Installation Instructions

NOTE: Read the entire instruction manual before starting the installation,

40GXM

TABLE OF CONTENTS

PARTS LIST .......................................

SAFETY CONSIDERATIONS .........................

SYSTEM REQUIREMENTS

DIMENSIONS

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

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

CLEARANCES

INSTALLATION

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

GUIDE .............................

INDOOR UNIT INSTALLATION .......................

OUTDOOR UNIT INSTALLATION

SYSTEM VACUUM AND CHARGE

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

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

START-UP ........................................

TROUBLESHOOTING ..........................

7 - 9

9

10

11 - 13

5

6

6

PAGE

2

3

3

4

38GXM

Part No.

1

2

3

4

5

PARTS LIST

Part Name

Mounting Plate

Mounting Screws

Remote Control

Remote Control Holder

Conversion Joint

Qty

1

5

1

1

Varies. See CJ Table

A09653

A09655a

I-

Lou_ver__-

Display Closeul6

Remote control ....

IN

Remote control holder

Drain Hose--

Air intake

Connecting Pipe

Connecting Wires

Air outlet

Fig. 1 38GXC(M) / 40GXC(M) 018, 024 & 030 Parts List

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equipment

can be hazardous due to system pressures, electrical components,

and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics install, start-up, and service this equipment.

should

Untrained personnel can perform basic maintenance flmctions such as cleaning coils.

All other operations should be performed by trained service personnel.

When working literature equipment.

on the equipment, and on tags, stickers, observe precautions in the and labels attached to the

Follow all safety codes. Wear safety glasses and work gloves.

Keep quenching cloth and fire extinguisher nearby when brazing.

Use

care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings cautions included in literature and attached to the unit.

Consult or 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/}k

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

.

personal injury or death.

WARNING could result in personal injury or death.

signifies hazards

CAUTION which is used to identify unsafe practices which may result in nfinor personal injury or product and property damage.

NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

ELECTRICALSHOCK 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.

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Do not bury more than 36 in. (914 ram) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 ram) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may nfigrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start-up.

GENERAL

These instructions cover the installation, start-up and servicing of the 38GXM outdoor unit connected to up to four 40GXM indoor high wall units.

For approved combinations, please refer to the

Product Data.

SYSTEM REQUIREMENTS

Allow sufficient space for airflow and servicing unit.

See Fig. 2 and 3 for minimum required clearances.

IMPORTANT: separately.

Both refrigerant lines must be insulated

• Minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).

The following maximum lengths are allowed:

Unit Size

Total Piping

REFRIGERANT LINE LENGTHS R (m)

18 K 24 K

124 (38) 124 (38)

30 K

230 (70)

82 (25) 82 (25) 82 (25)

Max Elevation (ID over OD)

Max Elevation (OD over ID)

49 (15)

33 (10)

The following are the piping sizes.

UNIT SERVICE VALVESIZE*

Unit Size

18 & 30 K

24 K

Mix Phase

1/4"

1/4"

Vapor

3/8"

1/2"

Unit can have 2 or 4 service valves with the same pipe sizes

CONVERSION JOINTS

Model When Used

38GXM218---3

38GXM224---3

38GXM430---3

Qty. and

Type lx

(3/8 to 1/2)

2x

(1/2 to 3/8)

3 x

(3/8 to 1/2)

Connecting Size 12 K FCU

Connecting

Size 9 K FCU

Connecting Size 12 or 18 K FCU

Refrigerant Charge

Unit Size

18K

24 K

30 K

REFRIGERANTCHARGE

Charge Weight lb. (kg)

3.5

(1.6)

5.5 (2.5)

7.3

(3.3)

Above charge is for piping runs up to 50 ft. (15 m) per system for sizes 18 and 24 and 100 fl (30 m) per system for size 30.

• For piping runs greater than those listed above, add 0.23 oz for size 18, 0.17 oz for size 24, and 0.54 oz for size 30 of refrigerant per foot of extra piping up to the allowable length.

• Electronic expansion valves in the outdoor unit are used as metering devices.

Connecting (Power and Control Cable)

• The main power is supplied to the outdoor unit.

The field supplied connecting cable from the outdoor unit to indoor unit consists of four wires and provides the power for the indoor unit as well as the communication outdoor and indoor unit.

signal and ground between the

Two wires are high voltage AC power, one is high voltage controls and one is a ground wire.

• Consult local building codes, NEC (National Electrical Code) or

CEC (Canadian Electrical Code) for special requirements.

MIN. CKT AMP

UNIT SIZE POWER SOURCE MAX FUSE/CB

AMP

18k

24k

30k

208/230-1-60

208/230-1-60

208/230-1-60

14/20

20/30

24/40

Connecting Cable: Voltage drop on the connecting cable should be kept to a minimum.

Do not use thermostat wire,

Use minimum 14AWG 4 conductor cable (solid or stranded).

DIMENSIONS - INDOOR

i i i i i i i i i i i i i i i

Unit Size

9k

12k

18k

W

In. (mm)

30.3 (770)

32.7 (831)

40.2 (1021) w

H

In. (mm)

9.8 (249)

11.2 (284)

12.2 (310)

D

In. (mm)

7.84 (199)

8.9 (226)

9.0 (229)

A08289

Net Operating Weight

Lbs. (Kg)

18.7 (8.5)

24.2 (11)

28.6 (13)

DIMENSIONS

-

OUTDOOR

uu

HH

_u

HHN

W

Unit Size

18k

24k

30k

W

In. (mm)

33.3 (846)

37.4 (950)

37.4 (950)

D

In. (mm)

11.8 (300)

16.5 (420)

16.5 (420)

H

In. (mm)

27.0 (685)

33.1 (840)

33.1 (840)

Net Operating Weight

Lbs. (Kg)

114.4 (52)

150.0 (68)

165.0 (75)

A08290

CLEARANCES - INDOOR

CEILING

/

J-6"(0.15m!._mi

n.

6' (i8m)

FLOOR

Fig. 2 - Indoor unit clearance

CLEARANCES - OUTDOOR

IA

-----------+__L+ c

Air-outle

A07891

Air-inlet

UNIT

A

B

C

D

E

12kin.(mm)

20 (508)

20 (508)

24 (610)

12 (305)

24 (610)

Fig. 3 - Outdoor Unit Clearance

A07894

INSTALLATION GUIDE

Up to four fan coil units can be connected to one outdoor unit.

Refer to the Product Data for approved combinations.

Ideal installation locations include:

Each Indoor Unit

• A location where there are no obstacles near inlet and outlet area.

• A location which can bear the weight of indoor unit.

• Do not install indoor units near a direct source of heat such as direct sunlight or a heating appliance.

• A location which provides appropriate clearances as outlined in

Fig. 2.

Outdoor Unit

• A location which is convenient to installation and not exposed to strong wind.

If unit is exposed to strong winds it is recommended that a wind bafi]e be used.

Contact your Carrier

Representative for drawings.

(See Fig. 10)

• A location which can bear the weight of outdoor unit and where the outdoor unit can be mounted in a level position.

• A location which provides appropriate clearances as outlined in

Fig. 3.

• Do not install the indoor or outdoor units in a location with special environmental conditions.

your Carrier Representative.

For those applications, contact

INDOOR UNIT INSTALLATION

INSTALL MOUNTING PLATE

For each fan coil:

1. Carefully remove the mounting plate, which is attached to the back of the indoor unit.

2. The mounting plate should be located horizontally and level on the wall.

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

.2" (5 mm) diameter holes and insert anchors for the appropriate mounting screws.

4. Attach the mounting plate to the wall.

A09655

Fig. 6 18k Mounting Plate Spacing

FOR EACH FAN COIL, DRILL HOLE IN WALL

FOR INTERCONNECTING PIPING, DRAIN AND

WIRING

Refrigerant Line Routing

The refrigerant lines may be routed in any of the four directions shown in Fig. 7 (a) and (b).

For maximum serviceability, line flare connections and the it is recommended drain connection the wall that the fan coil is mounted on.

to have refrigerant on the outside of

As viewed from front

Knockout 3

@ Righ_ _

_2j_ Right Rear Exit

(a) (b)

@ Left Exi t

"_@ Left Rear Exit

_

(c)

Fig. 7 - Refrigerant Line Routing ic_Ou_ _

A08281

If piping is going through the back:

1. Determine pipe hole position using the mounting plate as a template.

Drill pipe hole diameter per chart below.

The outside pipe hole is l/2-in.

(13 mm) min. lower than inside pipe hole, so it slants slightly downward (see Fig. 8).

If piping is going to exit from the left rear, it is recommended to field-fabricate piping extensions to get the flare connections to the outside of the wall.

1/2 in. (13 mm)

Min.

cp cp 95

A085862

Fig. 4 - 9k Mounting Plate Spacing

21 93 (557)

5

Note: Units in ( ) = mm

Fig. 5 12k Mounting Plate Spacing

A08291

INDOOR OUTDOOR

A07371

Unit Size

9k, 12k, and 18k

Fig. 8 Drill Holes

Hole Diameter

in. (ram)

3.75 (95)

If piping is going through the right or left side:

1. Use a small saw blade to carefully remove the corresponding plastic covering on side panel and drill the appropriate size hole where the pipe is going through the wall.

See Fig.

7(c).

2. Remove knockout 1 if you are running only the wiring.

Remove knockout 1 and 2 or knockout 1, 2 and 3 if you are running both piping and wiring through the side of the unit.

OUTDOOR UNIT INSTALLATION

1. Use a rigid base to support unit in a level position.

2. Locate outdoor unit and connect piping and wiring.

INSTALL ALL POWER AND INTERCONNECTING

WIRING TO OUTDOOR UNIT

Strong

....

wind

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Excessive torque installation conditions.

can break flare nut depending on

Piping Connections to Outdoor Unit

IMPORTANT: Use refrigeration grade tubing ONLY.

No

other type of tubing may be used. Use of other types of tubing will void manufacturer's warranty.

Make sure there is enough piping to cover the required length between the outdoor and indoor unit.

Piping Guide:

• Do not open service valves or remove protective caps from tubing ends until all the connections are made.

• Bend tubing with bending tools to avoid kinks and flat spots.

• Keep the tubing free of dirt, sand, moisture, and other contanfinants to avoid damaging the refrigerant system.

• Avoid sags in the suction line to prevent the formation of oil traps. Insulate each tube with nfininmm 3/8-in. (10 ram) wall thermal pipe insulation. Inserting the tubing into the insulation before making the connections will save time and improve installation quality.

1. The unit is equipped with nmltiple pairs of service valves.

Each pair is clearly marked (color and letter) to identify the indoor unit circuits.

In the outdoor unit wiring area, each indoor unit interconnecting terminal block is marked (letter) the same as the corresponding pair of service valves.

The indoor units must be piped and wired in matched sets (A to

A; B to B, etc)

2. It is not required to use all of the available fan coil connections if the application does not require them at the current time. The system can be expanded at any time.

3. Conversion joints are supplied with the outdoor unit. They are required for certain fan coil combinations.

Refer to chart on page 3 of this document for proper combination.

4. Cut tubing with tubing cutter.

5. Install correct size flare nut onto tubing and make flare connection.

6. Apply a small amount of refrigerant oil to the flare connection on the tubing.

7. Properly align tubing in with service valve (conversion joint).

8. Tighten flare nut and finish installation using two wrenches as shown in Fig. 9.

© x

Fig.

10 - High Wind Installation

A07350

Outdoor Unit Wiring Connections

1. Mount outdoor power disconnect.

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

3. Remove field wiring cover (if available) loosening screws.

4. Remove knockouts..

from unit by

5. Connect conduit to conduit panel.

(See Fig. 11)

6. Properly connect both power supply and control lines to ternfinal block per the connection diagram.

7. Ground unit in accordance with NEC and local electrical codes.

8. Use lock nuts to secure conduit.

9. Reinstall field wiring cover (size 18k only).

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

• Be sure to comply with local codes while running wire from indoor unit to outdoor unit.

• Every wire nmst be connected firmly.

Loose wiring may cause ternfinal to overheat or result in unit malfunction.

A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

• No wire should be allowed to touch refrigerant tubing, compressor or any moving parts.

• Disconnecting means nmst be provided and shall be located within sight and readily accessible from the air conditioner.

• Connecting cable with conduit shall be routed through hole in the conduit panel.

Fig. 9 - Tighten Flare Nut

A07354

Covered

Outdoor

Terminal conduit unit

Block connection for size 18k only

Conduit panel

38GXM-40GXM018, 024 & 030 Connection Diaclram i

This Se ries of Connections Will be Re peated for Each Indoor Unit {A to A - B to B etc. !

I CABLE I

L1 I

Main

Power

Supply

208/230-1-60

L2 GND

Ground 1

_IE

I Outdoor Unit Terminal Blocks I

I Indoor Unit Power

Block

Signal I

I One Terminal Block

I

I Power and Control Signal to

Two or Four Term na B ocks

A09656a

Fig. 11 - Field Wiring

INSTALL

WIRING,

ALL POWER,

AND PIPING

INTERCONNECTING

TO INDOOR UNIT.

1.

Run interconnecting piping and wiring from outdoor unit to each indoor unit (in matched pairs).

2.

Pass interconnecting cable through hole in wall (outside to inside).

3.

Lift indoor unit into position and route piping and drain through hole in wall (inside to outside).

Fit interconnecting wiring into back side of indoor unit,

4.

Hang indoor unit on upper hooks of wall mounting plate (as shown in Fig. 12)

A08283

Fig.

12 - Hanging Indoor Unit

5. Open front cover of indoor unit and remove field wiring terminal block cover (see Fig. 13)

Field Wiring

Cover

Interconnecting

Cable

A08279

Fig.

13 - Field Wiring Cover

6. Pull interconnecting wire up from back of indoor unit and position in close to the terminal block on indoor unit.

7. Push bottom of indoor unit onto mounting plate to complete wall mount.

8. Connect wiring from outdoor unit per connection diagram

(see Fig. 11).

NOTE: connection

Polarity of power on outdoor unit.

wires must match original

9. Replace field wiring cover and close front cover of indoor unit,

10. Connect refrigerant piping and drain line outside of indoor unit.

Refer to Fig. 8 for proper installation of flare connections.

Complete pipe insulation pletely seal the hole in the wall.

at flare connection fasten piping and wiring to the wall as required, then

Com-

11. Repeat steps 1 through 10 for each indoor unit,

Failure

this caution may result in equipment damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns.

The alternate triple evacuation method may be used if the procedure outlined below is followed.

Always break a vacuum with dry nitrogen.

SYSTEM VACUUM AND CHARGE

Using Vacuum Pump

1. Completely tighten flare nuts A, B, C, D, (for all fan coils).

Connect gage charge hose to one circuit or all circuits (if using a nmltiple connection manifold) at the low side service valve charge port(s).

(See Fig. 14.)

2. Connect charge hose to vacuum pump.

3. Fully open the low side of manifold gage.

(See Fig. 15)

4. Start vacuum pump

5. Evacuate using either deep vacuum method.

or triple evacuation

6. After evacuation is complete, fully close the low side of manifold gage and stop operation of vacuum pump.

7. If nmltiple connection manifold is not used, repeat the procedure (1 through 6) until all indoor units and piping are completely vacuumed.

8. The factory charge contained in the outdoor unit is suitable for max pipe length as shown on page 3 of this document.

If additional charge is required, it should be added to the system as liquid at this time.

9. Disconnect charge hose from charge connection of the low side service valve.

10. Fully open all service valves.

11. Securely tighten caps of service valves.

Outdoor Unit Refrigerant Indoor Unit

[_ _T_&

_2:_ B

Service Valve

LowSide

High Side

D_

A07360

Fig.

14 Service Valve

Manifold Gage

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

)ositive way of assuring a system is free of air and liquid water.

See Fig.

16) o)

Z

O iv.

O m

=;

LEAK IN

SYSTEM

0 1 2 3 4

MINUTES

5 6

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

7

A95424

Fig. 16 - 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, 17 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. During this time, dry nitrogen will be aMe to diffuse throughout the system absorbing moisture.

5. Repeat this procedure as indicated in Fig. 17. System will then be free of any contaminants and water vapor.

IEVACUATE I l BREAK VACUUM WITH DRY NITROGEN I

500 microns

LOW side valve _'_ d/: _

))

Charge hose-_

__._7

\\_

"_

High side valve

Charge hose

[ i__

Low side valve

Fig. 15 - Manifold

A07361

I CHECK FOR TIGHT, DRY SYSTEM I

I RELEASE CHARGE INTO SYSTEM I

A95425

Fig. 17 Triple Evacuation Method

Final Tubing Check

IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment.

Ensure tubes are not rubbing against each other or any sheet metal.

Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight.

START-UP

Test Operation

Perform test operation safety check.

after completing gas leak and electrical

1, Push the "ON/OFF" testing.

button on Remote Control

NOTE: A protection feature prevents the air conditioner being activated for approximately 3 nfinutes.

to begin from

2, Push MODE button, select COOLING, HEATING, mode to check if all functions work correctly,

SYSTEM CHECKS

FAN

1. Conceal the tubing where possible.

2. Make sure that the drain tube slopes downward along its entire length.

3. Ensure all tubing and connections are properly insulated.

4. Fasten tubes to the outside wall, when possible.

5. Seal the hole through which the cables and tubing pass.

INDOOR UNIT

1. Do all Remote Control buttons flmction properly?

2. Do the display panel lights work properly?

3. Does the air deflection louver function properly?

4. Does the drain work?

OUTDOOR UNIT

1. Are there unusual noises or vibrations during operation?

Explain Following

Owner's Manual:

Items To Customer With The Aid Of The

1, How to turn air conditioner

COOLING, HEATING and other on and operating off; modes; selecting setting a desired temperature; setting the timer to automatically start and stop air conditioner operation; and all other features of the Remote Control and display panel.

2. How to remove and clean the air filter.

3, How to set air deflection louver.

4, Explain care and maintenance.

5, Present the Owner's Manual and installation instructions to customer.

10

TROUBLESHOOTING

This unit has onboard diagnostics.

below lists the error codes.

Error codes are displayed on the outdoor unit microprocessor board with colored LED lights.

The table

Equipment Fault

High Compressor Discharge Pressure Protection

High Leaving Outdoor Coil Air Temperature

Protection

Communication Error

IPM Module Protection

Compressor Over Current Protection

High Outdoor Coil Temperature Protection

Indoor Coil High Temperature Protection

Indoor Coil Freeze Protection

Failed Sensor

Compressor Overload Protection

Low Compressor Discharge Pressure Protection

Compressor Motor Phase Imbalance Protection

(Compressor Stops)

EEPROM Error

Power Factor Correction Board Capacitor Charge

Failure

Communication Error With Unit A

Unit A Mid Indoor Coil Temperature Thermistor

Unit A Leaving Indoor Coil Temperature Thermistor

Unit A Entering Indoor Coil Temperature Thermistor

Unit A Indoor Air Temperature Thermistor

Unit A Heating/Cooling Mode Conflict with Unit B

Unit A Indoor Coil Freeze Protection

Unit A Indoor Coil High Temperature Protection

Communication Error With Unit B

Unit B Mid Indoor Coil Temperature Thermistor

Unit B Leaving Indoor Coil Temperature Thermistor

Unit B Entering Indoor Coil Temperature Thermistor

Unit B Indoor Air Temperature Thermistor

Unit B Heating/Cooling Mode Conflict with Unit B

Unit B Indoor Coil Freeze Protection

Unit B Indoor Coil High Temperature Protection

Defrost Mode

Oil Return Mode

Outdoor Air Temperature Thermistor

Outdoor Coil Temperature Thermistor

Leaving Outdoor Coil Air Temperature Thermistor

Driver Board Communications Error

Normal Communication Between Ind. and OD Units

Compressor Speed Sensor Failure

(Compressor Stops)

IPM Module Protection

Inverter Failure

PFC Module Protection

Lock-Out Mode

Start-Up Failure

Low Voltage Protection

High Voltage Protection

IPM Module High Temperature Protection

Failed Communication Between ID and OD Units

38GM018-024

(Red)

Diagnostic Codes

Number of Flashes On Outdoor Unit Board LED's

(Yellow) (Yellow) (Red) (Green) (Green)

LED1

(Red)

LED2

(Green) (Green)

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1

6

7

4

5

2

3

8

1

6

7

4

5

2

3

8

9

6

1

2

3

5

1

2

3

4

5

6

7

8

9

10

Light

11

Equipment Fault

Compressor Operating Normally

High Compressor Discharge Pressure

Protection

High leaving Outdoor Coil Air Temperature

Protection

Communication Error

IPM Module Protection

Compressor Overcurrent Protection

High Outdoor Coil Temperature Protection

Indoor Coil High Temperature Protection

Indoor Coil Freeze Protection

Failed Sensor

Compressor Overload Protection

Low Compressor Discharge Pressure

Protection

Compressor Motor Phase Imbalance

Protection (Compressor Stops)

EEProm Error

Power Factor Correction Board Capacitor

Charge Failure

Compressor Ramping Down Due to High

Leaving Outdoor Coil Air Temperature

Compressor Ramping Down Due to High

Outdoor Coil Temperature

Compressor Ramping Down Due to High

Current

Compressor Ramping Down Due to

Compressor Motor Phase Imbalance

Compressor Ramping Down Due to Unit A

High ID Coil Temperature

Compressor Ramping Down Due to Unit B

High ID Coil Temperature

Compressor Ramping Down Due to Unit C

High ID Coil Temperature

Compressor Ramping Down Due to Unit D

High ID Coil Temperature

Defrost Mode

Max Comp. Speed Reached Due to High

Leaving OD Coil Air Temperature

Max Comp. Speed Reached Due to High

OD Coil Temperature

Max Comp. Speed Reached Due to High

Current

Max Comp. Speed Reached Due to

Compressor Motor Phase Imbalance

Max Comp. Speed Reached Due To Unit A

High Indoor Coil Temperature

Max Comp. Speed Reached Due To Unit B

High Indoor Coil Temperature

Max Comp. Speed Reached Due To Unit C

High Indoor Coil Temperature

Max Comp. Speed Reached Due To Unit D

High Indoor Coil Temperature

Oil Return Mode

Outdoor Air Temperature Thermistor

Outdoor Coil Temperature Thermistor

Leaving Outdoor Coil Air temperature

Thermistor

Driver Board Communications Error

Communication Error With Unit A

Unit A Mid Indoor Coil Temperature

Thermistor

Unit A Leaving Indoor Coil Temperature

Thermistor

Unit A Entering Indoor Coil Temperature

Thermistor

Unit A Indoor Air Temperature Thermistor

Unit A Heating/Cooling

Other Indoor Units

Mode Conflict With

Unit A Indoor Coil Freeze Protection

Unit A Indoor Coil High Temperature

Protection

Communication Error With Unit B

Unit B Mid Indoor Coil Temperature

Thermistor

Unit B Leaving Indoor Coil Temperature

Thermistor

Unit B Entering Indoor Coil Temperature

Thermistor

3

4

5

1

2

6

7

8

9

(Red)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

38GXM030

(Yellow) (Green)

Diagnostic Codes

Number of Flashes On Outdoor Unit Board LED's

(Red) (Yellow) (Green) (Red) (Yellow) (Green)

1

2

3

4

5

6

7

8

9

1

2

3

4

1

2

3

4

5

6

7

8

3

4

1

2

12

LED1

(Red)

LED2

(Green)

Equipment Fault

Unit B Indoor Air Temperature Thermistor

Unit B Heating/Cooling

Other Indoor Units

Mode Conflict With

Unit B Indoor Coil Freeze Protection

Unit B Indoor Coil High Temperature

Protection

Communication Error With Unit C

Unit C Mid Indoor Coil Temperature

Thermistor

Unit C Leaving Indoor Coil Temperature

Thermistor

Unit C Entering Indoor Coil Temperature

Thermistor

Unit C Indoor Air Temperature Thermistor

Unit C Heating/Cooling Mode Conflict With

Other Indoor Units

Unit C Indoor Coil Freeze Protection

Unit C Indoor Coil High Temperature

Protection

Communication Error With Unit D

Unit D Mid Indoor Coil Temperature

Thermistor

Unit D Leaving Indoor Coil Temperature

Thermistor

Unit D Entering Indoor Coil Temperature

Thermistor

Unit D Indoor Air Temperature Thermistor

Unit D Heating/Cooling Mode Conflict With

Other Indoor Units

Unit D Indoor Coil Freeze Protection

Unit D Indoor Coil High Temperature

Protection

Correct Communication Data

Normal Compressor Operation

Compressor Speed Sensor Failure

(Compressor Stops)

IPM Module Protection

Inverter Failure

PFC Module Protection

Lock-Out Mode

Start-Up Failure

Low Voltage During Start-Up

High Voltage Protection

IPM Module High Temperature Protection

Low Voltage Protection

IPM Module Detects Short Or Open Circuit

Failed Communication Between ID and OD

Units

Normal Communication

(Red)

38GXM030

(Yellow)

Diagnostic Codes (Continued)

Number of Flashes On Outdoor Unit Board LED's

(Green) (Red) (Yellow) (Red) (Yellow) (Green)

5

6

7

8

1

2

3

4

5

6

7

8

3

4

5

6

7

8

1

2

(Green)

1

LED1

(Red)

LED2

(Green)

1

2

7

8

5

6

3

4

9

10

11

12

1

2

13

Copyright 2011 CAC / BDP ° 7310 W. Morris St. ° Indianapolis, IN 46231

Manufacturer reserves the right to change, at any time, specification8

Printed in U,S,A, Edition Date: 03/11 and design8 without notice and without obligations,

14

Catalog No: 38-40GXM-2SI

Replaces: 3840GXM1Sl