ICP C2A318GKA100 User Manual AIR CONDITIONER Manuals And Guides L0909278

ICP Air conditioner/heat pump(outside unit) Manual L0909278 ICP Air conditioner/heat pump(outside unit) Owner's Manual, ICP Air conditioner/heat pump(outside unit) installation guides

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Theseinstructionsmust bereadand understoodcompletelybeforeattemptinginstallation.

Safety Labeling and Signal Words
DANGER,
NOTE

WARNING,

CAUTION,

and
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:

The
signal
words
DANGER,
WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manuals that may
apply to the product.

The signal word CAUTION is used throughout this
manual in the following manner:

DANGER - Immediate hazards which will result in
severe personal injury or death.
Signal Words on Product Labeling

WARNING - Hazards or unsafe practices which
could result in severe personal injury or death.

Signal words are used in combination with colors
and/or pictures on product labels.

CAUTION - Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE - Used to highlight suggestions which will
result in enhanced installation, reliability, or operation.

TABLE OF CONTENTS
Inspect New Unit ...............................

Safety Considerations

...........................

Location .......................................
Clearances

.................................

Unit Support

2- 3

...................................

Refrigeration System

........................

Electrical Wiring ............................
Start-up Procedure ............................
Refrigerant Charge

4- 8
9 - 10

........................

11
11 - 12

Sequence of Operation .........................

Troubleshooting

Maintenance
Comfort Alert

...............................

..................................
TM

Diagnostics Codes

13
..............

DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified persons could result in equipment malfunction, property damage, personal injury and/or death.
The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with
the proper tools and test instruments.
Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition or Canadian Electrical
Code Part 1 CSA C.22.1.

421 01 5002 01 May 2009

INSPECT NEW UNIT
After uncrating unit, inspect thoroughly for hidden
damage. If damage is found, notify the transportation

company
claim.

immediately

and file a concealed

damage

SAFETY CONSIDERATIONS
Consult a qualified installer, service agency, or the
dealer/distributor for information and assistance. The
qualified installer must use factory authorized kits and
accessories when modifying this product. Refer to the
individual instructions packaged with the kit or accessory
when installing.
The weight of the product requires careful and proper
handling procedures when lifting or moving to avoid
personal injury. Use care to avoid contact with sharp or
pointed edges.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use a heat sinking material such as a wet rag - during brazing operations. Keep a fire
extinguisher available. Consult local codes and the
National Electric Code (NEC) for special requirements.

ELECTRICAL

SHOCK HAZARD

Failure to turn off the main (remote) electrical disconnect device could result in personal injury or
death.
Before installing, modifying or servicing system,
turn OFF the main (remote) electrical disconnect
device. There may be more than one disconnect
device. Lock out and tag switch with a suitable
warning label.

Improper installation, adjustment, alteration, service or
maintenance can void the warranty.

LOCATION
Check local codes for regulations
noise, platforms, and other issues.

concerning

zoning,

Locate unit away from fresh air intakes, vents, or
bedroom windows. Noise may carry into the openings
and disturb people inside.
Locate unit in a well drained area, or support unit high
enough so that water runoff will not enter the unit.
Locate unit away from areas where heat, lint, or exhaust
fumes will be discharged onto unit (as from dryer vents).

Locate unit away from recessed or confined areas where
recirculation of discharge air may occur (refer to
CLEARANCES section of this document).
Roof-top installation is acceptable providing the roof will
support the unit and provisions are made for water
drainage and noise/vibration dampening.
NOTE: Roof mounted units exposed to wind may require
wind baffles. Consult the manufacturer for additional
information.

CLEARANCES
Nominal minimum clearances are 48 inches (1.2m)
above unit for discharge air and 18 inches (457mm) on
each side of the coil for intake air. Clearance on any one
side of the coil (normally between unit and structure) may
be reduced to 6 inches (152mm). Nominal minimum
clearances are based on a solid parallel object such as a
wall or roof overhang.
The clearance may be reduced for a single object with
small surface area, such as the end of a wall, outside
corner of a wall, fence section, post, etc. As a general
rule, the minimum clearance from the unit should equal
the width of the object. For example, a 6 inch (152mm)
fence post should be a minimum of 6 inches (152mm)
from the unit.

Do not install unit under roof overhangs unless gutters are
present. A minimum vertical clearance of 48 inches
(1.2m) is required to the overhang.
Inside corner locations on single story structures require
evaluation. Large overhanging soffits may cause air
recirculation in a corner area even though recommended
minimum clearances are maintained. As a guide, locate
the unit far enough out so that half of the discharge grille is
out from under the soffit.
When placing two or more units side-by-side, provide a
minimum of 18 inches (457mm) between units.
Provide minimum service clearance of 24 inches
(610mm) from control box corner and side service panel.
Refer to Figure 1.

421 01 5002 01

Figure1

Clearances (various examples)

(152mm)

24"

(610mm)

Service
24"

18"

(610mm)

(457mm)

Service

18"

(457mm)
18"

(457mm)

(152mm)

24"
(610mm)

18"

24"

18"

(152mm)

(610mm)

(457mm)

Service
Service

!\"

\
4"
,,

(102mm}

(102mm)

wide fence

24"

(610mm)

Service

Service
24"

(610mm)
Service
24"

18"

(457mm)

421 01 5002 01

18"

(457mm)

(457mm)
18"

UNIT SUPPORT
NOTE: Unit must be level + 2 degrees {% inch rise or fall
per foot of run (10mm rise or fall per 305 mm of run) } or
compressor may not function properly.
A. GROUND LEVEL INSTALLATION

PROPERTY DAMAGE HAZARD

The unit must be level and supported above grade by
beams, platform, or a pad. Platform or pad can be of open
or solid construction but should be of permanent
materials such as concrete, bricks, blocks, steel, or
pressure- treated timbers approved for ground contact.
Soil conditions must be considered so that the platform or
pad does not shift or settle and leave the unit partially
supported. Minimum pad dimensions are shown in Figure
2.

Failure to follow this caution may result in property damage.

If beams or an open platform are used for support, it is
recommended that the soil be treated or area be graveled
to reduce the growth of grasses and weeds.

3/8"(10mm) dia. Tie Down Knockouts
In Base Pan (2 places)

Inadequate unit support
may cause excessive
vibration, noise, and/or stress on the refrigerant
lines, leading to refrigerant line failure.
Figure 2

Tie Down Knockouts
View From Top I

To minimize vibration or noise transmission,
it is
recommended that supports not be in contact with the
building structure. However, slabs on grade constructions
with an extended pad are normally acceptable.
Base
Pan
Depth

B. ROOF TOP INSTALLATION
This type of installation is not recommended on wood
frame structures where low noise levels are required.
Supporting structure or platform for the unit must be level.
If installation is on a fiat roof, locate unit minimum 6 inches
(152mm) above roof level.
Place the unit over one or more load bearing walls. If there
are several units, mount them on platforms that are
self-supporting
and span several load bearing walls.
These suggestions are to minimize noise and vibration
transmission through the structure. If the structure is a
home or apartment, avoid locating the unit over
bedrooms or study.
NOTE: When unit is to be installed on a bonded
guaranteed roof, a release must be obtained from the
building owner to free the installer from all liabilities.
C. FASTENING

UNIT DOWN

If conditions or local codes require the unit be attached in
place, remove the knockouts in the base pan and install
tie down bolts through the holes (refer to Figure 2).
Contact local distributor for hurricane hold-down details
and the P.E. (Professional Engineer) certification, when
required.

REFRIGERATION
A. COMPONENT

A
Base Pan Width

Base Pan
Width x Depth
23 x 23
(584 x 584)
251¼6 x 251¼6
(652 x 652)
31Y8 x 31Y8
(791 x 791)
3415A6x 3415A6
(887 x 887)

Inches (mm)
Tie Down
Knockouts
A
73A
(197)
91A6
(230)
91A6
(230)
91A6
(230)

B
47A6
(113)
47A6
(113)
6Y2
(165)
6Y2
(165)

C
18
(457)
21¼
(540)
245/8
(625)
287A6
(722)

Minimum
MountingPad
Dimensions
23 x 23
(584 x 584)
26 x 26
(660 x 660)
31Y2x 31Y2
(800 x 800)
35 x 35
(889 x 889)

SYSTEM

MATCHES

Check to see that the proper system components are in
place, especially the indoor coil.
R-22 outdoor units can only be used with R-22 specific
indoor coils. If there is a refrigerant mis-match, consult
the indoor coil manufacturer to determine if a refrigerant
conversion kit is available for the indoor coil.
This outdoor unit is designed for use only with indoor coils
that utilize a TXV refrigerant metering device. If any other
type of metering device is installed on the indoor coil,
consult the indoor coil manufacturer to determine if a TXV
conversion kit is available.
4

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Indoor coil and outdoor unit must be listed as a
certified combination (match) in the ARI Unitary
Directory of Certified Products.
When installing a TXV on an indoor coil, follow the
instructions provided with the new TXV.
421 01 5002 01

A typical TXV installation is shown in Figure 3.
Figure 3

Typical TXV Installation

PERSONALINJURY

HAZARD

Failure to relieve system pressure could result in
personal injury and/or death.
Relieve pressure and recover all refrigerant before
servicing existing equipment, and before final unit
disposal. Use all service ports and open all flowcontrol devices, including solenoid valves.

EQUALIZER
TUBE

SUCTION

SENSING
BULB

STRAP

(EITHE_

B. REFRIGERANT

SUSPENDING

REFRIGERANT

When routing refrigerant lines through a foundation or
wall, do not allow refrigerant lines to come in direct
contact with the building structure. Make openings large
enough so that lines can be wrapped with extra insulation.
Fill all gaps with RTV caulk. This will prevent noise
transmission between the tubing and the foundation or
wall.

TXV

8 O'CLOCK

AND

Run refrigerant lines as straight and direct as possible,
avoiding unnecessary bends and turns. Always insulate
the entire suction line. Both lines should be insulated
when routed through an attic or when routed through an
underground raceway.

LIQUID
TUBE

SENSING BULB

C. ROUTING
LINES

4 O'CLOCK

Along floor or ceiling joists, suspend refrigerant lines so
that they do not contact the building structure, water
pipes, or ductwork. Use insulated or suspension type
hangers. Metal straps must be at least 1" (25mm) wide to
avoid cutting into the tube insulation. Keep the liquid and
suction lines separate. Refer to Figure 4.

LINE SETS

The refrigerant line set must be properly sized to assure
maximum efficiency and proper oil circulation.
Refer to Product Specifications
and Long
Applications Guideline for line set sizing.

Line

UNIT OPERATION HAZARD

NOTE: Total line set length must not exceed 200 feet
(61m).

Failure to follow this caution may result in improper product operation.

A crankcase heater must be used when the refrigerant
line length exceeds 80 feet (24.4m).

Do not leave system open to atmosphere any longer than absolutely required for installation. Internal system components - especially refrigerant
oils - are extremely susceptible to moisture contamination. Keep ends of tubing sealed during
installation until the last possible moment.

If outdoor unit is more than 10 feet (3m) higher than the
indoor coil, refer to the Long Line Applications Guideline
manual for instructions.
When the outdoor unit is higher than the indoor coil, the
vertical separation must not exceed 100 feet (30m).
When the outdoor unit is lower than the indoor coil, the
vertical separation must not exceed 50 feet (15.2m).
If it is necessary to add refrigerant line in the field, use
dehydrated
or dry, sealed,
deoxidized,
copper
refrigeration tubing. Do not use copper water pipe.
Do not remove rubber plugs or caps from copper tubing
until connections are ready to be made.
Be extra careful when bending refrigeration tubing.
Tubing can "kink" easily, and if this occurs, the entire
length of tubing must be replaced.

421 01 5002 01

Figure4

Routing and Suspending

O TO
C
I_"_

__r

Refrigerant Lines

HANGER STRAP
(AROUND
SUCTION
TUBE ONLY)

r
X..

JOIST

-_.J

LIQUID TUBE

S;'cTA:'oO2T

S CTO,

h
1" (25mm) MIN -_D,-I

I_
LIQUID TUBE

THROUGH

THE WALL

SUSPENSION

Figure 5

Liquid Line Filter-Drier
Installed at Indoor Coil

UNIT OPERATION HAZARD
Failure to follow this caution may result in improper product operation.
Do not bury more than 36" (lm) of line set underground. Refrigerant may migrate to cooler buried
section during extended periods of unit shutdown, causing refrigerant slugging and possible
compressor damage at start-up.
If ANY section of the line set is buried underground, provide a minimum 6"(152mm) vertical
rise at the service valve.
D. OUTDOOR

UNIT HIGHER THAN INDOOR UNIT

Proper oil return to the compressor should be maintained
with suction gas velocity. If velocities drop below 1500
fpm (feet per minute), oil return will be decreased. To
maintain suction gas velocity, do not upsize vertical
suction risers.

E. LIQUID LINE FILTER-DRIER
Outdoor units are shipped with an appropriate filter-drier
for installation in the liquid line. Leave the plugs in the tube
ends until the filter-drier is installed. The optimal location
for the filter-drier is close to the indoor coil. Install the
filter-drier with the arrow pointing towards the indoor coil.
Refer to Figure 5.
Filter-Drier
(arrow points towards indoor coil)

38-11-84

421 01 5002 01

F, SERVICE
VALVES

H. EVACUATING LINE SET AND INDOOR COIL

Service valves are closed and tube stubs are plugged
from the factory. Outdoor units are shipped with a
refrigerant charge sealed in the unit. Leave the service
valves closed until all other refrigerant system work is
complete or the charge will be lost. Leave the plugs in
place until line set tubing is ready to be inserted.

The unit is shipped with a factory refrigerant charge. The
liquid line and suction line service valves have been
closed after final testing at the factory. Do not disturb
these valves until the line set and indoor coil have been
evacuated and leak checked, or the charge in the unit
may be lost.

Service valve bodies are brass and tube stubs are copper.

NOTE: Do not use any portion of the factory charge for
purging or leak testing. The factory charge is for filling the
system only after a complete evacuation and leak check
has been performed.

Figure 6

Service Valve

,,L

PRODUCT DAMAGE HAZARD
VALVE CORE X

Failure to follow this caution may result in product
damage.
Never use the outdoor unit compressor as a vacuum pump. Doing so may damage the compressor.

G. BRAZING CONNECTIONS
NOTE: Remove valve core from schrader port on both
Service Valves BEFORE brazing. This helps prevent
overheating and damage to valve seals (refer to Figure 6).
Replace valve core when brazing is completed.

FIRE HAZARD
Failure to remove refrigerant and oil charge before
brazing could result in personal injury, death, and/
or property damage.
Refrigerant and oil mixture could ignite and burn
as it escapes and contacts brazing torch. Make
sure the refrigerant charge is properly removed
from both the high and low sides of the system before brazing any component or lines.

Line set and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. If
deep vacuum equipment is not available, the alternate
triple evacuation method may be used by following the
specified procedure.
If vacuum must be interrupted during the evacuation
procedure, always break vacuum with dry nitrogen.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump
capable of pulling a vacuum to 500 microns and a vacuum
gauge capable of accurately measuring this vacuum
level. The deep vacuum method is the most positive way
of assuring a system is free of air and water.
Watch the vacuum gauge as the system is pulling down.
The response of the gauge is an indicator of the condition
of the system (refer to Figure 7).
With no leaks in the system, allow the vacuum pump to
run for 30 minutes minimum at the deep vacuum level.
Figure 7

Clean line set tube ends with emery cloth or steel brush.
Remove any grit or debris.
Insert line set tube ends into service valve tube stubs.

Deep Vacuum Gauge Response
and System Conditions

5000

Apply heat absorbing paste or heat sink product between
service valve and joint. Wrap service valves with a heat
sinking material such as a wet cloth.

4500

Braze joints using a SiI-Fos or Phos-copper

3000

4000
LEAKIN
SYSTEM

3500

alloy.

2500
o
2000
VACUUM TIGHT
TOO WET

1500

PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.

1000
TIGHT
DRY SYSTEM

500

Braze with SiI-Fos or Phos-copper
alloy on copper-to-copper
joints and wrap a wet cloth around
rear of fitting to prevent damage to TXV.

421 01 5002 01

3
4
MINUTES

TripleEvacuationMethod
The triple evacuation method should only be used when
system does not contain any water in liquid form and
vacuum pump is only capable of pulling down to 28 inches
of mercury (711mm Hg). Refer to Fig.8 and proceed as
follows:
1.

Pull system down to 28 inches of mercury
(711 mm Hg) and allow pump to continue operating
for an additional 15 minutes.

NOTE: Open the Suction service valve first. If the Liquid
service valve is opened first, oil from the compressor may
be drawn into the indoor coil TXV, restricting refrigerant
flow and affecting operation of the system.
Remove Suction service valve cap and insert a hex
wrench into the valve stem. Hold the valve body steady
with an end-wrench and back out the stem by turning the
hex wrench counterclockwise. Turn the stem until it just
contacts the rolled lip of the valve body.

Close manifold valves or valve at vacuum pump
and shut off vacuum pump.

Connect a nitrogen cylinder and regulator to
system and fill with nitrogen until system pressure
is 2 psig.

NOTE: These are not back-seating valves. It is not
necessary to force the stem tightly against the rolled lip.

Close nitrogen valve and allow system to stand for
1 hour. During this time, dry nitrogen will diffuse
throughout the system absorbing moisture.

The service valve cap is a primary seal for the valve and
must be properly tightened to prevent leaks. Make sure
cap is clean and apply refrigerant oil to threads and
sealing surface on inside of cap.

Repeat this procedure as indicated in Figure 8.
After the final evacuate sequence, confirm there
are no leaks in the system. If a leak is found, repeat
the entire process after repair is made.

Figure 8

Triple Evacuation Sequence
IEvAcuATE

After the refrigerant charge has bled into the system,
open the Liquid service valve.

Tighten cap finger tight and then tighten additional Y6of a
turn (1 wrench fiat) to properly seat the sealing surfaces.
J. GAUGE PORTS
Check for leaks at the schrader ports and tighten valve
cores if necessary. Install plastic caps finger tight.

[BREAK VACUUM WITH DRY NITROGEN

]

IEVAc UATE I

[BREAK
WOUUM
WITH
DRY
N,TROGEN
1
IEVAc UATE I
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
CHARGE SYSTEM

]

I. OPENING SERVICE VALVES
Outdoor units are shipped with a refrigerant charge
sealed in the unit. Opening the service valves releases
this charge into the system.

421 01 5002 01

ELECTRICAL

WIRING
Wiring

ELECTRICAL

SHOCK HAZARD

Failure to turn off the main (remote) electrical disconnect device could result in personal injury or
death.

Route electrical supply (Line Voltage) wiring through
knockout hole in bottom of Control Box. Connect wires to
Contactor and Ground Lug according to Wiring Diagram
on unit. Also refer to Figure 9.

Before installing, modifying or servicing system,
turn OFF the main (remote) electrical disconnect
device. There may be more than one disconnect
device.
The supply voltage must be 208/230 volts (197 volt
minimum to 253 volts maximum) 60 Hz single phase.
Outdoor units are approved for use with
conductors only. Do not use aluminum wire.

copper

Refer to unit rating plate for minimum circuit ampacity and
circuit protection requirements.
Grounding
Permanently ground unit in accordance with the National
Electrical Code and local codes or ordinances. Use a
copper conductor of the correct size from the grounding
lug in control box to a grounded connection in the service
panel or a properly driven and electrically grounded
ground rod.

Figure 9

Connections

Make all outdoor electrical supply (Line Voltage)
connections with raintight conduit and fittings. Most
codes require a disconnect switch outdoors within sight of
the unit. Consult local codes for special requirements.

Route thermostat wiring through rubber grommet in
bottom of Control Box. Low voltage lead wires are
provided in the control box for connection to thermostat
wires (use wire nuts). Refer to Wiring Diagram on unit and
Figure 10 for low voltage wiring examples.
NOTE: Use No. 18 AWG (American Wire Gage)
color-coded,
insulated (35 °C minimum) wire. If
thermostat is located more than 100 feet (31 m) from unit
as measured along the control voltage wires, use No. 16
AWG color-coded wires to avoid excessive voltage drop.
NOTE: Some models are factory equipped with Comfort
Alert
Diagnostics device. If Comfort Alert is used as a
field installed option, then a hot bundle must be run for
proper connection.
TM

Electrical Supply (Line Voltage)

Connections

DISCONNECT
PER NEC AND/OR
LOCAL CODES

CONTACTOR
L1

FIELD POWER
WIRING

FIELD GROUND
WIRING

421 01 5002 01

Ij2_or 13

<_)

-®
j

GROUND
LUG

Figure10

Typical Thermostat Connections
THERMOSTAT

24 VAC HOT

24 VAC COM

FURNACE

E_-

AIR CONDITIONER

--I-q
-

-D

......

-D

HEAT STAGE 1

i
i

COOL STAGE 1

INDOOR

.....

-D

FAN

THERMOSTAT

AIR CONDITIONER

FAN COIL

24 VAC HOT

--F-I

24 VAC COM

- -D

......

i
i

HEAT STAGE 1

v
I

--[_-

COOL STAGE 1

INDOOR

FAN

.....

-D

THERMOSTAT

AC with Comfort Alert

FAN COIL

24 VAC HOT

....

24 VAC COM

....

HEAT STAGE 1

COOL STAGE 1

INDOOR

FAN

.....

421 01 5002 01

START-UP

PROCEDURE

Set indoor thermostat selector switch to OFF.

Turn ON all electrical disconnect devices.

If unit has a crankcase heater, energize the heater
and wait 24 hours before proceeding.

REFRIGERANT

Set indoor thermostat at desired temperature. Be
sure setpoint is below indoor ambient temperature
or thermostat will not call for cooling.
Set indoor thermostat selector switch to COOL.
Operate unit for minimum 15 minutes, then check
system refrigerant charge.

CHARGE

Outdoor units are shipped with a refrigerant charge to
match a specific
indoor coil and 15 feet (4.6m) of
refrigerant line. If shorter or longer refrigerant lines or a
different indoor coil are used, the charge will have to be
adjusted.
For different line lengths,
0.6 ounces (17g) charge
For example, a 25 foot
longer than the specified
(17g) charge for each of

add or remove charge based on
per foot (305mm) of difference.
(7.6m) line set is 10 feet (3m)
15 feet (4.6m). Add 0.6 ounces
the extra 10 feet (3m):

NOTE: When adding refrigerant, charge
form, using a flow restricting device,
suction port.
If the measured liquid line temperature
than the chart number, reclaim refrigerant
the measured temperature.
Tolerance is + 3°F (+1.7°C).

in liquid
into the
is lower
to raise

10 x 0.6 = 6.0 ounces additional charge
(3m x 17g = 51g additional charge)
This outdoor unit is designed for use only with indoor coils
that utilize a TXV refrigerant metering device. With an
indoor TXV, use the subcooling method to make final
charge adjustments:
NOTE: Only use subcooling charging method when
• outdoor ambient temperature is between 70°F and 100°F
(21 °C and 38°C)
• indoor temperature is between 70 ° and 80°F
(21 °C and 27°C)
• line set is less that 80 feet (24.4m).
1.

Operate unit a minimum of 15 minutes before
checking charge.
NOTE: If outdoor unit has a 2-speed fan motor,
motor will operate in low speed when outdoor
ambient temperature is below 82°F (28°C). Pull
one of the yellow low voltage wires off the fan
control and the unit will default to high speed fan for
servicing. Reconnect wire after servicing.

Measure liquid service valve pressure by attaching
an accurate gauge to service port.

Measure liquid line temperature by attaching an
accurate thermistor type sensor or electronic
thermometer to liquid line near outdoor coil.

Refer to unit rating plate for required subcooling
temperature.

Refer to Figure 11. Find the required liquid line
temperature where the rating plate subcooling
temperature intersects measured liquid service
valve pressure.

If the measured liquid line temperature is higher
than the chart number, add refrigerant to lower the
measured temperature.

421 01 5002 01

Figure11
oF
Measured Liquid
Pressure (psig)

R-22 Required Liquid Line Temperature °F (°C)
78
73

163

171

179

187

196

205

214

101

223

104

233

107

102

243

110

105

IO0

253

113

108

103

264

116

111

106

101

274

119

114

109

104

285

122

117

112

107

297

125

120

115

110

309

Rating Plate (required) Subcooling Temperature °F (oC)
oF
oF
oF

128

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iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_!_!_!_!_!_!_!_!_!_!_!
113
123
118

421 01 5002 01

SEQUENCE

OF OPERATION

With power supplied to indoor
transformer is energized,

and outdoor

units,

On a call for cooling, the thermostat makes circuits R-Y
and R-G. Circuit R-Y energizes contactor, starting
outdoor fan motor and compressor.
Circuit R-G
energizes indoor unit blower relay, starting indoor blower
motor.

When thermostat
is satisfied, its contacts open,
de-energizing contactor and blower relay. Compressor
and motors stop.
NOTE: If indoor unit is equipped with a time-delay relay
circuit, the blower runs an additional length of time to
increase system efficiency.

TROUBLESHOOTING
Some models are factory equipped with the Comfort
Alert
Diagnostics device in the control box (refer to
Figure 12). Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects, and broad system faults. If trouble is detected, an
alert code is displayed with a flashing LED indicator. Alert
codes are listed in Figure 13.
TM

Figure 12

Comfort Alert
Diagnostics
(some models)
TM

Compressor Wires
Through Holes (3)

The device
is factory
wired and requires
no
modification.
Low voltage lead wires are provided in the
control box for connection to thermostat wires (use wire
nuts).
The Comfort Alert device operates by monitoring the
compressor power leads and the thermostat demand
signal (Y terminal).

MAINTENANCE
Condensate Drain
During the cooling season, check monthly for free flow of
drainage and clean if necessary.
Cleanliness
These tips will help keep the air conditioner looking better
and working more efficiently:
,

Free flow of air is essential. Keep fences, shrubs,
trash cans, and other obstructions at least 18
inches (457mm) from all coil inlets.
Keep the coil free of grass clippings, leaves,
weeds, and other debris.
NOTE: Coil may occasionally require cleaning with
a liquid solution. The coil must be cold when
cleaning. Use an alkaline based cleaner only.
Cleaning a hot coil or using an acid based cleaner
will remove the paint from the fins and may clog the
coil.
Never use a weather cover over the outdoor unit
unless it is a ventilated type or made of breathable
fabric that will allow moisture to evaporate rapidly.
A cover that holds moisture in the unit will cause
more rust build-up and damage than normal
exposure to weather.

421 01 5002 01

Figure13
StatusLED
Green"POWER"
Red "TRIP"

Comfort Alert
Status LED Description
Module has power
Thermostat demand signal
Y1 is present, but the
compressor is not running

Diagnostics (some models)

Status LED Troubleshooting Information
Supply voltage is present at module terminals
1. Compressor protector is open
2. Outdoor unit power disconnect is open
3. Compressor circuit breaker or fuse(s) is open
4. Broken wire or connector is not making contact
5. Low pressure switch open if present in system
6. Compressor contactor has failed open

Yellow "ALERT"
Flash Code 1

Long Run Time
Compressor is running
extremely long run cycles

Yellow "ALERT"
Flash Code 2

System Pressure Trip
Discharge or suction
pressure out of limits or
compressor overloaded

Yellow "ALERT"
Flash Code 3

Short Cycling
Compressor is running
only briefly

Yellow "ALERT"
Flash Code 4

Locked Rotor

1• Low refrigerant charge
2. Evaporator blower is not running
3. Evaporator coil is frozen
4. Faulty metering device
5. Condenser coil is dirty
6. Liquid line restriction (filter drier blocked if present in system)
7. Thermostat is malfunctioning
1• High head pressure
2. Condenser coil poor air circulation (dirty, blocked, damaged)
3. Condenser fan is not running
4. Return air duct has substantial leakage
1• If high pressure switch open, go to Flash Code 2 information
2. If low pressure switch open, go to Flash Code 1 information
3. Thermostat demand signal is intermittent
4. Loose wiring at contactor coil
1• Run capacitor has failed
2. Low line voltage (contact utility if voltage at disconnect is low)
3. Excessive liquid refrigerant in compressor
4. Compressor bearings are seized

Yellow "ALERT"
Flash Code 5

Open Circuit

1• Outdoor unit power disconnect is open
2. Compressor circuit breaker or fuse(s) is open
3. Compressor contactor has failed open
4. High pressure switch is open and requires manual reset
5. Open circuit in compressor supply wiring or connections
6. Unusually long compressor protector reset time due to
extreme ambient temperature
7. Compressor windings are damaged
1• Run capacitor has failed
2. Open circuit in compressor start wiring or connections
3. Compressor start winding is damaged

Yellow "ALERT"
Flash Code 6

Open Start Circuit
Current only in run circuit

Yellow "ALERT"
Flash Code 7

Open Run Circuit
Current only in start circuit
Low Voltage

1• Open circuit in compressor run wiring or connections
2. Compressor run winding is damaged
1. Control circuit transformer is overloaded

Control circuit < 17VAC

2. Low line voltage (contact utility if voltage at disconnect is low)

Yellow "ALERT"
Flash Code 9

• Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated•
• TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation•

International Comfort Products, LLC
Lewisburg, TN 37091 USA

421 01 5002 01

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ICP C2A318GKA100 User Manual AIR CONDITIONER Manuals And Guides L0909278

ICP Air conditioner/heat pump(outside unit) Manual L0909278 ICP Air conditioner/heat pump(outside unit) Owner's Manual, ICP Air conditioner/heat pump(outside unit) installation guides

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