Superheat = 11.2 °F

Saturated Discharge Temp = 112.1 °F

Discharge Superheat = 33.4 °F

Slide Valve Step = 70

The history printout is similar to the operational data

printout shown previously. The differences are in

the header and the schedule information. The daily

schedule is not printed for a history print. One example

history buffer header printout is shown following. The

data part of the printout will be exactly the same as the

operating data printout.

York International Corporation

Unit X Safety Shutdown Number X

X Comp Screw

2:04PM 18 JUN 01

System 1 High Dsch Press Shutdown

System 2 No Faults

System 3 No Faults

System 4 No Faults

FIG. 29 – HISTORY HEADER PRINTOUT

EXAMPLE (YCAS CHILLER)

Printers

FORM 50.40-OM2

65YORK INTERNATIONAL

This document explains the operation of the printed

circuit boards and major components of the OptiView

Remote Control Center to a level that allows a Service

Technician to troubleshoot and locate the source of

a problem.

The overall system architecture is described and

illustrated with block diagrams. This describes the

general function of each component and provides the

system interface and signal ow. The function of each

component and signal ow between components must

be understood before effective troubleshooting can

commence.

The operation of each printed circuit board is described

and illustrated with a block diagram that is a simplied

representation of board circuitry. The expected voltage

level at all inputs and outputs of each board for any

operating condition is provided.

Included in this document are procedures that have to

be performed at commissioning or during service. They

should not be performed by anyone other than a Service

Technician. For example, calibration procedures have

to be performed or veried at commissioning or when

a component is replaced. Since the operating program

supplied in each OptiView Remote Control Center is

universal to all applications, special setpoints, program

jumpers and program switches are required to congure

the OptiView Remote Control Center for this locations

operating conditions.

SECTION 5 – SERVICE

INTRODUCTION

A System Commissioning Checklist is provided as

reference of items to be performed during control panel

commissioning.

Diagnostic Routines allow service analysis of the

following functions:

• Display

• Analog inputs

• Dip switches and jumpers

Before beginning any troubleshooting, observe all

display messages. The conditions required to produce

the message must be clearly understood before

proceeding. (If this is not heeded, much time will

be wasted). Armed with a knowledge of the overall

system architecture and the function of each printed

circuit board and signal ow provided by this manual,

proceed with the appropriate Wiring Diagram listed

above to trace the problem through the system. Use the

Diagnostic Routines where appropriate.

YORK INTERNATIONAL66

SYSTEM ARCHITECTURE

(REFER TO FIG. 28)

The OptiView Remote Control Center (RCC) performs

the following functions:

• Displays chiller operating conditions, alarms,

shutdown messages and history data.

• Accepts operator-programmed setpoints.

• Provides chiller operating data and status to remote

devices via serial communications.

• Allows real-time data and history data to be printed

on an optional printer.

The RCC is a microprocessor based control system

that receives analog and serial data inputs and controls

serial data outputs per instructions in the operating

program. A panel mounted display and touch-sensitive

keypad permit remote operation.

In some applications, overall system temperatures

are sensed by thermistors connected to the Remote

Control Center. The output of each thermistor is a

DC voltage that is analogous to the temperature it is

sensing. Typical output voltage range of both is 0.5

to 4.5VDC. These are analog inputs to the Remote

Control Center.

Serial Data is transmitted to and received from devices

in RS-232, RS-485 and TX/RX (opto-couple) form.

All OptiView Remote Control Centers contain the

following standard components:

• Microboard

• Keypad

• Display

• Power Supply

Figure 33 is a Remote Control Center block diagram

of the standard components.

The microprocessor and all supporting logic circuits,

along with the memory devices containing the operating

program, reside on the Microboard. All remote control

decisions are made here. In some applications it receives

analog inputs from devices. The analog inputs are

connected directly to the Microboard.

A front panel-mounted Keypad allows Operator and

Service Technician user interface. Membrane keys are

used to display chiller and system parameters, enter

setpoints and perform chiller and Remote Control

Center diagnostics.

A front panel mounted liquid crystal Display allows

graphic animated display of the connected chiller units,

chiller unit subsystems and system parameters. The

chiller and working components of the chiller are

displayed, along with chiller operating pressures and

temperatures. The Keypad is used to select displays

showing increasing levels of detail of chiller working

components.

A self-contained Power Supply supplies the necessary

DC voltages for all the components within the Remote

Control Center.

Serial data interface to the YORK ISN Building

Automation System is through the J12 connector.

Service

FORM 50.40-OM2

67YORK INTERNATIONAL

FIG. 30 – CONTROL CENTER

LD06742

POWER

SUPPLY

MICRO BOARD

KEYPAD

DISPLAY

INTERFACE

BOARD

LIQUID

CRYSTAL

DISPLAY

LAMP BACKLIGHT

INVERTER

BOARD

LAMP

CONTROL

ROW IN

COLUMN OUT

DISPLAY DATA

+12 / +5 VDC

RS-232 / RS-485 SERIAL DATA

YORK INTERNATIONAL68

MICROBOARD

(REFER TO FIG. 31 - 36)

The Microboard contains the operating software

(Program), microprocessor (Micro), and supporting

circuits for the Micro.

The Program is a set of instructions to control remote

chillers and the display. It also contains the Display

messages and screens. It is stored in a memory device

called a ash memory card. This is a type of nonvolatile

memory that can be read from or written to, but requires

the locations to be erased before they are written to. With

the exception of a write/read sequence that occurs during

the Boot-up process explained below, this device is used

primarily as read-only in this application. A write protect

switch is located on the left edge of the card as shown in

Fig. 32. It must be placed in the “Write Enabled” position

in order to allow successful Boot-up. The card is located

in socket location U46 (Ref. Fig. 31). It connects to the

Board via an Elastomeric connector that is a silicon rubber

strip embedded with silver conductors. The Card can

be removed from its socket by using the thumb to press

down on the socket’s plastic tension spring. The card

is installed by inserting it into the socket/holder and

pressing on the surface of the Card until it snaps into

place. The Memory card is a replaceable component.

Refer to the YORK Renewal Parts List. The version of

the Memory card is an alphanumeric code that represents

the application and revision level. The version is printed

on a label adhered to the memory card’s surface. The

version code is as follows:

The Micro monitors and controls the chiller by reading

and executing the Program instructions in a sequence

determined by the Program. Under Program control, the

Micro communicates with the chillers via RS-485 serial

communications to determine the operating conditions.

As operating conditions require, status messages are

retrieved and displayed. The Keypad is read as Digital

Inputs. When an operator presses a key to request a

display, the Micro interprets the request, retrieves the

display from the Program and displays it. The Program

assembles data in the correct format for transmission

through the Serial Data Ports to the chiller(s) and

peripheral devices. The Program also instructs the Micro

to respond to requests from peripheral devices for serial

data transmissions.

The Mux (multiplexer) is a switching device that only

allows one analog input through at a time. The inputs

are selected sequentially by the Micro per Program

instructions.

The A/D Converter converts each analog input to a

12-bit word. In this form, the values can be stored in

memory devices, compared to values in the Program,

transmitted through Serial Ports or sent to the Display

Controller for display. Control signals to start conversion

process are from the Micro via the FPGA.

The Watchdog circuit monitors the +5VDC supply from

the Power Supply to determine when a power failure is

occurring. Just prior to the supply decreasing to a level

where the Micro and supporting circuits can no longer

operate, it applies a reset signal to the Micro. The Micro

responds by shutting down the remote control center and

retrieving the Power Failure message from the Program

and sending it to the Display Controller for display.

Similarly, when power is first applied after a power

failure, it maintains the Micro in a reset state until the

+5VDC has returned to a sufcient level. The Watchdog

circuit also assures that all the Program instructions are

being performed and that the Program has not latched-up,

bypassing important safety thresholds. If the Program

has latched-up, the Micro displays WATCHDOG –

SOFTWARE REBOOT message.

The Program Jumpers (Table 2) and Program Switches

(Table 3) are used to alter the Program operation or

congure the Microboard hardware for specic operation.

This allows the Program and Microboard to be universal

for all applications. Refer to Table 2 and 3 for the function

of each jumper and switch. The position of some can be

determined and set by the Service Technician to meet the

desired operation. The position of others is dictated by the

size, type or style of certain Control Center components

and thus the position is determined by the YORK Factory.

The required position of each is listed in these tables. The

Program Jumpers are wire bridges that are either left in

place or cut. The Program Switches are miniature switches

that are placed in either the ON or OFF position.

C. RCC. 01. XX.

Revision level. Increments 00, 01 etc.

Product Code for OptiView RCC

Remote Control Center

Commercial

Service

FORM 50.40-OM2

69YORK INTERNATIONAL

The DRAM (dynamic random access memory) is a

non battery-backed memory device. The Micro stores

data here temporarily for further processing. Data

in this device is lost during power failures. DRAM

differs from RAM in that DRAM must be periodically

refreshed in circuit.

The BIOS EPROM (basic input/output system erasable

programmable read only memory) is a memory device

that contains the bootstrap or power-up program. It

is located in socket location U45. This EPROM is

replaceable. Refer to the YORK Renewal Parts List.

The EPROM version is an alphanumeric code that

represents the application and revision level. The

version is printed on a label adhered to the EPROM’s

surface. The version code is as follows:

When power is applied to the Control Center following

a power failure, the Micro executes the instructions

in the BIOS EPROM program to initialize, congure

and start operation of certain Microboard components

before the main program (stored in the Flash Memory

Card) is started. Depending upon the application, the

Microboard could be equipped with an EPROM that

has either 128K, 256K or 512K capacity. Microboard

Program Jumper JP38 must be positioned according to

the actual EPROM installed. Refer to Table 2 (Program

Jumpers). There are 5 steps to the boot-up process.

During the boot-up process, there is a visual indication

as each step is performed, followed by a Pass/Fail

status of the step. On the Microboard, a green LED

ashes to indicate the step was successful. If a step

is unsuccessful, a red LED ashes and the Boot-up

process terminates. The execution and Pass/Fail status

of steps 3 through 5 are displayed on a white Keypad

Display Screen as they are performed. This white

display screen also lists the BIOS EPROM Version.

The steps of the Boot-up process are as follows. Also,

below is listed the LED activity associated with each

step.

BOOT-UP STEP AND DESCRIPTION

1. First initiate table complete.

Registers in the Micro are congured to allow it to

perform basic memory read/write functions.

2. FPGA conguration.

The Field Programmable Gate Array (FPGA) is

congured to process Digital Inputs and Outputs.

3. Mini-card signature test.

A location in the Flash Memory Card that contains

a code identifying the Manufacturer is compared to

other locations that contain the manufacturer’s name.

If these values are the same, it is pass. If they are

different, it is fail.

4. Mini-card checksum.

The Flash Memory Card checksum is calculated and

compared to the checksum value that is stored in the

Card at the time the Card was initially programmed

at the YORK factory. If both values are the same, it is

considered pass. If the calculated value is different than

the stored value, it is considered fail.

5. BRAM quick test.

Test data is written to and then read from several

memory locations to verify BRAM operation.

LED INDICATORS

When power is applied to the Control Center, both

the red and green LED’s simultaneously illuminate

for 1 second, then the Boot-up process begins in the

following sequence (Note: While one LED ashes the

other is off.). When all steps have been completed, both

the green and the red LED’s illuminate and remain

illuminated.

STEP PASS FAIL

1 Green on, Red off Watchdog will

initiate a re-boot.

2 Green ash once Boot-up process halts.

One red ash repeating

3 Green ash once Boot-up process halts.

Two red ashes repeating

4 Green ash once Boot-up process halts.

Three red ashes repeating

5 Green ash once Boot-up process halts.

Four red ashes repeating

C. MLM. 00. XX.

Revision level. Increments 01, 02 etc.

OptiView BIOS EPROM

MILLENNIUM

Commercial

YORK INTERNATIONAL70

The BRAM (battery backed random access memory) is

a memory device that contains a battery that preserves

the data during power failures. It is a replaceable part.

Refer to the YORK Renewal Parts List. It is located

in socket location U52. The Micro stores the setpoints

programmed by the Operator or Service Technician,

History Data and other data that requires preservation,

in this device. Also, the day of week, time of day and

calendar date time-keeping are done here.

The keypad is a matrix of conductors arranged in rows

and columns (ref. Fig. 45 & 46). There are 4 rows

and 8 columns. When a key is pressed, the conductors

are pressed together at that point, creating continuity

between that row conductor and the column conductor.

The Keypad is read by applying a logic low to a row

while leaving +5VDC pullup on all the other rows. The

Micro then reads the 8 columns. If any column has a

logic low on it, the key corresponding to that coordinate

(row, column) is being pressed. The Micro reads the

entire Keypad by repeating this routine beginning

with row 1 and ending with row 4. The entire Keypad

is read every Program cycle. The Micro selects the

MUX inputs (Microboard J7, J8, J9) for input to the

A/D Converter by writing sequential addresses to the

FPGA. The FPGA holds each address until a new one

is received from the Micro. As each address is applied

to the MUX, the input corresponding to that address

is passed through the MUX to the A/D Converter.

The A/D Converter will convert the analog value to a

digital word when the Micro writes a “start conversion”

pulse to the FPGA. The FPGA passes this to the A/D

Converter. The Micro allows access to the PC-104

port (Microboard J16, J17) by writing an enable

pulse to the FPGA. The FPGA applies this to the data

transceiver, allowing data to be output to or input from

the PC-104 Port.

To provide flexibility for future Analog Inputs (to

Microboard J7), 2 analog inputs can be congured for either

0-10VDC or 4-20mA, Transducer or Thermistor inputs

using Program Jumpers JP21 and JP22. The position of the

jumper determines which type of input can be connected.

Refer to Fig. 36 and Table 2, “Program Jumpers”.

These inputs are for future YORK

Factory expansion use only. They

are not general application spare

inputs that will support arbitrarily

installed devices. Devices CANNOT

be connected to these inputs until

the program has been modified to

read and process the input. Unless

YORK documentation shows a device

connected to the input with a dened

function, the input cannot be used.

The Microboard receives 2 supply voltages (Microboard

J1) from the Power Supply; +12VDC, +5VDC and

Ground. The +12VDC and +5VDC are input to Voltage

Regulators to derive other regulated voltages. The

+5VDC is input to a +3.3VDC regulator. The output is

a 3.3VDC regulated voltage. The +12VDC is input to

a 5VDC regulator. The output of this regulator powers

only the Analog circuits. This includes the MUX, A/D

converter, and Thermistors. As depicted on Fig. 33,

these voltages can be monitored at Test Posts TP1

through TP6.

The Microboard is equipped with 5 Serial Data Ports

(ref. Fig. 35). Connector J2 is shared with both COM

1 and COM 4B. Each Port is dedicated for a specic

function as follows:

a. COM 1 (J2) - RS-232. Printer.

b. COM 2 (J13) - RS-232. Not Used.

c. COM 3 (J12) - RS-485. Chiller panel communica-

tions .

d. COM 4 (4A-J11), (4B-J2) - This port is actually two

ports. However, they cannot be used simultaneously;

only one of these ports can be connected to a device

at a time. The position of Microboard Program

Jumper J27 determines which port can be used

(refer to Table 2). COM 4A (J11) is an RS-485

port that is used for Multi-Unit Communications.

COM 4B (J2) is an RS-232 port that is used for

MicroGateway.

e. COM 5 (J15) – Not Used.

Service

FORM 50.40-OM2

71YORK INTERNATIONAL

COM 1 is connected directly to the Micro. COM

2 through 5 are connected directly to the UART

(Universal Asynchronous Receive Transmit). The

UART converts the parallel data to serial form for

transmission to the peripheral device and converts the

incoming serial data to parallel form for use by the

Micro. It also generates and processes control signals

for the Modem communications (DTR, CTS, DSR,

RTS). Under Program control, the Micro instructs the

UART of the desired data transmission Baud rate. A

crystal oscillator provides the frequency reference.

Each port is equipped with two LED’S; a red one

indicates when data is being transmitted to the remote

device and a green one indicates when data is being

received from the remote device. The RS-232 output

voltages are industry standard +3 to +15VDC, with

+9VDC typical. The RS-485 output voltages are

industry standard +1.5 to +5VDC, with +2.5VDC

typical. A loopback diagnostic test can be performed

on each serial port. This test permits verication of

the data transmitted from the serial port. Refer to the

“Serial Inputs / Outputs Tests” description in this book

for details of these tests. The graphic screens that are

displayed on the Liquid Crystal Display are created

from preformed graphics and messages that are stored

in the Program (FLASH Memory Card), and real-time

system operating parameters, such as temperatures.

The graphics, message and number data are in the form

of digital words. The Display Controller converts this

data into display drive signals and sends them to the

Display from Microboard J5. The Display has 307,200

pixels arranged in a 640 columns x 480 rows matrix

conguration. Each pixel consists of 3 windows; red,

green and blue, through which a variable amount of

light from the Display backlight is permitted to pass

through the front of the display. Imbedded in each

window of the pixel is a transistor, the conduction of

which determines the amount of light that will pass.

The drive signal determines the amount of conduction

of the transistor and therefore the amount of light

passed through the window. The overall pixel color

becomes a result of the gradient of red, green and blue

light allowed to pass. The drive signal for each pixel is

an 18 bit binary word; 6 for each of the 3 colors, red,

green and blue. The greater the binary value, the greater

the amount of light permitted to pass. The pixels are

driven sequentially from left to right, beginning with

the top row. To coordinate the drive signals and assure

the pixels in each row are driven sequentially from

left to right and the columns are driven from top to

bottom, each drive signal contains a horizontal and

vertical sync signal.

The Display DRAM is a memory device that supports

the operation of the display controller. This device

could be either of two types; FPM (fast page mode) or

EDO (extended data out) type. Program Jumper JP6

must be positioned according to the type of DRAM

device installed in the Microboard; JP6 in - EDO,

out - FPM. Refer to Table 2, “Program Jumpers”.

Depending upon the requirement, there could be one

or two DRAM devices installed in the Microboard.

If the design requires only one DRAM, it is installed

in socket U27. If an additional one is required, it is

installed in socket U25.

During the power-up sequence, the program in the

BIOS EPROM reads Program Jumper JP6 to determine

the type of Display DRAM installed (as explained

above). It also reads wire jumpers PID0 through PID3

(via Microboard J5) on the Display Interface Board

to determine the manufacturer of the display (refer to

description of Display Interface Board). Each display

manufacturer requires a slightly different control.

The program in the BIOS EPROM then congures

the Display Controller for operation with the actual

display that is present.

Different Display manufacturers can require different

supply and control voltages for their displays and

backlights. Program Jumpers JP 2 through 4 and 5

through 8 must be congured to provide the required

supply and control voltages to the display and backlight

control. Table 2 lists the required Program Jumper

conguration for the Display. Also, a label attached to

the Display mounting plate lists the required Program

Jumper conguration for that particular Display.

The power supply voltage that operates the Display

is provided by the Microboard J5. The position of

Program Jumper JP2 determines whether this supply

voltage is +5VDC or +3.3VDC. The Display requires a

specic power-up and power-off sequencing to prevent

damage. During power-up, the supply voltage must

be applied to the Display before the drive signals are

applied. Similarly, during power-off sequencing, the

display drive signals must be removed prior to removing

the supply voltage. The Display Controller applies the

supply voltage and data drive signals to the Display in

the proper sequence. The Display Controller controls

the Display Backlight by applying control signals

(from Microboard J6) to the Backlight Inverter Board.

The Backlight Inverter Board converts low voltage

DC (+12VDC or +5VDC, depending on position of

YORK INTERNATIONAL72

Program Jumper JP5) to high voltage AC (500 to

1500VAC). This high voltage AC is applied to the lamp

to cause it to illuminate. The Backlight is turned on

and off with the “Enable Backlight” (J6-5) signal. The

position of Program Jumper JP4 determines whether

this is a +12VDC or +5VDC signal. In some displays,

the Backlight turns on when this signal transitions

from low to high; others turn on when it transitions

from high to low. The position of Program Jumper

JP3 determines the transition that will occur when the

Display Controller outputs the “Enable Backlight”

signal. Program Jumper JP3 must be positioned accord-

ing to the Display manufacturer’s requirement.

Under Program control, the Display Controller controls

the Backlight brightness via the Lamp Dimmer circuit.

In order to extend the life of the backlight lamp, the lamp

brightness is driven to 50% brightness after 10 minutes

of Keypad inactivity. At this brightness level, the Display

can still be read. Subsequently, when Keypad activity is

detected (i.e. a Keypad key is pressed), the lamp is driven

back to full brightness (100% brightness). Some display

manufacturers require a variable voltage to vary the

brightness; others require a variable resistance. Program

Jumpers JP7 and JP8 allow either method to be used.

The Lamp Dimmer is an integrated circuit that is

the electrical equivalent of a 10K ohm potentiometer

with 100 positions or steps (ref. Fig. 34). The Display

Controller controls the position of the potentiometer. The

Lamp Dimmer varies the brightness of the Backlight

by applying either a variable voltage (0-5.0VDC) or

a variable resistance (0-10K ohms), to the Backlight

Inverter Board. If Program Jumpers JP7 and JP8 are

installed, the Lamp Dimmer output is a variable voltage;

if both are removed, the output is a variable resistance.

The Lamp Dimmer outputs “Brightness Control Wiper”

(J6-7) and “Brightness Control -“ (J6-8) to the Backlight

Inverter Board. If configured for variable voltage

output, the voltage between J6-7 and J6-8 can be varied

from 0 (100% brightness) to 5.0VDC (0% brightness). If

congured for variable resistance, the resistance between

J6-7 and J6-8 would vary from 0 ohms (0% brightness)

to 10K ohms (100% brightness).

The PC-104 Port (J16 & J17) is an industry standard

arrangement of two connectors that allows the stacking

of 3.6 x 3.8 inch printed circuit boards (PC-104

Modules) on the Microboard. The circuits on these

boards have access to the Microboard’s address/data bus,

and therefore become an extension of the Microboard.

This provides expansion of the Microboard’s capabili-

ties without redesigning or changing the size of the

Microboard. PC-104 Modules are not used in all

Remote Control Center applications.

System temperatures, in the form of analog DC

voltages from temperature thermistors, are input to

the MUX (multiplexers). Under Program control, the

Micro selects these values, one at a time, for input

to the Analog to Digital (A/D) converter. As each

one is selected, it is passed to the A/D Converter for

conversion to a 12-bit digital word that is then input in

parallel form to the Micro. The Micro stores each value

in the DRAM for display requests, further processing

or Serial Port transmission. Each value is also stored in

the BRAM for History data.

Service Replacement: Microboards are supplied as

Service Replacement parts without the following

components:

• BRAM (U52)

• Flash Memory Card (U46)

• BIOS EPROM (U45)

Upon receipt of the replacement Microboard, remove

these components from the Board being replaced

and install in the replacement Board. Although these

components have YORK Part Numbers as listed in

the Parts List and can be individually replaced, it is

recommended that these existing components be used

in the new Board since the BRAM memory device

contains all of the programmed setpoints.

Service

FORM 50.40-OM2

73YORK INTERNATIONAL

FIG. 31 – MICROBOARD

LD06743

FLASH

MEMORY

CARD

BIOS EPROM

BRAM

RS485

Driver

RS485

Driver

YORK INTERNATIONAL74

AUGAT

MEMORY CARD

RETAINER CLIP

PRESS DOWN

TO RELEASE CARD

ELASTOMERIC

CONNECTOR

FIG. 32 – FLASH MEMORY CARD

LD06745

LD06746

LD06744

MEMORY CARD SOCKET

MEMORY CARD -

TOP SURFACE

MEMORY CARD - BOTTOM SURFACE

MEMORY CARD - SIDE VIEW

TOP SURFACE

WRITE PROTECT SWITCH (OPTIONAL)

(MUST BE IN "ENABLED POSITION")

CINSCINS GND

VCC 3V/5V

KEY

ALIGNMENT

NOTCH

PAD 60

PAD 30

PAD 31

PAD 1

WRITE ENABLED

WRITE DISABLED

LD06747

Service

FORM 50.40-OM2

75YORK INTERNATIONAL

FPGA

MUX

A/D

CONVERTER

WATCH-

DOG

PROGRAM

SWITCHES

MICRO

DRAM DISPLAY

CONTROLLER

DRAM

FLASH

EPROM

BIOS

EPROM

BRAM XCVR PC-104

PORT

UART

INPUT

BUFFER

PROGRAM

JUMPERS

BACKLIGHT

CONTROL

DATA

BUS

XCVR

SERIAL DATA

PORT 1

DISPLAY INTERFACE

BOARD

BACKLIGHT INVERTER

BOARD

DIGITAL

INPUTS

DIGITAL

OUTPUTS

SERIAL

DATA PORTS

2 THROUGH 5

ANALOG

INPUTS

+5VDC REF

LVG CHILLED

WATER TEMP R25

R28

VOLTAGE

REG

VOLTAGE

REG

+ 12VDC

+ 5VDC

GND

TP2

TP1

TP4

TP3

+ 12VDC

+ 5VDC (ANALOG)

+ 5VDC (DIGITAL)

+ 3.3VDC

FROM

POWER

SUPPLY

FIG. 33 – MICROBOARD

LD06748

YORK INTERNATIONAL76

TABLE 2 – MICROBOARD PROGRAM JUMPERS

MICROBOARD PROGRAM JUMPERS

JP1 - Watchdog enable/disable. The position of this

jumper, in conjunction with Program switch SW

1 position 12 enables or disables the program

Watchdog protection.

Never disable the watchdog protec-

tion. Severe compressor or chiller

damage could result. The ability to

disable the watchdog protection is

provided for factory testing only!!!

IN - Watchdog protection enabled.

OUT - Permits Program switch SW1 position 12 to

enable or disable the program

Watchdog protection as follows:

Position 12 ON - Watchdog protection enabled

OFF - Watchdog protection disabled

JP2 - Display power and logic levels. Determines the

power supply voltage applied to the display.

Pins 1-2: +5VDC SHARP LQ10D367

Pins 2-3: +3.3VDC LG Semicon LP104V2

displays.

If this jumper is not correctly installed

the display could become damaged.

JP3 - Display backlight enable signal level polarity.

Jumper must be positioned according to the

voltage level required to turn on the Display

Backlight.

Pins 1-2: 0VDC (Not used)

Pins 2-3: +12VDC or +5VDC as determined

by position of JP4. SHARP LQ10D367 and LG

Semicon LP104V2 displays.

JP4 - Display backlight enable signal logic levels.

Determines the logic levels of the Backlight

enable signal.

Pins 1-2: +12VDC/0VD (Not used)

Pins 2-3:+5VDC/0VDC LG Semicon LP104V2

displays.

JP5 - Display backlight power. Determines the power

supply voltage applied to the Display Backlight

Inverter Board.

Pins 1-2: +12VDC. SHARP LQ10D367 and

LG Semicon LP104V2 displays.

Pins 2-3: +5VDC. (Not used)

JP6 - Display memory type. Jumper must be posi-

tioned according to type of RAM used for

display memory devices (U25 & U27).

IN - EDO: (extended data out) type. Jumper

should be IN.

OUT - FPM: (fast page mode) type. Not used

at this time.

JP7, JP8 - Display brightness control technique.

Determines whether the display brightness is

controlled by a variable voltage or variable

resistance.

IN: Variable voltage (0-5.0VDC). SHARP

LQ10D367 and LG Semicon LP104V2 displays.

OUT: Variable resistance. (Not used)

JP9 - COM 2 serial communications port. Congures

COM 4 port to be either RS-485 or RS-232.

Pins 1-2: RS-232

Pins 2-3: RS-485

JP10 - JP26 - Not used.

Service

FORM 50.40-OM2

77YORK INTERNATIONAL

JP27 - COM 4 serial communications port. Congures

COM 4 port to be either RS-485 for Multi-Unit

Communications (COM 4A) or RS-232 for

MicroGateway board (COM4B).

Pins 1-2: Enables port 4A. Allows an RS-485

connection to Microboard J11 for MultiUnit

Communications.

Pins 2-3: Enables port 4B. Allows an RS-232

connection to Microboard J2 for MicroGateway

communications.

JP28 - PC-104 Port interrupt assignment. Assigns

selected PC-104 interrupt request to PDRQ7 on

the microprocessor. Interrupt request selections

are silk screened on the Microboard adjacent to

the program jumper. Not used.

JP29 - PC-104 Port interrupt assignment. Assigns

selected PC-104 interrupt request to PDRQ6

on the microprocessor. Interrupt request selec-

tions are silk screened on the Microboard

adjacent to the program jumper. Future modem

application.

JP30 - PC-104 Port DMA assignment. Assigns selected

PC-104 DMA request to PDRQ0 on the micro-

processor. DMA request selections are silk

screened on the Microboard adjacent to the

program jumper. Not used.

JP31 - PC-104 Port DMA assignment. Assigns selected

PC-104 DMA request to PDRQ1 on the micro-

processor. DMA request selections are silk

screened on the Microboard adjacent to the

program jumper. Not used.

JP32 - PC-104 Port DMA acknowledge assignment.

Assigns selected PC-104 DMA acknowledge

to PDACK0 on the microprocessor. DMA

acknowledge selections are silk screened on the

Microboard adjacent to the program jumper.

Not used.

JP33 - PC-104 Port DMA acknowledge assignment.

Assigns selected PC-104 DMA acknowledge

to PDACK1 on the microprocessor. DMA

acknowledge selections are silk screened on the

Microboard adjacent to the program jumper.

Not used.

JP34, JP35, JP36, JP37 - Not Used

JP38 - BIOS EPROM U45 size. Jumper must be

positioned according to size of U45. Jumper is

a 10 Ohm resistor that is soldered to board. It

is not a shunt jumper.

IN: 512K

OUT: 128K or 256K. Should be OUT for

OptiView Remote Control Center applications.

JP39, JP40, JP41, JP42 - Not used.

YORK INTERNATIONAL78

5 - 11 Not Used

12 - Watchdog Protection -Used in conjunction with

Program Jumper JP1 (see above) to enable/disable

the program watchdog protection. With JP1

IN, this switch setting has no effect. With JP1

OUT, this switch setting determines whether the

watchdog protection is enabled or disabled.

NEVER disable the watchdog protec-

tion! Severe compressor or chiller

damage could result. The ability to dis-

able the watchdog protection is provided

for YORK factory testing only.

ON: Watchdog protection enabled.

OFF: Watchdog protection disabled.

SW1

1 - Simulator mode - When this switch is closed

or in the ON position, the RCC simulates the

data from 4 chillers and will not communicate

with any attached units.

ON: Simulator mode enabled. Used for dem-

onstration.

OFF: Simulator mode is disabled. The unit

must be powered on with the switch in this

position for the RCC to communicate with

attached units and operate normally.

2 - Not Used

3 - Not Used

4 - Diagnostics - Enables or disables software

diagnostics

ON: Enables software diagnostics. Disables

normal control center operation

OFF: Disables software diagnostics. Enables

normal control center operation.

TABLE 3 – MICROBOARD PROGRAM SWITCHES

NOTES:

1. J6-6 not connected (N.C.) to Backlight Inverter Board when display is manufactured by Sharp or NEC.

2. The position of Program Jumpers JP7 & JP8 determine the output at J6-7; In = Variable Voltage; Out = Variable Resistance. Refer to

Program Jumper Listing in Table 2 for applications.

3. Potentiometer is actually an integrated circuit that is the electrical equivalent of a 10K potentiometer.

FIG. 34 – MICROBOARD LAMP DIMMER CIRCUIT

BRIGHTNESS CONTROL (+) OR (N.C.)

BRIGHTNESS CONTROL (WIPER)

BRIGHTNESS CONTROL (-)

BACKLIGHT

INVERTER

BOARD

JP8

JP7

5.0 VDC

10 K

LD04054

Service

FORM 50.40-OM2

79YORK INTERNATIONAL

FIG. 35 – MICROBOARD SERIAL DATA COMMUNICATIONS PORTS

LD06749

NOTE:

1. Microboard Program Jumper JP27 determines whether COM 4A or 4B can be used. 1 & 2 - 4A, 2 & 3, 4B. Refer to Table 2.

MICRO

UART

COM 1

COM 4B

(NOTE 1)

COM 4A

(NOTE 1)

COM 2

COM 3

COM 5

OPTO-COUPLE

RS-485

RS-232

RS-485

RS-232

MICROGATEWAY

PRINTER

NOT USED

CONNECTION

TO CHILLER /

CONDENSING

CONTROL PANELS

NOT USED

J11

J13

J12

J15

COMMON

NOTE 2

+ 5VDC

GND

SHIELD

DCD

DSR

RTS

CTS

DTR

GND

+ 5VDC

GND

SHIELD

DTR

DSR

GTX

GRX

TX1 RX1

TX4 RX4

TX2 RX2

TX3 RX3

TX5 RX5

JP27

YORK INTERNATIONAL80

FIG. 36 – CONFIGURABLE ANALOG INPUTS

LD04636

NOTE:

1. Program Jumpers JP21 – JP24 must be positioned on pins 1-2 or 3-4 according to input signal type. Refer to Table 2.

NOT USED

0 10 VDC

4 - 20 MA

0-10 VDC

4 - 20 MA

MUX

47K

JP21

JP22

JP23

JP24

200

7.5 K

71.5 K

+5V

15 +5V

J22

0-10 VDC /

0 - 20 MA /

2-10 VDC

4 - 20 MA

0-10 VDC /

0 - 20 MA /

2-10 VDC

4 - 20 MA

Service

FORM 50.40-OM2

81YORK INTERNATIONAL

LIQUID CRYSTAL DISPLAY

(REFER TO FIG. 37 - 42)

A 10.4 inch color Liquid Crystal Display, along with

supporting components Display Interface Board and

Backlight Inverter Board are mounted on a plate that

is attached to the OptiView Control Center door. A clear

plexiglass faceplate prevents display surface damage.

System operating parameters are displayed on various

color graphic screens. The various display screens are

selected for display using the Keypad keys.

The Display provided in the OptiView RCC or from

YORK as a service replacement part, could be manufac-

tured by any of several approved manufacturers. Each

Display requires a specific Display Interface Board,

Backlight Inverter Board, Inverter Board interface cable

and Program command set. Therefore, Service replace-

ment Displays or supporting components cannot be

arbitrarily selected!!! As explained below, replacement

Displays are provided from YORK as kits to assure

compatibility of all components. Non-compatibility of

components will result in incorrect operation!!! Refer

to “Display Interface Board” and “Backlight Inverter

Board” descriptions that follow. The following displays

could be provided from YORK in new OptiView RCCs

or as replacement parts:

• LG SEMICON LP104V2

• SHARP LQ10D367

The YORK part numbers of the Display Interface Board,

Backlight Inverter Board and Inverter ribbon cable provided,

are listed on a label attached to the Display mounting plate.

These are the part numbers of the supporting components

that are compatible with the installed display. These

supporting components can be individually replaced.

However, if the Liquid Crystal Display fails, Display

replacement kit 331-02053-000 must be ordered as detailed

below. This kit contains a replacement Display and all

compatible supporting components.

The Display has 307,200 pixels arranged in a 640 columns

X 480 rows matrix conguration. Each pixel consists of

3 windows; red, green and blue, through which a variable

amount of light from the Display Backlight is permitted

to pass through the front of the display. Imbedded in

each window of the pixel is a transistor, the conduction

of which determines the amount of light that will pass

through the window. The conduction of each transistor

is controlled by a signal from the Display Controller on

the Microboard. The overall pixel color is a result of the

gradient of red, green and blue light allowed to pass.

Under Program control, the Display Controller on the

Microboard sends a drive signal for each pixel to create

the image on the display. Each pixel’s drive signal is an

18 bit binary word; 6 bits for each of the 3 colors, red

green and blue. The greater the binary value, the greater

the amount of light permitted to pass. The columns of

pixels are driven from left to right and the rows are

driven top to bottom. To coordinate the drive signals

and assure the columns are driven from left to right and

the rows are driven from top to bottom, each drive signal

contains a horizontal and vertical sync signal. The

Display Interface Board receives these display drive

signals from the Microboard J5 and applies them to the

Display at connector CN1. Refer to Fig. 43.

Although there are variations in control signal timing

between different display manufacturers, Fig. 38 depicts

typical control signals. Since these control signals occur

at rates greater than can be read with a Voltmeter, the

following description is for information only. There are

480 horizontal rows of pixels. Each row contains 640

3-window pixels. Beginning with the top row, the drive

signals are applied within each row, sequentially left

to right, beginning with the left most pixel and ending

with the right most pixel. The rows are driven from top

to bottom. The Vertical Sync (VSYNC) pulse starts the

scan in the upper left corner. The rst Horizontal Sync

(HSYNC) pulse initiates the sequential application of

RGB drive signals to the 640 pixels in row 1. Upon

receipt of the ENABLE signal, an RGB drive signal

is applied to the rst pixel. As long as the ENABLE

signal is present, RGB drive signals are then applied to

the remaining 639 pixels at the CLK rate of 25.18MHz,

or one every 39.72 nanoseconds. Typically it takes 31

microseconds to address all 640 pixels. Similarly, the

next HSYNC pulse applies drive signals to row 2. This

continues until all 480 rows have been addressed. Total

elapsed time to address all 480 rows is approximately 16

milliseconds. The next VSYNC pulse causes the above

cycle to repeat. Displays can be operated in FIXED

mode or DISPLAY ENABLE mode. In FIXED mode,

the rst pixel drive signal is applied a xed number

(48) of clock (CLK) cycles from the end of the HSYNC

pulse and the drive signals are terminated a xed number

(16) of CLK cycles prior to the next HSYNC pulse.

In DISPLAY ENABLE mode, the pixel drive signals

are applied to the pixels only while ENABLE signal is

present. This signal is typically present 4-48 CLKS after

the end of the HSYNC pulse and 2-16 CLKS prior

YORK INTERNATIONAL82

to the next HSYNC pulse. All YORK applications

operate in the DISPLAY ENABLE mode. The state of

the ENABLE (Display Interface Board J1-27) signal

from the Microboard places the Display in the desired

mode as follows:

• LG SEMICON Display does not have the xed

mode feature.

As described above, in OptiView Control Center

applications, the Display scan is left to right, beginning

with the top row and continuing sequentially through the

rows to the last row. However, in Display applications

other than OptiView Control Centers, image reversal is

sometimes required. In image reversal applications, the

scan is reversed; the scan is right to left, beginning with

the last row and proceeding to the top row.

Displays by different manufacturers can require

different timing and control signals. The Microboard

must know which Display is present in order to provide

the correct signals. Therefore, when AC control power

is rst applied to the OptiView Control Center, as part

of the power-up sequence, the Microboard reads the

Panel ID wire jumpers P1D0 - P1D3 on the Display

Interface Board and determines which Display is

present. It can then provide the correct timing and

control signals to produce the graphic image, as

required by the Display manufacturer. Since the

Display Interface Board identies the Display for

the Microboard, there is a different Display Interface

Board required for each Display application and each

has a unique jumper conguration that identies the

Display. A complete explanation of this process is

included in the preceding “Microboard” description

and the “Display Interface Board” description that

follows.

The DC power source to operate the Display is provided

by the Microboard J5. Some Display manufacturers

require +5VDC; others require +3.3VDC. The position

of Microboard Program Jumper JP2 determines which of

these power sources is supplied to the Display. JP2 must

be positioned according to the Display manufacturers

requirements. Refer to Table 2, “Program Jumpers”.

The Backlight Lamp provides the illumination for the

display. Average lamp life is 25000 hours (2.9 years).

Some displays use one lamp. Others use two lamps.

Lamps are replaceable, but not interchangeable between

different displays. Each Display manufacturer species

the required lamp for their display. Refer to replacement

parts list for appropriate replacement lamp. Service

replacement lamps are stocked in the YORK Service Parts

Distribution Center. The lamp is illuminated by applying a

high voltage AC (500 to 1500VAC) to it. This illumination

voltage is created from a low level DC voltage (+12VDC

or +5VDC as required by the Display manufacturer) by the

Backlight Inverter Board. Lamp brightness is controlled

by varying the high voltage AC. The greater the voltage

the brighter the illumination. The lamp is controlled by

on/off commands and brightness control signals applied

to the Backlight Inverter Board from the Microboard.

The Microboard Program determines when the lamp is

turned on and off and the lamp brightness. Each Display

manufacturer species the Backlight Inverter Board

to be used. Therefore, it will vary according to the

Display manufacturer. The ribbon cable that connects the

Microboard to the Backlight Inverter Board also varies

according to the Display manufacturer’s requirements.

Refer to Fig. 44. Microboard Program Jumpers JP3, 4,

5, 7 and 8 determine the voltage levels of the control

signals sent to the Backlight Inverter Board and must be

congured per the Display manufacturer’s requirements as

listed in Table 2. A detailed description of the operation of

this board is in the “Backlight Inverter Board” description

that follows. Also refer to the preceding “Microboard”

description for a detailed description of the Lamp

Dimmer circuit.

The actual Display that is installed in the OptiView

Control Center of the new chiller is determined by the

Display manufacturer contractual agreement in place

during the time of OptiView Control Center production.

Displays stocked for Service replacement are a result of

that same agreement. Therefore, the Display received for

service replacement may be by a different manufacturer

than the one in the OptiView Control Center. Since

each Display manufacturer requires a specic Display

Interface Board, Backlight Inverter Board and Inverter

Ribbon Cable, replacement Displays are ordered and

supplied as a Display Replacement Kit (YORK Part

Number 331-02053-000) to assure component compat-

ibility. The items supplied in the kit are compatible with

the supplied Display. The kit consists of the following

items mounted on a Display mounting plate:

Display Replacement Kit 331-02053-000:

1. Liquid Crystal Display with Lamp

2. Appropriate Display Interface Board for item 1

3. Appropriate Backlight Inverter Board for item 1

4. Appropriate ribbon cable (Backlight Inverter Board

to Microboard) for item 1

5. Ribbon cable (Display Interface Board to

Microboard)

6. All mounting hardware

7. Installation instructions. A label attached to the

Service

FORM 50.40-OM2

83YORK INTERNATIONAL

Display mounting plate lists the YORK part numbers

of the Display supporting components mounted

on the Display mounting plate and the required

Microboard Program Jumper (JP2 through 8)

congurations. Microboard Program Jumpers

JP2 - JP8 will have to be congured appropriately

for the replacement display. Refer to Table 2

“Program Jumpers”.

Display Handling:

1. The display is made of glass. It could break if

dropped.

2. The display front surface is easily scratched. If

soiled, wipe with a dry cotton cloth. Use no water

or chemicals.

3. The display is static sensitive. Electrostatic dis-

charges may damage the display.

4. A laminated lm is adhered to the display front

glass surface to prevent it from being scratched. Peel

off very slowly to prevent static damage.

Always remove control power from

the OptiView Remote Control Center

before connecting or disconnecting

wires to the display. Connecting or

disconnecting wires to the display

with power applied will damage the

display!!!

BACKLIGHT LAMP REPLACEMENT:

SHARP LQ10D367 Display: (Refer to Fig. 41)

Removal:

The Lamp slides into the Display from left to right and

is secured with a locking tab.

1. Remove Control Power from the OptiView Control

Center.

2. Remove protective cover from rear of Display.

3. Disconnect Lamp AC power connector from

Backlight Inverter Board.

4. Using ngernail or thin at blade screwdriver, bend

the locking tab outward slightly to clear the Lamp

housing protrusion.

5. Grasp Lamp AC power connector and gently pull

until Lamp housing clears locking tab.

6. Grasp Lamp housing and pull until Lamp housing is

completely removed from the Display.

Installation:

1. Slide new Lamp into Display from left to right

until Lamp housing protrusion locks into Display

locking tab.

2. Connect Lamp AC power connector to Backlight

Inverter Board.

3. Apply Control Power to OptiView Control Center.

LG Semicon LP104V2 Display (refer to Fig. 42)

Removal:

The Lamp slides into the Display from left to right and

is secured with a screw.

1. Remove Control Power from the OptiView Remote

Control Center.

2. Remove protective cover from rear of Display.

3. Disconnect Lamp AC power connector from Back-

light Inverter Board.

4. Using small Phillips screwdriver, remove lamp

retaining screw.

5. Grasp Lamp AC power connector and gently pull

until Lamp housing is completely removed from

the Display.

Installation:

1. Slide new Lamp into Display from left to right until

Lamp housing is fully inserted.

2. Secure Lamp with Lamp retaining screw.

3. Connect Lamp AC power connector to Backlight

Inverter Board.

4. Apply AC power to OptiView Remote Control

Center.

YORK INTERNATIONAL84

FIG. 37 – DISPLAY, MOUNTING

LD06751

FIG. 38 – LIQUID CRYSTAL DISPLAY TYPICAL CONTROL SIGNAL TIMING

LD04066

NOTES:

1. BP = Back Porch = 4-48 CLKS

2. FP = Front Porch = 2-16 CLKS

640 CLKS

640

COLUMNS

31US

VSYNC

480 ROWS

16MS

ROW 480

ROW 1 ROW 2

BP FP

DISPLAY

PERIOD

DISPLAY

PERIOD

DISPLAY

PERIOD

HSYNC

ENABLE

CLK

(25.18

MHz)

RGB

39.72 NS

Service

FORM 50.40-OM2

85YORK INTERNATIONAL

LIQUID CRYSTAL DISPLAY

SHARP LQ10D367

MOUNTING

PLATE

DISPLAY INTERFACE

BOARD 031-01765-002

DISPLAY CABLE

031-01769-000

INVERTER CABLE

031-01770-003

BACKLIGHT

INVERTER

BOARD

031-01789-000

LABEL

BACKLIGHT BULB

025-33752-000

FIG. 39 – LIQUID CRYSTAL DISPLAY ASSEMBLY - LG SEMICON LP104V2

LD06752

NOTE:

1. Congure Microboard Program Jumpers per label.

FIG. 40 – LIQUID CRYSTAL DISPLAY ASSEMBLY - SHARP LQ10D367

LD06753

NOTE:

1. Congure Microboard Program Jumpers

per label.

LIQUID CRYSTAL DISPLAY

LG SEMICON LP104V2

MOUNTING

PLATE

DISPLAY INTERFACE

BOARD 031-01765-001

DISPLAY CABLE

031-02055-000

INVERTER CABLE

031-02054-001

BACKLIGHT

INVERTER

BOARD

031-01789-000

LABEL

BACKLIGHT BULB

025-34564-000

331-02053-000

031-02054-001

035-17813-002

031-01789-000

025-34564-000

031-01765-001

YORK INTERNATIONAL86

FIG. 42 – DISPLAY (LG SEMICON LP104V2) LAMP REPLACEMENT

LD06754

LAMP HOLDER

BEZEL

PROTRUSION

HOLE

LOCKING TAB

WIRE

(white/GND side)

WIRE

(pink/HOT side)

DIRECTION A

DIRECTION B

DIRECTION C

FIG. 41 – DISPLAY (SHARP LQ10D367) LAMP REPLACEMENT

LD04067

LAMP HOLDER

BEZEL

RETAINING SCREW

WIRE

(white/GND side)

WIRE

(pink/HOT side)

DIRECTION B

DIRECTION C

Service

FORM 50.40-OM2

87YORK INTERNATIONAL

DISPLAY INTERFACE BOARD

(REFER TO FIG. 43)

The Display Interface Board is located on the Liquid

Crystal Display mounting plate and is part of the

Microboard interface to the Display. It permits the use

of Displays by different manufacturers, by providing the

Microboard with a means of automatically determining

which Display is present.

Since different Display manufacturers require different

timing and control signals, the Display Controller on the

Microboard must be congured to meet the requirements

of the actual Display installed. When AC power is

applied to the OptiView Remote Control Center, as part

of the power-up sequence, the Microboard reads the

four Panel ID wire jumpers, PID0 through PID3, on the

Display Interface Board to determine which Display is

present. The conguration of these jumpers indicates the

actual Display that is installed on the OptiView Remote

Control Center door. The Display Controller on the

Microboard is then congured appropriately.

On Sharp displays the conguration of wire jumpers

P30 and P31 determines whether the Display scan

orientation is Normal or Reverse (image reversal) scan.

As described in the preceding “Display” description,

Normal scan is left to right, beginning with the top row

and continuing sequentially through the rows to the

bottom row. Normal scan is used in OptiView Remote

Control Center applications. In Display applications

other than OptiView RCC applications, image reversal

is sometimes required. In image reversal applications,

the scan is reversed; the scan is right to left, beginning

with the bottom row and proceeding to the top row.

The jumper congurations determine the voltage level

at Display Interface Board J1-30 (P30) and J1-31

(P31). If P30 is IN, the voltage at J1-30 is +5.0VDC or

+3.3VDC (as determined by position of Microboard

Program Jumper JP2); if OUT, 0VDC. If P31 is IN,

the voltage at J1-31 is GND; if OUT, 0VDC. The

Display reads these voltages and adopts a scan mode

as follows:

SHARP LQ10D367 & LQ10D421 Displays:

SHARP displays require conguration of both jumpers

to achieve total image reversal.

P30 IN - Normal scan; left to right

OUT - Reverse scan: right to left

P31 IN - Normal scan; top to bottom

OUT - Reverse scan; bottom to top

The wire jumpers on this board are not eld congu-

rable, as with typical Program Jumpers. There are two

variations of the Display Interface Board. Each board

has the wire jumpers congured appropriately for the

display to which it is attached, as shown below. Display

Interface Boards are available individually for service

replacement. The YORK part number of the Display

Interface Board compatible with the installed Display is

listed on a label attached to the Display mounting plate.

However, service replacement Displays are provided

as a kit (331-02053-000) that includes, among other

items, the appropriate Display Interface Board for

the Display included in the kit. Refer to explanation in

“Liquid Crystal Display” description.

031-01765-001:

Display applicability - LG Semicon LP104V2

Jumper conguration - PID0 - IN

PID1 - OUT

PID2 - OUT

PID3 - OUT

P30 - OUT

P31 - OUT

031-01765-002:

Display applicability - SHARP LQ10D367

Jumper conguration - PID0 - OUT

PID1 - IN

PID2 - OUT

PID3 - OUT

P30 - IN

P31 - IN

The red, green and blue display drive and control signals

are simply passed through the Display Interface Board.

The value of VCC is either +5VDC or +3.3VDC,

as determined by the position of Program Jumper

JP2 on the Microboard. PID0 through PID3, when

installed, connect their respective Microboard (J5)

inputs to GND; when removed, the Microboard pulls

these signals up to +5VDC. When P30 is installed, the

Display input (CN1-30) is connected to VCC (+5VDC

or +3.3VDC as determined by Microboard Program

Jumper JP2). When P31 is installed, the Display input

(CN1-31) is connected to GND.

YORK INTERNATIONAL88

FIG. 43 – DISPLAY INTERFACE BOARD

LD04070

LG SEMICON LP104V2

031-01765-001 - PID0 IN

PID1-3 OUT

P30, P31 OUT

SHARP LQ10D367

031-01765-002 - PID0 OUT

PID1 IN

PID2, 3 OUT

P30, 31 IN

Service

FORM 50.40-OM2

89YORK INTERNATIONAL

DISPLAY BACKLIGHT INVERTER BOARD

(REFER TO FIG. 44)

The Display Backlight Inverter Board generates a

high voltage AC signal that is applied to the backlight

lamp, causing it to illuminate. The magnitude of the

signal determines the lamp brightness. Displays by some

manufacturers have two lamps; one at the top and one at

the bottom of the display. Other Display manufacturers

have only a lamp at the top of the display.

An Inverter converts low level DC voltage (+12VDC

or +5VDC, as required by the manufacturer) from the

Microboard to a 500 to 1500VAC 60KHz signal that

is applied to the lamp. The higher the AC voltage, the

greater the brightness of the lamp. When this voltage

is not present, the lamp is turned off.

High voltage, up to 1500VAC, is pres-

ent at the output of the backlight

inverter board. Refer to Figure 44

and locate the output connectors. Use

extreme caution when working in this

area!!!

Different Display manufacturers require different Backlight

Inverter Boards. The different board designs require different

control voltage inputs. To accommodate these variations,

Microboard Program Jumpers JP3 - JP5, JP7 and JP8 must

be congured to provide the required voltage levels. A label

attached to the Display mounting plate lists the required

Program Jumper conguration for that particular display.

Refer to Table 2 for required Program Jumper congurations

for the various Display applications.

Under Program control, the Microboard generates the

control signals that are applied to the Backlight Inverter

Board. The Program determines when the lamp is turned

on and off. It also adjusts the lamp brightness. To increase

the average lamp life of 25000 hours, the lamp brightness

is normally adjusted to 50%. This brightness level will

still allow the display to be visible. When the Program

senses a Keypad key has been pressed, it adjusts the

brightness to 100% (maximum).

The lamp illumination high voltage AC is generated

from either +12VDC or +5VDC as required by the

manufacturer. Microboard Program Jumper JP5 must

be positioned to provide the required voltage. The

Microboard provides the Backlight Enable signal. This

signal turns the lamp on and off. Some manufacturers

require this signal to be +12VDC, others require +5VDC.

Program Jumper JP4 must be positioned to provide the

required voltage. Further, some applications require this

signal to be a +VDC (+12VDC or +5VDC) to turn on

the lamp. Others require this signal to be 0VDC to turn

on the lamp. Program Jumper JP3 must be positioned to

provide the required polarity.

Depending upon the Display manufacturer, the brightness

control input from the Microboard must be either a variable

voltage or a variable resistance. Microboard Program

Jumpers JP7 and JP8 are used to provide the appropriate

technique (refer to Fig. 34). The lamp dimmer circuit on

the Microboard is an IC that is the electrical equivalent

of a 10K ohm potentiometer with 100 positions or steps.

The Program adjusts the position of the potentiometer.

When congured for variable voltage (JP7 & JP8 installed),

the output between Microboard J6-7 and J6-8 is a 0 to

+5.0VDC signal. Not all applications require the full

5.0VDC range. If congured for variable resistance (JP7

and JP8 removed), the output between Microboard J6-7 and

J6-8 is a 0 to 10K ohm variable resistance.

The OptiView Remote Control Center could be supplied

with any of several approved Displays. Each Display

requires a specic Backlight Inverter Board. This board

is available as a service replacement part (the required

Backlight Inverter Board part number is listed on the

label attached to the Display mounting plate). However,

service replacement Displays are provided in a kit

(YORK P/N 331-02053-000) that includes the appropriate

Backlight Inverter Board (refer to “Liquid Crystal Display”

description).

SHARP model LQ10D367 and LG Semicon LP104V2

display requires a TDK CXA-LO612-VJL Backlight

Inverter Board (YORK P/N 031-01789-000) (ref. Fig. 39

and Fig. 40). These boards generate a lamp illumination

high voltage AC from +12VDC. When the Backlight

Enable signal at connector CN1-3 is +5VDC, the high

voltage signal is applied to the lamp. When CN1-3 is

0VDC, the high voltage signal is removed from the lamp,

turning it off. The lamp brightness is controlled by a

variable voltage signal, developed by the lamp dimmer

circuit (ref. Fig. 34) on the Microboard and applied

to connector CN1-4. The lamp dimmer circuit varies

the voltage at CN1-4 over the range of 0 to +3.0VDC.

0VDC produces maximum (100%) brightness; +3.0VDC

produces minimum (0%) brightness. Voltages between

these values produce a linear brightness 0 and 100%.

Connector CN2 applies the high voltage lamp illumination

signal to the lamp.

YORK INTERNATIONAL90

N.C.

MICRO

BOARD

INVERTER

BOARD

1 2 3 4 5

N.C.

CN1

CN2

3 2 1

N.C.

RETURN

500 - 1400 VAC

BACKLIGHT

LAMP

BRIGHTNESS CONTROL (NOTE 2)

BACKLIGHT ENABLE (NOTE 1)

GND

+ 12 VDC (NOTE 3)

INVERTER CABLE 031-02054-001

DISPLAY BACKLIGHT INVERTER BOARD

TYPE: TDK CXA-L0612-VJL

PART NUMBER: 031-01789-000

FOR: SHARP LQ10D367 &

LG SEMICON LP104V2-W DISPLAYS

FIG. 44 – DISPLAY BACKLIGHT INVERTER BOARD

LD06755

NOTES:

1. OFF = 0VDC; ON = +5VDC. Refer to

Microboard Program Jumpers JP3 & JP4 in

Table 2.

2. 0 - +3.0VDC. 0VDC = MAX (100%) Brightness;

+3.0VDC = MIN (0%) Brightness. Refer to Fig.

34 and Microboard Jumpers JP7 & JP8.

3. Refer to Microboard Program Jumper JP5.

4. N.C. = No Connection.

Service

FORM 50.40-OM2

91YORK INTERNATIONAL

KEYPAD

(REFER TO FIGURES 45 & 46)

The Keypad contains touch-sensitive keys that allow

the Operator to interface with the Control Center. The

Operator presses the keys to request the desired screens

of information and enter System Setpoints.

The top layer of the Keypad contains embossed areas

identifying the keys. Under each embossed key area are

two conductors, one on top of the other, separated by

an air space. The conductors are arranged in a matrix

of rows and columns and connected to the Keypad

connector as shown in Fig. 46. The embossed area

of each key is located directly over the intersection

point of the conductors. Pressing the embossed key

area causes contact and electrical continuity between

the two conductors. For example, pressing the “1” key

creates continuity between the Keypad connector pin

5 (column 3) and pin 13 (row 4). Since this connector

is interfaced to the Microboard (J18), the Microboard

senses this continuity as described below and concludes

the “1” key is pressed.

The Microboard Program continuously scans the Keypad

to determine if a key is pressed. Beginning with row 1

and proceeding through all rows, the Program places a

“logic low” (<1VDC) on a row, a “logic high” (>4VDC)

on the remaining rows and reads the columns. A logic

low in any column indicates a key in that column and

row is pressed. For example, if at the time row 4 is

being driven low, if column 3 is low, then the Micro

concludes the key at coordinate of row 4 and column 3

is pressed. Since the coordinates of all keys are stored

in the Microboard’s Program, it can identify which key

is at this coordinate and responds accordingly. In this

example the “1” key is pressed.

In order for the Microboard to reliably detect closed

and open keys, each key must meet a closed circuit

and open circuit resistance requirement. When a key

is pressed, the contact resistance must be < 100 Ohms.

When a key is not pressed, the contact resistance must

be > 1 Meg Ohm. If the Microboard is not responding to

a pressed key, or if it’s detecting a closed key when none

are pressed, it could be because the contact resistance

requirements are not being met. The operation of each

key can be checked with an Ohmmeter. To check the

open and closed contact resistance of any key, refer

to the “Diagnostics and Troubleshooting” description

in this book.

The Keypad is attached to the front of the Remote

Control Center door with an adhesive backing. If

service replacement is required, start at one corner

and slowly peel the Keypad from the door. The rear

side of the replacement Keypad is coated with an

adhesive covered with a paper backing. Remove the

paper backing, align the Display opening and apply

the Keypad to the door.

YORK INTERNATIONAL92

LD06756

FIG. 45 – KEYPAD

Service

FORM 50.40-OM2

93YORK INTERNATIONAL

FIG. 46 – KEYPAD

LD04075

LD04076

YORK INTERNATIONAL94

POWER SUPPLY

(REFER TO FIG 47)

The Power Supply provides the DC power for the LCD

Display and all the printed circuit boards in the Control

Center. It receives a 100 to 250VAC input from an

external power source and provides the following DC

outputs:

• +12VDC

• +5VDC

• Ground

The +12VDC, Gnd and +5VDC outputs are applied to

the Microboard. There, these voltages are applied to

the circuits requiring the respective voltage. From the

Microboard, the +12VDC and +5VDC are distributed

to other system components requiring these voltages.

These include the MicroGateway, LCD Display and

Display Backlight Inverter Board.

As shown in Fig. 47, the Microboard contains two

voltage regulators that create separate +5VDC and

+3.3VDC supplies. The +5VDC supply is dedicated

to all the Microboard Analog circuits and is labeled

as the +5VDC (Analog) supply. It is also routed to

all Temperature Thermistors. This permits all Analog

circuits to be powered by the same supply, eliminating

any offsets caused by voltage regulator drift. The

+3.3VDC supply is utilized by the Microprocessor,

Flash Memory Card and other digital circuits. It

could also be applied to the Backlight Inverter Board,

depending on the Display manufacturer’s requirements

as explained next.

Different Display manufacturers can require different

supply voltages for their display and supporting circuits.

To accommodate the different Display manufacturer’s

voltage requirements, Microboard Program Jumpers JP2

and JP5 must be positioned to provide the required supply

voltages to the Display and the Display Backlight Inverter

Board. Either +5VDC or +3.3VDC, as determined

by JP2, is applied to the Display. Either +12VDC or

+5VDC, as determined by JP5, is applied to the Display

Backlight Inverter Board. Refer to Table 2 “Microboard

Program Jumpers”.

Service

FORM 50.40-OM2

95YORK INTERNATIONAL

FIG. 47 – POWER SUPPLY – DC POWER DISTRIBUTION (REFER TO CONTROL CENTER WIRING DIAGRAM FOR WIRE CONNECTIONS)

LD06757

NOTES:

1. +5 or +3.3VDC as determined by Microboard Program Jumper JP2

& display requirements.

2. +12 or +5VDC as determined by Microboard Program Jumper JP5

& display requirements.

POWER

SUPPLY

MICRO

BOARD

MICROGATEWAY

LCD

DISPLAY

DISPLAY BACKLIGHT

INVERTER BOARD

+5VDC (ANALOG) ALL TRANSDUCERS & THERMISTORS

+12VDC

GND

VDD (NOTE 1)

GND

+V (NOTE 2)

GND

+12VDC

GND

+5VDC

YORK INTERNATIONAL96

The problems that could be encountered in the Control

Center are in the following categories:

• Keypad

• Display

• Serial Input/Output (I/O)

• Digital Input/Output (I/O)

• Analog Inputs

There is a Diagnostic and associated Troubleshooting

procedure for each category. They are described

on the following pages. The ofine diagnostics are

accessed from the Diagnostics Main Screen, which is

entered using the procedure below. If there is a Remote

Control Center problem, determine the category of

the problem. Then perform the applicable Diagnostic.

If the Diagnostic reveals a malfunction, perform the

Troubleshooting procedure to locate the defective

component.

There are several documents that must be referred to

while performing the Diagnostics and Troubleshooting

procedures. Each procedure references the Section and

gures of this book that describe the operation of the

component being tested.

The Offline diagnostic screens are only available

when the panel is powered on (or rebooted) with the

Diagnostics Enable dip switch in the Enabled position.

When in this mode all normal RCC functions are

disabled. If the Diagnostics Enable dip switch is placed

in the Disabled position while the panel is in the Ofine

Diagnostics mode, the Diagnostics task will cause the

panel to reboot into the online diagnostics mode.

OFFLINE DIAGNOSTICS & TROUBLESHOOTING

(REFER TO FIG 48 & 49)

Service

FORM 50.40-OM2

97YORK INTERNATIONAL

Each of the Ofine Diagnostics is accessed from this

screen. Press the appropriate key to select the desired

diagnostic. After each diagnostic is performed, return

to this MAIN Screen, from which the next diagnostic

can be selected.

Some of the diagnostics have sub-screens that are

accessed from the selected diagnostic screen. The

sub-screens are shown indented:

Main screen

- Keypad test

- Display test

- Bit patterns test

- All red

- All green

- All blue

- All white

- All black

- Serial 1/0

- Digital 1/0

- Analog Inputs

MAIN DIAGNOSTICS SCREEN

FIG. 48 00527VIPC

YORK INTERNATIONAL98

KEYPAD TEST

This diagnostic is used to verify Keypad operation and

the Microboard’s ability to respond to a pressed key.

Refer to description of Keypad operation in Section

5 of this book.

Procedure

1. Press each keypad key. As the key is pressed, an

illuminated LED is displayed corresponding to

the key location on the keypad.

2. Press the DIAGNOSTICS key to return to the

MAIN DIAGNOSTICS Screen.

Troubleshooting

If an LED is not displayed when a key is pressed, the

Keypad, Keypad ribbon cable or Microboard could be

defective. Use the following procedure to locate the

defective component.

1. Keypad

a. Disconnect the ribbon cable from the Keypad.

b. Identify row/column coordinate of the key to

be tested. Refer to Figure 46.

c. In the Keypad connector, locate the pins of

the row/column coordinate of the key of the

key to be tested.

d. Insert the leads of an Ohmmeter into the pins

identied in step “c” above.

e. Press the key to be tested. If the contact

resistance is >100 Ohms, the Keypad is defec-

tive.

f. Release the key. If the contact resistance is < 1

Meg Ohm, the Keypad is defective.

2. Ribbon Cable

Using an Ohmmeter, perform a continuity test on

all conductors in the ribbon cable. An open circuit

would indicate the ribbon Cable is defective.

3. Microboard

There are no checks or measurements to be

made on the Microboard. If the Keypad and

Ribbon Cable check OK per the above procedures,

the Microboard is most likely the cause of the

problem.

FIG. 49 00568VIPC

Service

FORM 50.40-OM2

99YORK INTERNATIONAL

Each of the Display Diagnostics is accessed from this

screen. After each diagnostic is performed, return to

this screen, from which the next diagnostic can be

selected. Refer to description of Display operation in

Section 5 of this book.

PROCEDURE

1. Press the appropriate keypad key to perform the

desired test from the list below.

2. Press the CANCEL (X) or ENTER (T) key to

terminate test and return to DISPLAY TEST MAIN

Screen, from which another test can be selected.

3. When all the desired tests have been performed,

press the DIAGNOSTICS key to return to the

MAIN DIAGNOSTICS Screen.

• Bit Patterns - This test is used to detect

jitter and alignment defects. It veries proper

operation and compatibility of the Microboard

Display Controller with the display. Four

vertical bars of green, dark blue, light blue and

yellow, outlined by a red border are displayed.

If the vertical bars are not stable or straight, or

the red border is not completely visible, then

either the Microboard Program Jumpers are not

congured correctly for the installed display or

the Microboard Display controller is defective.

Refer to Figure 51.

• All Red - This test veries the operation of all

of the red pixels. All of the red pixels are turned

on to create a completely red screen. Any red

pixels that do not turn on will appear as black

dots on the display. If any black dots appear, rst

ascertain it is not caused by dirt that is lodged

between the display surface and the protective

plastic cover. It is normal for a small number of

randomly spaced pixels to not illuminate. It is not

necessary to replace the display if a small number

of black dots appear. They will not be visible

on the normal screens displayed outside of this

diagnostic mode. However, large black areas

would be indicative of a defective display.

• All Green - This test verifies the operation

of all of the green pixels. All of the green

pixels are turned on to create a completely

green screen. Refer to description of “All Red”

test above.

• All Blue - This test veries the operation of

all of the blue pixels. All of the blue pixels are

turned on to create a completely blue screen.

Refer to description of “All Red” test above.

• All White - This test veries the display’s ability

to turn on all pixels to display a completely

white screen. Any pixel that does not turn on

will appear as a black dot. Refer to description

of “All Red” test above.

• All Black - This test veries the display’s ability

to turn off all pixels to display a completely

black screen. Any pixel that does not turn off

will appear as a red, green, blue or white dot.

Refer to description “All Red” test above.

DISPLAY TEST

FIG. 50 00528VIPC

YORK INTERNATIONAL100

BIT PATTERNS TEST SCREEN

TROUBLESHOOTING

If any of the above tests do not perform correctly as

described above, perform the applicable procedure

below:

Test Failed:

Bit Patterns - If the vertical bars are not straight

or if the red border is not completely visible, either

the Microboard Program Jumpers are not congured

correctly or for the installed Display or the Microboard

is defective.

All Red, All Green, All Blue, All White or All Black:

If these tests do not produce appropriate solid color

screens, the Display Ribbon Cable, Display Interface

Board, Microboard or Display could be defective. To

locate the defective component perform tests in the

following order:

1. Display Ribbon Cable:

Using an Ohmmeter, perform a continuity

test on all conductors in the ribbon cable. An

open circuit would indicate the ribbon cable

is defective.

2. Display Interface Board:

Using an Ohmmeter, perform a continuity test

on all conductors of the Interface Board. An

open circuit would indicate the Interface Board

is defective.

3. Microboard:

a. With the “All Red” test selected, the voltage

at Microboard J5-6 through J5-11 (Red drivers

bits 0-5), as measured to Gnd, should be >

3.0VDC. If not, the Microboard is defective.

b. With the “All Green” test selected, the voltage

at Microboard J5-13 through J5-18 (Green

drivers bits 0-5), as measured to Gnd, should be

>3.0VDC. If not, the Microboard is defective.

c. With the “All Blue” test selected, the voltage at

Microboard J5-20 through J5-25 (Blue drivers

bits 0-5), as measured to Grid, should be

>3.0VDC. If not, the Microboard is defective.

d. With the “All White” test selected, the voltage at

Microboard J5-6 through J5-11, J5-13 through

J5-18 and J5-20 through J5-25 should be

>3.0VDC. If not, the Microboard is defective.

e. With “All Black” selected, the voltage at

Microboard J5-6 through J5-11, J5-13 through

J5-18 and J5-20 through J5-25 should be

<1.0VDC. If not, the Microboard is defective.

4. Display:

If the Display Ribbon Cable, Display Interface

Board and Microboard check OK per the above

procedures, the Display is most likely the cause

of the problem.

FIG. 51 00529VIPC

Service

FORM 50.40-OM2

101YORK INTERNATIONAL

SERIAL INPUTS / OUTPUTS TESTS

This diagnostic is used to verify correct operation of

the Serial Data Ports. There is a test for each of the

five Serial Data Ports. Each RS-232 port (COM 1,

2 and 4b) is tested by transmitting serial test data

from outputs to inputs of each port. Both the transmit

and receive functions as well as the control lines are

tested. The RS-485 ports (COM 3 and 4a) are tested

by transmitting serial test data from one RS-485 port

to another. The TX/RX opto-coupled port (COM 5)

is tested by transmitting serial test data from the TX

output to the RX input. If the received data matches the

transmitted data, PASS is displayed, indicating the serial

port is OK. Otherwise, FAIL is displayed, indicating

the serial port is defective. Prior to performing each

test, the Service Technician must install a wire loop-

back connection as described below. Refer to Section

5 and Figure 35 of this book for description of the

Serial data Ports.

PROCEDURE

1. Using small gauge wire, fabricate loop-back

connections and install as follows for each

port to be tested. Failure to install the loop-

back connection or congure the Microboard

Program jumper as noted will result in a FAIL

outcome for the test.

From To

COM 1 J2-4 (TX) J2-3 (RX)

J2-5 (DTR) J2-2 (DSR)

From To

COM 2 J13-5 (TX) J13-3 (RX)

J13-7 (DTR) J13-1(DCD) &

J13-2(DSR)

J13-4 (RTS) J13-6 (CTS) &

J13-8 (RI)

RS-485 From To

(COM J12-3 (+) J11-3 (+)

3 & 4a) J12-2 (-) J11-2 (-)

Microboard Program Jumper JP27 must be installed

in position 1 & 2.

From To

COM 4b J2-7 (GTX) J2-6 (GRX)

Microboard Program Jumper JP27 must be installed

in position 2 & 3

2. After connecting appropriate loop-back con-

nections above, press the appropriate key to

initiate the desired test. An LED will illuminate

indicating the test is in progress. If it is desired

to terminate the test, press the CANCEL TEST

key. Test data is sent from an output to an input

as described below. At the completion of

each test, if the data received matches the

data sent, the Serial Port operates properly

and PASS is displayed. Otherwise, FAIL is

FIG. 52 00530VIPC

YORK INTERNATIONAL102

displayed, indicating the Serial Port is defective.

A FAIL result would be indicative of a defective

Microboard. The following is a description

of each test.

COM 1 – Two tests are performed. Test data is

sent from TX (J2-4) to RX (J2-3) at 9600 Baud

and DTR (J2-5) is set to a Logic High level and

read at DSR (J2-2). If any test fails, COM 1

tests are terminated.

COM 2 – Three tests are performed. Test data

is sent from TX (J13-5) to RX (J13-3) at 19200

Baud. DTR (J13-7) is set to a Logic High and

read at DSR (J13-2) & DCD (J13-1). RTS

(J13-4) is set to a Logic High and read at CTS

(J13-6) & R1 (J13-8). If any test fails, COM 2

tests are terminated.

RS-485 (COM 3 & 4a) – Test data is sent from

COM 3 RS-485 port to COM 4a RS-485 Port at

19200 Baud. Test data is then sent from COM

4a to COM 3 at the same rate. If either test fails,

RS-485 tests are terminated.

COM 4b – Test data is sent from GTX (J2-7)

to GRX (J2-6) at 19200 Baud.

3. After all desired tests have been performed,

press the DIAGNOSTICS key to return to the

MAIN DIAGNOSTICS Screen.

Service

FORM 50.40-OM2

103YORK INTERNATIONAL

DIGITAL INPUTS / OUTPUTS TESTS

This diagnostic is used to analyze the digital inputs and

outputs of the Microboard.

The state of each Microboard Program Jumper and

Program DIP Switch, as interpreted by the Microboard,

is depicted by an LED. If the Microboard interprets its

input as being at a Logic Low (<1.0VDC) level, the

LED is illuminated. If interpreted as being at a Logic

High (>4.0VDC) level, the LED is extinguished.

PROCEDURE

Digital Inputs:

1. The Digital Inputs are listed on this screen

according to Microboard Program Jumpers

and Program DIP Switches. Tables 2 and 3

list the functions of the Program Jumpers and

Switches.

2. If a Program Jumper is present, the applicable

LED should be extinguished. If the LED is not

extinguished, the Microboard is defective.

3. If a Program Jumper is not present, the appli-

cable LED should be illuminated. If the LED is

not illuminated, the Microboard is defective.

4. If a Program Switch (DIP) is in the ON position,

the applicable LED should be illuminated. If

the LED is not illuminated, the Microboard

is defective.

5. If the Program Switch (DIP) is in the OFF posi-

tion, the applicable LED should be extinguished.

If the LED is not extinguished, the Microboard

is defective.

6. When all desired tests have been performed,

press DIAGNOSTICS key to return to MAIN

DIAGNOSTICS Screen.

FIG. 53 00531VIPC

YORK INTERNATIONAL104

ANALOG INPUTS TESTS

This diagnostic is used to analyze the Analog Inputs to

the Microboard. The voltage level of each Analog input,

as interpreted by the Microboard, is displayed. The

“Counts” listed for each parameter is the Analog-to-

Digital (A/D) converter value and is for manufacturing

and engineering use only.

The following is a list of the Analog inputs displayed.

Channel

0 - Presently Not Used.

1 - Presently Not Used.

FIG. 54 00532VIPC

Service

FORM 50.40-OM2

105YORK INTERNATIONAL

SYSTEM COMMISSIONING CHECKLIST

Use the following checklist during commissioning to

assure all Setpoints have been programmed to the desired

value and all calibrations have been performed. The

Setpoints are grouped under the Display Screen in which

they appear. The indented screens are subscreens of the

numbered screens and are accessed from the numbered

screens. An explanation of each setpoint or Calibration

Procedure below is contained in the reference document

listed in parenthesis adjacent to each item. If any of

the Setpoints have to be changed, use the standard

programming procedures in the Operation Section.

Thresholds, values and calibrations of items marked with

an asterisk “*” have been determined and entered/set at

the YORK Factory at the time of manufacture.

1. PROGRAM JUMPERS/SWITCHES:

____ Verify Microboard Program Jumpers and

Program Switches are congured appropriately.

2. SETPOINTS Screen:

The setpoints listed on the SETPOINTS Screen have

already been programmed at the chiller/condensing unit.

The values shown reect the previously programmed

values. However, the setpoints listed here can be changed

on this screen if desired only if the chiller/condensing

unit is in remote conrol mode. This screen is used

primarily as a central location from which most setpoints

can be programmed. If it is not desired to change any

of the listed setpoints, proceed to the following RCC

SETPOINTS Screen.

3. RCC SETPOINTS Screen:

____ Number of Units Connected

RCC SETUP Screen:

____ Enable Clock

____ Enter CLOCK Time and Date

____ Select 12 or 24 hour display mode

COMMS Screen:

Enter the following parameters as required for com-

munication to the remote chiller panel(s):

____ RCC Poll Time

PRINTER Screen:

If Printer is connected to Microboard serial ports,

enter the following:

____ Baud rate

____ Number of data bits

____ Number of stop bits

____ Parity

____ Automatic printer logging Enable/disable

____ Log start time

____ Log output interval

____ Log Unit Selected (1-8, All)

____ Printer type

YORK INTERNATIONAL106

SECTION 6 – PART NUMBER AND RENEWAL PARTS

ITEM DESCRIPTION FIG. NO. QTY. PART NO.

1 MICROPROCESSOR BOARD (NOTE 2) 56 1 031-01730-002

2 POWER SUPPLY ASSY 56 1 371-02750-411

3 KEYPAD 55 1 024-30974-001

4 TERMINAL BLOCK 56 1 025-35120-000

5 DISPLAY KIT (NOTE 1) 55 1 331-02053-000

6 CABLE ASSY. POWER SUPPLY 56 1 571-02750-421

7 KEYPAD TO MICRO RIBBON CABLE 56 1 031-02056-000

8 EPROM, BIOS (U45) 56 1 031-01796-001

9 FLASH MEMORY CARD, PROGRAMMED (U46) 56 1 031-02057-001

10 IC, BRAM (U52) 56 1 031-02028-000

11 FLAT CABLE FERRITE CLAMP 56 1 025-34172-000

12 SLEEVE SNAP FERRITE 56 1 025-35154-000

13 BACKLIGHT BULB 57 1 See Note 4

14 BACKLIGHT INVERTER BOARD 57 1 See Note 4

15 BACKLIGHT INVERTER BOARD RIBBON CABLE 57 1 See Note 4

16 DISPLAY INTERFACE BOARD 57 1 See Note 4

17 DISPLAY INTERFACE BOARD RIBBON CABLE 57 1 031-02055-000

18 LAN TRANSIENT PROTECTION MODULE 2 1 031-01586-000

19 TRANSIENT VOLTAGE SUPPRESSOR 2 2 031-02076-000

20 IC, RS-485 DRIVER 56 4 031-02074-000

21 FUSE, F1 & F2, 5 AMP (Rev. E and later Microboards) 58 2 025-34592-000

22 MICROGATEWAY OPTIVIEW KIT (future option) 56 1 371-03609-001

23 EPROM, MICROGATEWAY 56 1 See 450.RP1

TABLE 5 - RENEWAL PARTS

NOTES:

1. The replacement Liquid Crystal Display supplied by YORK might not be by the same manufacturer as the original Display. Each Display

requires a specific Display Interface Board (Item 16), Backlight Inverter Board (Item 14), and Backlight Inverter Board ribbon cable (Item

15). Therefore, the Liquid Crystal Display is not available separately. Service replacement Displays or supporting components must

not be arbitrarily selected! Non-compatibility of components will result in incorrect operation! To assure compatible supporting

components, the Display is supplied as a kit (part number 331-02053-000), which contains a replacement Display and all compatible

supporting components on a mounting plate. For future reference, a label attached to the side of the mounting plate (Fig. 57) lists

the YORK part numbers of these compatible components and the required configuration of the Microboard Program Jumpers. These

Program Jumpers must be configured for this Display by a qualified Service Technician following instructions in this manual. The

contents of the kit are as follows:

a. Liquid Crystal Display

b. Backlight Bulb (Item 13)

c. Appropriate Display Interface Board (Item 16) for Display

d. Appropriate Display Interface Board ribbon cable (Item 17) for Item16.

e. Appropriate Backlight Inverter Board (Item 14) for Display.

f. Appropriate Backlight Inverter Board ribbon cable (Item 15) for Item 14.

g. All mounting hardware.

h. Installation instructions.

2. Replacement Microboards are shipped without Flash Memory Cards (U46) or BRAM (U52). Remove these devices from defective Board

and use them in replacement Board. If a new Eprom, Flash Memory Card or BRAM is required, refer to the previous table for part number.

Return all unused Flash Memory Cards with Warranty return boards.

3. Ferrites are shipped in cloth bag. They are applied to the chiller communication RS-485 cable and the MicroGateway LAN cable prior

to exiting the Remote Control Center enclosure.

4. Refer to label (Fig. 57) on Display mounting plate for YORK part number of applicable replacement part. Service replacement Display

supporting components must not be arbitrarily selected! Non-compatibility of components will result in incorrect operation!

Renewal Parts

TABLE 4 - PART NUMBER

DESCRIPTION PART NO.

COMPLETE OPTIVIEW RCC PANEL 371-02750-101

FORM 50.40-OM2

107YORK INTERNATIONAL

00533VIP

FIG. 55 – FRONT OF OPTIVIEW REMOTE CONTROL CENTER

FIG. 56 – INSIDE OF OPTIVIEW REMOTE CONTROL CENTER

00534VIP

20 23

YORK INTERNATIONAL108

16 17

FIG. 57 – INSIDE DOOR OF OPTIVIEW REMOTE CONTROL CENTER

00535VIP

Renewal Parts

FORM 50.40-OM2

109YORK INTERNATIONAL

FIG. 58 – LOCATION OF FUSE, F1 & F2

LD06513

YORK INTERNATIONAL110

The following factors can be used to convert from English to the most common SI Metric values.

TEMPERATURE

To convert degrees Fahrenheit (°F) to degrees Celsius (°C), subtract 32° and multiply by 5/9 or 0.5556.

To convert a temperature range (i.e. 10°F or 12°F chilled water range) from Fahrenheit to Celsius, multiply

by 5/9 or 0.5556.

MEASUREMENT MULTIPLY THIS BY TO OBTAIN THIS

ENGLISH VALUE METRIC VALUE

CAPACITY TONS REFRIGERANT EFFECT (ton) 3,516 KILOWATTS (kW)

POWER KILOWATTS (kW) NO CHANGE KILOWATTS (kW)

HORSEPOWER (hp) 0.7457 KILOWATTS (kW)

FLOW RATE GALLONS/MINUTE (gpm) 0.0631 LITERS/SECOND (l/s)

LENGTH FEET (ft) 304.8 MILLIMETERS (mm)

INCHES (in.) 25.4 MILLIMETERS (mm)

WEIGHT POUNDS (lb.) 0.4536 KILOGRAMS (kg)

VELOCITY FEET/SECOND (fps) 0.3048 METERS/SECOND (m/s)

PRESSURE DROP FEET OF WATER (ft) 2.989 KILOPASCALS (kPa)

POUNDS/SQ. INCH (psi) 6.895 KILOPASCALS (kPa)

SI METRIC CONVERSION

Renewal Parts

P.O. Box 1592, York, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in USA

Form 50.40-OM2 (601)

New Release

York Optiview Remote Control Center 00497Vip Users Manual Form

00497VIP to the manual c0861755-76f6-4fd2-aa30-b88faa77b723

Navigation menu

Versions of this User Manual:

Views

Navigation