Carrier 40Qnc Users Manual Q 9SI

40QNC to the manual dc7342a5-a949-4805-ba10-f9c82f673d2f

2015-01-24

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40QNC / 38HDF

40QNQ / 38QRF

High---Wall Duct Free Split System

Sizes 018 to 036

Installation Instructions

40QNC, QNQ Unit

NOTE: Read the entire instruction manual before starting the

installation.

!WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury or

equipment damage.

Puron refrigerant systems operate at higher pressures than

standard R--22 systems. To avoid damage to the unit or

possible personal injury, do not use R--22 service equipment or

components on Puron refrigerant equipment.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes and

current editions of the National Electrical Code ( NEC ) NFPA 70.

In Canada, refer to current editions of the Canadian electrical code

CSA 22.1.

Recognize safety information. This is the safety--alert symbol !!

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand

these signal words; DANGER, WARNING, and CAUTION. These

words are used with the safety--alert symbol. DANGER identifies

the most serious hazards which will result in severe personal injury

or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe

practices which would result in minor personal injury or product

and property damage. NOTE is used to highlight suggestions

which will result in enhanced installation, reliability, or operation.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF

position. There may be more than 1 disconnect switch.

Lock out and tag switch with a suitable warning label.

PERSONAL INJURY AND EQUIPMENT DAMAGE

HAZARD

Failure to follow this caution may result in personal injury

and / or equipment damage.

DO NOT operate the unit without a filter or with grille

removed.

CAUTION

DIMENSIONS -- INDOOR

A08433

Model Size W

In. (mm)

Operating Weight

lb (kg)

18k 42.5 (1080) 11.6 (295) 7.9 (201) 31 (14.1)

24k 42.5 (1080) 11.6 (295) 7.9 (201) 31 (14.1)

30k 57.5 (1461) 13.4 (340) 9.5 (241) 51 (23.2)

36k 57.5 (1461) 13.4 (340) 9.5 (241) 51 (23.2)

Fig. 1 -- 40QNC,QNQ Unit Dimensions

DIMENSIONS -- OUTDOOR

(FIELD PROVIDED AND INSTALLED)

NOTE: Dimensions shown in feet-inches. Dimensions in ( ) are millimeters.

UNIT MODELS CHASSIS

SIZE

(Reference)

ABCD E FG H J KL NP

38HDF

Unit Size

38QRF

Unit Size

018 018 02′-1

″3′-0

″1′-2

″1′-4″1′-11

″1′-5

″1′-10″1′-1″0′-6

″0′-11

″0′-2

″0′-6″

(638.2) (938.2) (369.9) (406.4) (595.3) (436.6) (435) (559.1) (330.2) (168.3) (285.8) (75) (152.4)

024,030 024 0.6 2′-7

″3′-0

″1′-2

″1′-4″1′-11

″1′-5

″1′-11

″2′-4″1′-2″0′-6

″0′-11

″0′-2

″0′-6″

(790.6) (938.2) (369.9) (406.4) (595.3) (436.6) (587.4) (711.5) (355.6) (171.5) (295.3) (75) (152.4)

036 030,036 1.0 3′-1

″3′-8

″1′-5

″1′-6

″2′-6

″1′-7

″2′-5

″2′-10

″1′-1

″0′-8

″1′-3

″0′-3

″0′-6

″

(944.6) (1131.9) (433.4) (468.3) (774.7) (498.5) (741) (865.5) (347.7) (206.4) (403.2) (88) (165.4)

UNIT SIZE M OPERATING WT

in. mm lb kg

38HDF

018

15.88 166 75.3

024

15.88 176 79.8

030

19.05 187 84.8

036

19.05 250 113.4

* Male flare connection for Heat Pumps

FEMALE SWEAT CONN.*

38QRF

018

15.88 166 75.3

024

15.88 176 79.8

030

19.05 187 84.8

036

19.05 232 105.2

A08434

Fig. 2 -- 38HDF, QRF Unit Dimensions

CLEARANCES -- INDOOR

min.

4in.

80 in.

8in.

A08357

Fig. 3 -- 40QNC,QNQ Unit Clearances

CLEARANCES -- OUTDOOR

Air-inlet

Air-outlet

A08436

UNIT Coil Facing Wall --- in. (mm) Fan Facing Wall --- in. (mm)

A24 (610) 24 (610)

B36 (914) 36 (914)

C36 (914) 8 (203)

D6 (152) 8 (203)

E6 (152) 36 (914)

Fig. 4 -- Outdoor Unit Clearance

These installation instructions cover the installation of the matched

systems listed in table 2.

Parts List

Indoor Unit

The following items are included with the indoor unit:

Table 1 – Installation Materials

Description Qty Usage

Wall Mounting

Bracket 1For Indoor Unit Installation

Screws, 4XL10 2For Attaching The Remote Control

Holder To The Wall

Screws, 5XL25 5/14* For Attaching The Mounting Bracket To

The Wall

Remote Control 1For Controlling Unit

Remote Control

Holder 1Holder For Remote Control

* 5 screws for unit sizes 18 and 24. 14 screws for unit sizes 30 and 36.

Outdoor Unit

The following items are included with the outdoor unit:

38HDF018-036

A09499

Fig. 5 -- 38HDF018--036

A09500

Fig. 6 -- 38QRF018--036

Model Filter Drier Piston

Cap Pistons* Flare

Connector

38HDF n n n n

38QRF n n (qty 2) n n (qty 3)

* Multiple pistons. Quantity varies with size.

Table 2 – Matched Systems

System

Ty p e

Nominal

Capacity

Outdoor

Unit

Indoor

Unit

Cooling

Only

018 3 8 H D F 0 1 8 --- --- --- 3 40QNC018024--- --- ---3

024 3 8 H D F 0 2 4 --- --- --- 3 40QNC018024--- --- ---3

030 3 8 H D F 0 3 0 --- --- --- 3 4 0 Q N C 0 3 0 --- --- --- 3

036 38HDF036--- --- ---3/5/6 4 0 Q N C 0 3 6 --- --- --- 3

Heat

Pump

018 3 8 Q R F 0 1 8 --- --- --- 3 4 0 QN Q 0 1 8 --- --- --- 3

024 3 8 Q R F 0 2 4 --- --- --- 3 4 0 QN Q 0 2 4 --- --- --- 3

030 3 8 Q R F 0 3 0 --- --- --- 3 4 0 QN Q 0 3 0 --- --- --- 3

036 38QRF036--- --- ---3/5/6 4 0 Q N Q 0 3 6 --- --- --- 3

SYSTEM REQUIREMENTS

Clearances

Allow sufficient space around the indoor and outdoor unit for

proper airflow circulation and servicing. Refer to Fig. 3 and Fig. 4

for minimum required clearances.

Piping: Piping and insulation is field supplied.

Piping Lengths

The minimum length between the indoor and outdoor units is 10 ft

(3 m). Refer to table 3 for the maximum lengths allowed.

Table 3 – Maximum Refrigerant Line Lengths

Unit

Size

Max Line

Length ft(m)

Max Elevation (ID

over OD) ft(m)

Max Elevation (OD

over OD) ft(m)

18K 200 (61) 65 (19.8) 200 (61)

24K 200 (61) 65 (19.8) 200 (61)

30K 200 (61) 65 (19.8) 200 (61)

36K 200 (61) 65 (19.8) 200 (61)

Note:For lengths greater than 25 ft (7.6 m), refer to the Duct Free Long

Line Guide.

Pipe Sizes

Refer to table 4 for pipe sizes.

Table4–PipeSizes

Pipe Sizes (in)

Unit Size M i x P h a s e --- i n Vapor --- in

18K 3/8 5/8

24K 3/8 5/8

30K 3/8 3/4

36K 3/8 3/4

Note:Both lines need to be insulated using at least 1/2 inch closed foam

insulation.

Condensate Drain Pipe Sizes

Refertotable5fortherequiredsizes.

Table 5 – Drain Pipe Sizes

Unit Size Outside Diameter --- in Inside Diameter --- in

18K 5/8 7/16

24K 5/8 7/16

30K 3/4 5/9

36K 3/4 5/9

Note:Do not trap condensate pipe.

Refrigerant Charge

The 38HDF and 38QRF units can be matched with multiple

outdoor units and thus additional charge might be required when

matched with the 40QNC or 40QNQ units.

Table 6 – Additional Charge

Additional Charge lb (kg)

Unit Size 38HDF 38QRF

018 1.2 (0.55) 0.8 (0.36)

024 1.0 (0.45) 0.5 (0.23)

030 2.4 (1.1) 0

036 0 0

Note:The above additional charge is required amount for line lengths up to

25 ft (7.6 m). For line lengths exceeding 25 ft (7.6 m), additional charge will

be required. Refer to the Duct Free Splits Long Line Guide.

Metering Device

The metering device(s) for these systems is a type B Accurator

installed with the outdoor unit. One Accurator is required for the

cooling only system and two are required for the heat pump

systems. The Accurators are supplied with the outdoor unit.

However, since the same outdoor unit can be matched with

multiple indoor units, the correct Accurator must be selected. Refer

to Table 7 for the correct Accurator size.

Table 7 – Accurator Sizes

System Type Size Cooling

Accurator

Heating

Accurator

Cooling Only

018 49 ---

024 55 ---

030 63 ---

036 70 ---

Heat Pumps

018 49 45

024 55 49

030 63 53

036 70 63

Power and Connecting Cables -- Field Supplied

Power:

SThe indoor and outdoor units require a dedicated power supply.

SConsult local building codes, NEC (National Electric Code) or

CEC (Canadian Electric Code) for any special requirements.

SUse Table 8 for the electrical requirements for the outdoor units

and Table 9 for the indoor units to correctly size the cables and

disconnect switches.

Table 8 – 38HDF / QRF Electrical Requirements

Unit

Size Voltage

38HDF 38QRF

Min Ckt Amps/

Fuse HACR Bkr

Amps

Min Ckt Amps/

Fuse HACR Bkr

Amps

018 208/230---1---60 12.1/20 12.1/20

024 208/230---1---60 16.8/25 16.8/25

030 208/230---1---60 18.4/30 18.4/30

036 208/230---1---60 23.8/40 23.8/40

036 208/230---3---60 18.0/30 18.0/30

036 4 6 0 --- 3 --- 6 0 8.3/15 8.3/15

Table 9 – 40QNC / QNQ Electrical Requirements

Unit

Size Voltage

40QNC 40QNQ

Min Ckt Amps/

Fuse HACR Bkr

Amps

Min Ckt Amps/

Fuse HACR Bkr

Amps

018 208/230---1---60 0.48/15 0.48/15

024 208/230---1---60 0.48/15 0.48/15

030 208/230---1---60 0.48/15 0.48/15

036 208/230---1---60 0.55/15 0.55/15

Control Wiring

Thermostat wires should be used for control wiring between the

indoor and outdoor units. A two conductor cable is required for

the cooling only units and a seven conductor cable is required on

heat pumps. 18 AWG is recommended for any length up to 50 ft

(15.2 m). 16 AWG is recommended for lengths between 50 and

200 ft (15.2 and 61.0 m).

User Interface

The indoor unit is supplied with a wireless remote control. The

following accessories are also available

SWall mounted control. Up to 6 units can be daisy chained and

controlled by one wired control.

SZone manager capable of controlling up to 32 units divided up

to 8 different zones.

Operating Range

Ensure that the system operates within the application guidelines

shown in Table 10.

Cooling Operating Range

Maximum Minimum

DB ° F (° C) WB ° F (° C) DB ° F (° C) WB ° F (° C)

Outdoor

Unit 125 (51.7) --- --- 55 (12.8) --- ---

Indoor

Unit 90 (32.2) 74 (23.3) 62 (17.0) 56 (13)

Heating Operating Range

Maximum Minimum

DB ° F (° C) WB ° F (° C) DB ° F (° C) WB ° F (° C)

Outdoor

Unit 75 (23.9) 67 (19.4) 17 (---8.3) --- ---

Indoor

Unit 81 (27.2) --- --- 62 (17.0) --- ---

Accessories

An extensive list of field installed accessories is available for both

indoor and outdoor units. Identify what accessories, if any, are

required for the application at hand and consult the separate

installation instructions for the accessories. Some of the

accessories, especially on the indoor units, can be installed much

easier if planned ahead.

INSTALLATION

Complete Pre--installation Checks

1. Unpack Unit -- Store the indoor and outdoor units in the

original packaging until it is moved to the final site for in-

stallation.

2. Inspect Shipment -- Upon receipt of shipment, check the

indoor and outdoor units for damage. If there is any dam-

age, forward claim papers directly to the transportation

company. Manufacturer is not responsible for damage in-

curred in transit.

3. Inspect Parts Supplied With Units – Check all items

against parts list (see Table 1). If any items are missing, noti-

fy your distributor or Carrier office. To prevent loss or

damage, leave all parts in original packages until installa-

tion.

Consider System Requirements

1. Consult local building codes and NEC for special installa-

tion requirements.

2. When deciding the location of the indoor and outdoor units,

ensure that the piping run does not exceed the allowed dis-

tances listed in Table 3.

3. Make sure the indoor and outdoor units are easily accessible

to electrical power.

4. Allow sufficient clearances for airflow, wiring, refrigerant

piping, and servicing the unit. See Fig. 3 and Fig. 4.

5. Condensate piping can be directed through the inside wall

to an approved drain or straight outside.

INSTALL INDOOR UNIT

Plan the installation carefully before you begin.

1. Select indoor unit location.

a. A location that can bear the weight of the unit.

b. Do not install indoor units near a direct source of heat

such as direct sunlight or a heating appliance.

c. Do not install units too close to humid conditions.

2. Install Mounting Plate

The factory supplied mounting plate will look like one of

the following depending on the size of the unit.

2.1"

(53.3)

14.9" (378.5)

3.5"

(88.9)

2.8"

(71.1)

2.8"

(71.1)

5.1”

(129.5)

13.8" (130.5)

(50.8)

7.7" (195.6)

35.4” (899.2)

2.1"

(53.3)

(25.4)

Note: Numbers in ( ) = mm

A09046

Fig. 7 -- 40QNC, QNQ018,024 Mounting Plate

27.1”

(688.3)

27.2”

(690.9)

8.4” (213)

Measurements in ( ) = mm

A09047

Fig. 8 -- 40QNC, QNQ030, 036 Mounting Plate

Before mounting the 40QNC, QNQ unit on the wall mounting

bracket, consider how the refrigerant piping will be routed.

Complete the following when installing the wall mounting bracket:

a. Carefully remove the mounting plate which is attached

to the back of the unit by removing any screws and

pushing at the indicated pressure points at the bottom of

the unit.

Remove Screw

A09048

Fig. 9 -- Mounting Plate Screw Location

b. The mounting plate should be located horizontally and

level on the wall. All minimum spacing shown below

should be maintained.

12”

(304.8)

min.

Plumb line

5” (127) min.

18”

(457.2)

min.

Note: Numbers in ( ) = mm

A09049

Fig. 10 -- Minimum Spacing

c. Install the wall mounting bracket in a location that is

strong enough to withstand the weight of the unit.

d. If the wall is block, brick, concrete or similar material,

drill 0.2 in (5 mm) diameter holes and insert anchors for

the appropriate mounting screws.

e. Fasten the wall hanging bracket to the wall with 4 or

more screw anchors through the holes near the outer

edge of the bracket.

f. Install the wall hanging bracket flush to the wall, and

ensure the bracket does not move.

3. Drill hole in wall for interconnecting piping, drain, and wir-

ing

Refrigerant Line Routing

Piping for indoor units can be routed as shown in Fig. 11.

A08358A

Fig. 11 -- Refrigerant Line Routing

Rear Piping

Determine the pipe hole position using the mounting plate as a

template. Drill a 2--1/2 inch (63.5 mm) diameter hole in the wall at

point A or B as shown in Fig. 12 or Fig. 13. Drill the hole at a

slope so that the outside end is 1/2 inch (13 mm) lower than inside

end to ensure optimal drainage. Refer to Fig. 14.

Side Or Bottom Piping

Remove the knockout in the unit and drill a 2--1/2 inch (63.5 mm)

hole where the pipe penetrates the structure using the guides given

above.

2.1"

(53.3)

14.9" (378.5)

3.5"

(88.9)

2.8"

(71.1)

2.8"

(71.1)

5.1”

(129.5)

13.8" (130.5)

(50.8)

7.7" (195.6)

35.4” (899.2)

2.1"

(53.3)

(25.4)

Note: Numbers in ( ) = mm

A09046

Fig. 12 -- 40QNC, QNQ018, 024 Mounting Plate

2" 5.1"

A09050

Fig. 13 -- 40QNC, QNQ030, 036 Mounting Plate

1/2 in. (13 mm)

Min.

INDOOR OUTDOOR

A07371

Fig. 14 -- Drill Hole at Slope

4. Relocate drain connection if necessary -- Determine if the

installation requires a left or a right hand drain exit and relo-

cate the drain hose if necessary as shown in Fig. 15.

Drain Hose

Drain Cap

A08362

Fig. 15 -- Drain Hose and Cap Location

NOTE: If the condensate pump accessory is to be used, the drain

hose can be cut to provide space for the space for the condensate

pump reservoir in the back of the unit. The reservoir must be

installed at this time. Please refer to installation instructions

provided with the condensate pump accessory.

5. Place unit on a clean surface until you are ready to connect

the piping and wiring.

INSTALL OUTDOOR UNIT

The outdoor units can be installed on the ground, on the roof, or

mounted on a wall.

NOTE: Install the unit so that the coil does not face into

prevailing winds. If this is not possible and constant wind winds

above 25 mph are expected, use accessory wind baffle. See

installation instructions provided with accessory kit. Wind baffles

should also be used on all units with accessory low ambient

temperature control.

Mounting on Ground

1. Mount unit on a solid level concrete pad.

2. If a heat pump is being installed, use a field-- provided snow

stand or ice rack where prolonged subfreezing temperatures

or heavy snow occurs.

3. Position unit so water or ice from roof does not fall directly

onto unit.

4. On cooling only units, an accessory stacking kit can be used

when units are to be stacked. See installation instructions

provided with the accessory kit.

Mounting on Roof

PERSONAL INJURY AND/OR EQUIPMENT

DAMAGE HAZARD

Failure to follow this caution may result in personal injury

and / or equipment damage.

Be sure unit panels are securely in place prior to rigging.

CAUTION

1. Rig the unit. Keep the unit upright and lift using a sling.

Use cardboard or padding under the sling, and spreader bars

to prevent sling damage to the unit. See Fig 16. See Fig. 2

for center of gravity reference

2. Mount unit on a solid concrete pad or platform.

3. Isolate unit and piping from structure

4. If a heat pump is being installed, use a field-- provided snow

stand or ice rack where prolonged subfreezing temperatures

or heavy snow occurs.

5. On cooling only units, an accessory stacking kit can be used

when units are to be stacked. See installation instructions

provided with accessory kit.

A07396

Fig. 16 -- Lifting Unit with Sling

Mounting Unit on Wall

The units can also be mounted on the wall using the accessory

mounting kit.

Complete Outdoor Refrigerant Piping Connec-

tions

Follow the following general guidelines:

1. Use refrigerant grade field – supplied tubing.

Refer to Table 4 for the correct line sizes.

2. Do not use less than 10 ft (93.05 m) of interconnecting

tubing.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

If any section of pipe is buried, there must be a 6 in. (152.4

mm) vertical rise to the valve connections on the outdoor

unit. If more than the recommended length is buried,

refrigerant may migrate to cooler, buried section during

extended periods of system shutdown. This causes

refrigerant slugging and could possibly damage the

compressor at start--up.

When more than 80 ft (24.4 m) of interconnecting tubing is used,

consult the Duct--Free Split System Long Line Application Guide

for required accessories.

3. Insulate both lines. A minimum of 1/2 inch foam pipe insu-

lation is recommended.

4. Run the refrigerant tubes as directly as possible and avoid

unnecessary turns and bends.

5. Suspend refrigerant tubes to avoid damage to insulation or

tubes so they do not transmit vibration to the structure.

6. When passing refrigerant tubes through the wall, seal the

opening so rain and insects do not enter the structure. Leave

some slack in refrigerant tubes between structure and out-

door unit to absorb vibration.

NOTE: A fusible plug is located in unit suction line; do not cap

this plug. If local codes require additional safety devices, install as

directed.

Connection at Outdoor Unit

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

To prevent damage to unit or service valves observe the

following:

SA brazing shield MUST be used.

SWrap service valves with wet cloth or use a heat sink

material.

38HDF Units:

1. Assemble the connector tube to the factory supplied filter

drier by:

a. Braze the field supplied connector to the inlet of the

filter drier (see Fig. 17)

b. Braze the factory supplied flare connector to the outlet

end of the filter drier (see Fig.17)

A09499

Fig. 17 -- 38HDF018--036 Connector Tube Assembly

2. Assemble the Accurator body (see Fig. 18) using the correct

factory supplied piston (refer to Table 7) .

NOTE: Arrow on AccuRater body points in free flow direction, away from the

indoor coil.

A09501

Fig. 18 -- AccuRater (bypass type) Metering Device

Components

3. Attach the complete Accurator assembly to the flare connec-

tion end of the filter drier

4. Braze the completed filter drier/Accurator assembly to the

liquid service valve.

5. Connect the field supplied line set to the filter drier/Accura-

tor assembly and the suction valve. A sweat connection is

required at the suction valve and flare connection is required

for the mixed phase line.

6. Insulate any exposed areas between the line set and the li-

quid valve.

38QRF Units

1. Assemble the connector tubes to the factory supplied filter

drier by brazing the factory supplied flare connectors to the

inlet and outlet for the filter drier (see Fig. 19)

A09507

Fig. 19 -- 38QRF018--036 Connector Tube Assembly

2. Perform step 2 and 3 from the 38HDF section.

3. Remove the plastic cap from the liquid and suction service

valve on the 38QRF unit and assemble the heating piston

and piston cap supplied with the outdoor unit as shown in

Fig. 20.

A07407

Fig. 20 -- AccuRater (bypass type)

Metering Device Components

NOTE: The Teflon seal on the piston should point towards the

liquid service valve. The size of the factory supplied piston might

have to be adjusted for long line applications (over 80 ft / 24.4 m).

Refer to the Duct Free Long Line Application Guide for additional

information.

4. Attach the flare end of the filter drier assembly to the piston

cap (see Fig. 20).

5. Connect the field supplied line set to the filter drier as-

semblyandtothesuctionvalve.

6. Insulate any exposed areas between filter drier and liquid

valve.

Complete Outdoor Power and Control Wiring

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

The unit cabinet must have an uninterrupted or unbroken

ground to minimize personal injury if an electrical fault should

occur. The ground may consist of electrical wire or metal

conduit when installed in accordance with existing electrical

codes.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Unit failure as a result of operation on improper line voltage or

excessive phase imbalance constitutes abuse and may cause

damage to electrical components. Such operation could void

any applicable Carrier warranty.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

Before performing service or maintenance, be sure indoor unit

main power switch is turned OFF and indoor blower has

stopped.

Lock out and tag switch with a suitable warning label.

Power Wiring

1. Mount outdoor power disconnect. The unit is factory wired

for the voltage shown on the unit nameplate. The fused dis-

connect switch must be provided within sight of the unit,

readily accessible, but out of reach of children. Provisions

for locking the disconnect switch on the OFF (open) posi-

tion is advisable. The disconnect switch must comply with

NEC and local codes. Protect the unit and wiring using only

the recommended fuse/circuit breaker size. See Table 10..

2. Run power wiring from main box to disconnect per NEC

and local codes.

3. Run power wiring from the disconnect switch to outdoor

unit. Use only minimum 60_C copper conductors between

the disconnect switch and the unit for field power connec-

tion.

4. Route the field power wires through the conduit connection

opening in the unit side panel and connect in junction box

as shown in Fig 21. The unit and power wiring must be

grounded.

BLK

SINGLE-PHASE UNIT

GROUNDING LUG

SINGLE-PHASE

CONN TO

DISCONNECT

PER NEC

BLK

BLU

YEL

GROUNDING LUG

THREE-PHASE

CONN TO

DISCONNECT

PER NEC

THREE-PHASE UNIT

GROUND LEAD

LEGEND

NEC -- National Electrical Code

-- Splice (field)

Field Wiring

Factory Wiring

A08251

Fig. 21 -- Line Power Connections

NOTE: Operating unit on improper line voltage constitutes abuse

and could affect Carrier warranty. Do not install unit in a system

where voltage may fluctuate above or below permissible limits.

Control Wiring

The control circuit is 24 volts AC (minimum 40VA) supplied from

the indoor unit.

1. Make sure you have enough control wires to cover the dis-

tance between the indoor and outdoor unit.

2. Route one end of the control wiring through the opening

provided in the unit side panel and connect to the control

terminal strip using either Fig. 21 for 38HDF units and Fig.

22 for 38QRF units.

Outdoor

Terminal

Board

Indoor

Board

Indoor

Terminal

Board

Outdoor

Terminal

Board

Indoor

Board

Indoor

Terminal

Board

A09508

Fig. 22 -- 38HDF Control Terminal Strip

Outdoor

Terminal

Board

Indoor

Board

Indoor

Terminal

Board

Outdoor

Terminal

Board

Indoor

Board

Indoor

Terminal

Board

A09509

Fig. 23 -- 38QRF Control Terminal Strip

NOTE: Use No. 18 AWG color--coded, insulated (35_C minimum) wire. If the distance between the indoor and outdoor unit is greater than

100 ft. (30.5 m), as measured along the control voltage wires, use No. 16 AWG color--coded wire to avoid excessive voltage drop.

Table 10 – 38HDF / 38QRF Electrical Data

38HDF /

38QRF

UNIT

SIZE

V --- P H --- H z

VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR MIN CKT

AMPS

FUSE/

HACR

BKR

AMPS

RLA LRA FLA NEC Hp kW Out

Min Max

018 208/230---1---60 187 253 9.0 48.0 0.80 0.125 0.09 12.1 20

024 208/230---1---60 187 253 12.8 58.3 0.80 0.125 0.09 16.8 25

030 208/230---1---60 187 253 14.1 73.0 1.50 0.25 0.19 18.4 30

035

208/230---1---60 187 253 16.7 79.0 1.50 0.25 0.19 22.3 35

208/230---3---60 187 253 10.4 79.0 1.50 0.25 0.19 14.5 20

4 6 0 --- 3 --- 6 0 414 506 5.8 79.0 0.80 0.25 0.19 8.7 15

036

208/230---1---60 187 253 17.9 112.0 1.45 0.25 0.19 23.8 40

208/230---3---60 187 253 13.2 88.0 1.45 0.25 0.19 18.0 30

4 6 0 --- 3 --- 6 0 414 506 6.0 44.0 0.80 0.25 0.19 8.3 15

Table 11 – 40QNC, QNQ Fan Coil Electrical Data

UNIT SIZE V --- P H --- H z

VOLTAGE RANGE* FAN POWER

Min Max FLA Motor Power

(Watts)

MIN CKT

AMPS

FUSE/CKT

BKR AMPS

40QNC01824 208/230---1---60 187 253 0.38 64 0.48 15

40QNC030 208/230---1---60 187 253 0.38 74 0.48 15

40QNC036 208/230---1---60 187 253 0.44 74 0.55 15

40QNQ018 208/230---1---60 187 253 0.38 64 0.48 15

40QNQ024 208/230---1---60 187 253 0.38 64 0.48 15

40QNQ030 208/230---1---60 187 253 0.38 74 0.48 15

40QNQ036 208/230---1---60 187 253 0.44 74 0.55 15

LEGEND:

FLA --- F u l l L o a d A m p s

LRA --- L o c k e d R o t o r A m p s

NEC --- National Electrical Code

RLA ---RatedLoadAmps(compressor)

* Permissible limits of the voltage range at which the unit will operate

satisfactorily

NOTES:

1. Control circuit is 24---V on all units and requires external power

source. Copper wire must be used from service disconnect to unit.

2. All motors/compressors contain internal overload protection.

3. In compliance with NEC (USA Standard) requirements for multimo-

tor and combination load equipment (refer to NEC Articles 430 and

440), the over current protective device for the unit shall be fuse.

4. Motor RLA values are established in accordance with UL (Under-

writers’ Laboratories) Standard 465 (USA Standard).

5. 38QRF018---030 units are only available in single---phase voltage.

6. Unbalanced 3---Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is

greater than 2%. Use the following formula to determine the percent-

age of voltage imbalance:

= 100 X max voltage deviation from average voltage

average

EXAMPLE: S u p p l y v o l t a g e i s 4 6 0 --- 3 --- 6 0

AB = 452v

BC = 464v

AC = 455v

Average Voltage = 452 + 464 + 455

=1371

=457

Determine maximum deviation from average voltage:

(AB) 457---452 = 5v

(BC) 464 ---457 = 7v

(AC) 457---455 = 2v

Maximum deviation is 7v.

Determinepercentageofvoltageimbalance

% of voltage imbalance = 100 x 7

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum

allowable of 2%.

IMPORTANT: Contact your local electric utility company immediately if the

supply voltage phase imbalance is more than 2%.

A08367

Fig. 24 -- 40QNC01824 Matched with 38HDF Typical Wiring Schematic

Optional on 38QRF018/024 Models

A08368

Fig. 25 -- 40QNQ018,024 Matched with 38QRF Typical Wiring Schematic

A08369

Fig. 26 -- 40QNC030, 036 Matched with 38HDF Typical Wiring Schematic

Optional on 38QRF0036 Models

Standard on 38QRF030

A08370

Fig. 27 -- 40QNQ030, 036 Matched with 38QRF Typical Wiring Schematic

Run Power Wiring for Indoor Unit

Be sure field wiring complies with local building codes and NEC,

and unit voltage is within limits shown in Table 11.

Contact local power company for correction of improper line

voltage.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position.

There may be more than 1 disconnect switch. Lock out and

tag switch with a suitable warning label.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Unit failure as a result of operation on improper line voltage or

excessive phase imbalance constitutes abuse and may cause

damage to electrical components. Such operation could void

any applicable Carrier warranty.

NOTE: Use copper wire only between disconnect switch(es) and

unit.

NOTE: Install branch circuit disconnect of adequate size to handle

unit starting current per NEC. Locate disconnect within sight of,

and readily accessible from, unit, per section 440--14 of NEC.

Some codes allow indoor unit to share disconnect with outdoor

unit if disconnect can be locked; check local code before installing

in this manner.

The 40QNC/QNQ units require their own power supply.

1. Locate the indoor power supply.

2. Locate and install disconnect switch per NEC and local

codes.

3. Run power supply wiring to disconnect switch.

4. Run power wiring from disconnect switch to wall mount

area.

5. If any accessories are being installed, refer to the individual

accessory instructions for guidance on wire routing at this

time.

Install All Power, Interconnecting Wiring, Piping and

Drain Hose to Indoor Unit .

1. Run control wiring from the outdoor unit through the access

hole in the wall and make sure you have enough wire to

reach the control box of the unit once hung on the mounting

plate.

2. It is a recommended that flare connections is located on the

outside of the wall where the indoor unit is to be mounted.

If an extension pipe is required to facilitate this location,

measure, fabricate and install the extension pipes to the in-

door unit before hanging the unit on the mounting bracket.

3. If piping connections are on the outside wall, pass the pipes

(refrigerant and drain) through the wall sleeve and then

hook the indoor unit body on top of the wall hanging brack-

et. Support the unit away from the bottom using a tool or a

piece of wood.

NOTE: Tie together the refrigerant piping, the drain hose, and the

electrical connection wires and ensure that the drain hose is at the

bottom as shown in Fig. 28.

A08364

Fig. 28 -- Location of Piping, Hose, and Wiring

4. If required make the flare connections.

5. Route the power and control wiring through the back side

of the unit and to the control box area. If the wired remote

or zone manger accessory are to be used, perform any modi-

fications required at this time. Refer to the Accessory install-

ation instructions).

6. Remove the control box cover and finish all indoor unit

wiring connections as shown on the wiring diagram or in

the accessory installation instructions. Replace the control

box cover.

7. Fix the bottom part of the unit to the wall mounting bracket

and push it carefully until the two bracket hooks fit into the

marked places at the base of the unit until it snaps into

place. See Fig. 29.

Wall

Hanging

Bracket Hook Hole

Retainer

C lip

Retainer

Clip

UNIT SIZE DIMENSION

40QNC01824 13.4 10.6

40QNC030 12.2 12.2

40QNC036 12.2 12.2

40QNQ018 13.4 10.6

40QNQ024 13.4 10.6

40QNQ030 12.2 12.2

40QNQ036 12.2 12.2

A08365

Fig. 29 -- Wall Mounting Details

8. If the refrigerant piping connections are located outside the

wall, tighten the flare connections as shown in Fig. 30. Insu-

late all exposed refrigerant lines and secure to the wall and

fill any void spaces in the hole.

Adjustable wrench or torque wrench

Outdoor end

Indoor end

A07201

Fig. 30 -- Tightening Connections

USER INTERFACE

The indoor unit includes a wireless remote control to operate the

unit (an Owner’s Manual is supplied with the unit). If you have

two units installed in the same space and they need to work

independently, the remote controls and the units need to be

configured as follow:

Unit Configuration

Turn the unit off by pressing the . Press and hold the and

buttons of the remote control for more than 5 seconds. The

display will be cleared and the time segments will display the first

configuration item (rAdr=remote address) and the temperature

segments will display the default value of this configuration item

(Ab=control of both indoor units). Press and to change the

default value to the new value of (a) or (b). Press the button to

transmit the new configuration to the unit. Press the button to

leave the configuration menu.

Remote Control Configuration

Turn the unit off by pressing the button. Press and hold the

and buttons for more than 5 seconds. The display will be

cleared and the time segments will display the first configuration

item (CH=remote address) and the temperature segments will

display the default value of this configuration item (Ab=control of

both indoor units).

Press and to change the default value to the new value of (a)

or (b). Press the button to transmit the new configuration to the

unit. Press the button to leave the configuration menu.

NOTE: When 30 seconds have elapsed and no buttons have been

pressed, the remote control will automatically exit the

configuration menu and resume its normal operation.

A wall mounted control or zone manager can be used to control a

unit or multiple units.

Wired Control

If a wall mounted wired control is required the following steps

should be performed at the same time the indoor control and power

wiring are being connected:

1. Unplug the connector on J5.

2. Remove the wire harness from the wired control box

3. Plug one end of the wire harness into the J5 connector on

the board

4. Route the other end of the wire harness to the back of the

unit along the low voltage wiring

5. Connect the other end of the wire harness to the field sup-

plied wiring between the indoor unit and the wired control

as shown in wired control installation instructions and Fig.

31.

A09512

Fig. 31 -- Control Wiring Between Indoor and Outdoor Units

Up to six units can be daisy--chained and controlled from one wired control.

* 100 ohm Resistor

A09513

Fig. 32 -- Multiple Unit Control Wiring

Zone Manager

If a Zone Manager is required, the following steps should be

performed at the same time the indoor control and power wiring

are being connected:

1. Plug the communication board to the J8 as shown in Fig. 33

2. Connect one end of the wire harness supplied with the Zone

Manager to the communication board.

3. Route the other end of the wire harness along the voltage

control to the back of the unit.

4. Connect the other end of the wire harness to the field sup-

plied wiring that will be connected to the zone manager as

shown in Fig. 33. (Shielded cables are required. Refer to

Zone Manager Installation Instructions for further informa-

tion.)

A09514

Fig. 33 -- Wiring for Zone Manager

START--UP

Preliminary Checks

1. Check condensate drainage system; on the opposite side of

the drain connection, insert a water bottle up into the fan

coil unit and fill the drain pan. Water must flow steadily; if

not, check the pipe slope or inspect for any pipe restrictions.

2. Make sure all wiring connections are correct and they are

tight.

3. Field electrical power source must agree with unit name

plate rating.

4. Check that all barriers, covers, and panels are in place. En-

sure that the filters and return--air grilles on the indoor unit

have been installed and that the discharge louvers are posi-

tioned correctly.

5. All service valves must be closed.

6. On units with crankcase heaters, ensure belly--band heaters

are tight around the compressor.

Evacuate and Dehydrate the System

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Never use the system compressor as a vacuum pump.

Using Vacuum Pump

1. Completely tighten flare nuts A, B, C, D, connect manifold

gage charge hose to a charge port of the low side service

valve. (See Fig. 34.)

2. Connect charge hose to vacuum pump.

3. Fully open the low side of manifold gage. (See Fig. 35)

4. Start vacuum pump

5. Evacuate using either deep vacuum or triple evacuation

method.

6. After evacuation is complete, fully close the low side of

manifold gage and stop operation of vacuum pump.

7. The factory charge contained in the outdoor unit is good for

up to 25 ft. (8 m) of line length. For refrigerant lines longer

than 25 ft (8 m), add 0.3 oz. per foot of extra piping up to

the maximum allowable length.

8. Disconnect charge hose from charge connection of the low

side service valve.

9. Fully open service valves B and A.

10. Securely tighten caps of service valves.

Outdoor Unit Indoor Uni

Refrigerant

Service Valve

Low Side

High Side

A07360

Fig. 34 -- Service Valve

Manifold Gage

500 microns

Low side valve

High side valve

Charge hose

Vacuum pump

Low side valve

A07361

Fig. 35 -- Manifold

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of

pulling a vacuum of 500 microns and a vacuum gage capable of

accurately measuring this vacuum depth. The deep vacuum method

is the most positive way of assuring a system is free of air and

liquid water. (See Fig. 36)

500

MINUTES

01234567

1000

1500

LEAK IN

SYSTEM

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

2000

MICRONS

2500

3000

3500

4000

4500

5000

A95424

Fig. 36 -- Deep Vacuum Graph

Triple Evacuation Method

The triple evacuation method should only be used when vacuum

pump is only capable of pumping down to 28 in. of mercury

vacuum and system does not contain any liquid water.

Refer to Fig. 37 and proceed as follows:

1. Pump system down to 28 in. of mercury and allow pump to

continue operating for an additional 15 minutes.

2. Close service valves and shut off vacuum pump.

3. Connect a nitrogen cylinder and regulator to system and

open until system pressure is 2 psig.

4. Close service valve and allow system to stand for 1 hr. Dur-

ing this time, dry nitrogen will be able to diffuse throughout

the system absorbing moisture.

5. Repeat this procedure as indicated in Fig. 37. System will

then be free of any contaminants and water vapor.

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

RELEASE CHARGE INTO SYSTEM

BREAK VACUUM WITH DRY NITROGEN

EVACUATE

WAIT

A95425

Fig. 37 -- Triple Evacuation Method

To Start the Unit:

1. If the outdoor unit is equipped with a crankcase heater, turn

on the indoor and outdoor disconnect switches to supply

power the system 12 hours before starting the system.

2. Release charge into the system by opening (back--seating)

liquid and suction line service valves.

3. Set the wireless remote control or wired remote control be-

low ambient temperature. Operate the unit for 15 minutes.

4. Refer to Table 6 to determine if additional charge is re-

quired. Also, if you have a long line application, refer to the

Duct Free Long Line Application Guide to determine the

additional charge that is required beyond 25 ft (7.6 m).

5. Calculate the total additional charge required and weigh in.

6. Charge should be added as liquid (not gas) slowly and care-

fully to low side to avoid liquid slugging.

7. Start unit with operation test. In test mode the unit will run

in cooling and heating (on heat pumps) regardless if there is

demand or not.

Set Unit in Test Mode Using Wireless Control

Turn power on to the unit. Insert batteries in remote control. Press

the and the buttons on the remote control for 5 seconds.

The remote control will be cleared and the time segment will

display the Src1=service test mode. Press the button to

transmit the service test signal to the unit. After the test has

completed press the button to leave the test menu.

NOTE: When 30 seconds have elapsed and no buttons have been

pressed, the remote control will automatically exit the test menu

and resume its normal operation.

SetUnitinTestModeUsingWiredControl

There is a hidden service test mode that is initiated through a

combination of button presses when the remote is off. The

following combination must be pressed within a 6 second period:

“DOWN--FAN--UP--FAN--MODE”

Once in service test mode, the service test mode message will be

sent and “Sr” will be displayed in the temperature icons until the

“DOWN” button is pressed.

During Service Test mode, all the icons are off. the only button

that is active is the “DOWN” button.

To cancel Service Test mode, press the “DOWN” button to send a

normal message with “OFF” mode.

Service Test mode automatically times out after 30 minutes and the

remote will operate normally.

Test Mode Sequence of Operation

Once unit is in TEST MODE, all remote control messages are

ignored except for a message to turn the unit OFF. Buzzer will

beep twice.

When in TEST MODE, the unit will operate as follows:

1. The unit Status (Green) and Timer (Yellow) LEDs will

blink every 2 seconds

GREEN YELLOW

A09594

Fig. 38 -- LED Display

2. Indoor fan will operate according to user – selected speed. If

Autofanisselected,thefanwillruninHighspeed

3. Cooling only system

a. Unit will operate in cool mode with demand

b. Louver will operate according to user -- selected posi-

tion or in cool position if louvers are set to Auto

4. Heat pump system

a. Unit will run in cooling mode with demand for 3

minutes

b. Unit will run in heat pump mode with demand for 2

minutes or until indoor coil temperature is greater than

104_F(40_C). If coil temperature reaches 104_F

(40_C), the unit will run in cool mode until test mode is

exited.

c. Louver will operate according to user -- selected posi-

tion or in cool/heat position if louvers are set to Auto.

5. Following will cancel Test Mode:

a. Unit is turned off by controller

b. Power is cycled during Test Mode

c. 30 minutes elapsed

d. Fail Mode

SERVICE

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF

position. There may be more than 1 disconnect switch.

Lock out and tag switch with a suitable warning label.

Pump--down Procedure

The system may be pumped down in order to make repairs on the

low side without losing complete refrigerant charge.

1. Attach pressure gage to suction service valve gage port.

2. Front--seat the mixed phase line valve.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

The unit coils hold only the factory--designated amount of

refrigerant. Additional refrigerant may cause units to relieve

pressure through the compressor internal pressure relief valve

(indicated by a sudden rise of suction pressure) before suction

pressure reaches 20 psig. If this occurs, shut off unit

immediately then front--seat the suction valve and remove and

recover excess refrigerant following accepted practices.

3. Start unit and run until suction pressure reaches 5 psig.

4. Shut unit off and front--seat suction valve.

5. Depressurize low side of unit and recover refrigerant fol-

lowing accepted practices.

Filter Drier

Whenever the filter drier is exposed to the atmosphere it must be

replaced. Only use factory specified liquid--line filter driers with

rated working pressures less than 600 psig.

NOTE: Do not install a suction--line filter drier in the mixed phase

line.

Refrigerant Charging

!WARNING

PERSONAL INJURY AND/OR EQUIPMENT

DAMAGE HAZARD

Failure to follow this warning could result in personal

injury and/or equipment damage.

Wear safety glasses and gloves when handling

refrigerant. Do not overcharge system -- this can cause

compressor flooding.

All units are shipped with the refrigerant charge listed on

nameplate.

NOTE: Do not vent or depressurize unit refrigerant to

atmosphere. Remove and recover refrigerant following accepted

practices.

TROUBLESHOOTING

See Table 12 and Table 13 for troubleshooting information.

Fault Code

Once a failure occurs with the indoor unit in operation, the green LED on the indoor unit flashes at intervals of 0.5 seconds. The fault code is

deduced from the number of times the green LED flashes, blocking unit operation. Between one flash cycle and the next one, a pause of 3

seconds elapses.

Table 12 – Green LED (Indoor Unit Fault)

CODE DESCRIPTION

3RoomAirSensorFault

4Indoor Unit Coil Sensor Fault

14 OutdoorUnitAirSensorFault

Table 13 – Troubleshooting

PROBLEM POSSIBLE CAUSE SOLUTION

Compressor and Fan of the Outdoor

Unit Will Not Start

Unit not energized Check the main power connection.

Main switch is set to OFF CheckandputittoONposition.

Main switch fuses are blown Replace fuses.

Compressor cycling protection is on Wait for 3 minutes.

Main power voltage is too low Check and set to the correct voltage.

Electrical connections are too loose or are wrong Check and tighten or correct connections.

Compressor Will Not Start, But Out-

door Fan is Operating

Electrical connections of compressor are loose or

wrong Check and tighten or repair compressor.

Compressor Stops Due to Over --- tem-

perature

Compressor burnt out; seized or protection device

Check for the cause and replace compressor if neces-

sary.

Wrong refrigerant charge in unit (excessive or low)

or air or other non---condensable gasses in the

circuit

Drain refrigerant, evacuate and recharge. CAUTION: Do

not vent refrigerant to the atmosphere; use refrigerant

recovery equipment.

Main voltage is too high or too low Check voltage setting and adjust if necessary.

Condenser coil obstructed Remove obstruction.

Outdoor fan off Check cause and resume operation or repair.

Wrong indoor unit thermistors Replace thermistors.

Refrigerant circuit clogged Check and remove obstructions.

Reversing valve faulty on heat pump models Replace reversing valve.

Expansion device clogged or covered with ice

Drain refrigerant, evacuate and recharge. CAUTION: Do

not vent refrigerant to the atmosphere; use refrigerant

recovery equipment.

Compressor Runs Continuously

Unit selected is too small for application require-

ments

Contact a qualified service technician for a system evalu-

ation.

Indoor temperature setting too low or too high Check temperature setting.

Outdoor unit fan faulty Replace outdoor fan.

Air or other non---condensable gasses in the cir-

cuit

Drain refrigerant, evacuate and recharge. CAUTION: Do

not vent refrigerant to the atmosphere; use refrigerant

recovery equipment.

Obstructions at air intake or dirty indoor unit filters Remove obstruction and/or clean filter.

F r e q u e n t I c e --- B u i l d --- U p o n O u t d o o r

Coil Outdoor fan is stopped Check cause and repair.

Discharge Pressure Too High

Outdoor coil dirty or obstructed Clean or remove obstructions.

Condenser fan faulty Replace condenser fan.

Indoor temperature setting too low or too high Check temperature setting.

Air or other non---condensable gasses in the cir-

cuit

Drain refrigerant, evacuate and recharge. CAUTION: Do

not vent refrigerant to the atmosphere; use refrigerant

recovery equipment.

Discharge Pressure Too Low

Indoor temperature setting too high or too low Check temperature setting.

Outdoor coil dirty or obstructed Clean or remove obstructions.

Indoor unit air filter dirty Clean filter.

Suction Pressure Too High Indoor temperature setting too high or too low Check temperature setting.

Reversing valve faulty or internal leak Replace reversing valve.

Suction Pressure Too Low

Indoor temperature setting too high or too low Check temperature setting.

Evaporator coil covered with ice Air circulation on the evaporator not sufficient; check and

repair.

Expansion device or suction line clogged Check and repair.

Outdoor fan does not stop during defrost periods Check electrical parts.

Outdoor Fan Cycling Due to Over---

Te m p e r a t u r e P r o t e c t i o n

Electrical connection loose Check connections.

Fan motor burn out Replace.

Fan bearing seized Check and repair.

Expansion device clogged or covered with ice

Drain refrigerant, evacuate and replace.

CAUTION: Do not vent refrigerant to the atmosphere; use

refrigerant recovery equipment.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

C a t a l o g N o : 4 0 Q N C --- Q --- 9 S I

Replaces: 40QN--- 8SI

Carrier 40Qnc Users Manual Q 9SI

40QNC to the manual dc7342a5-a949-4805-ba10-f9c82f673d2f

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