Carrier Air Conditioner Error Codes

Carrier Global Corporation founded in 1915, is an American multinational home appliance company that came forward as an independent manufacturer and distributor of air conditioning and heating ventilating systems. With a headquarter in Palm Beach Gardens, Florida – the company has made an impact worldwide. Offering commercial and residential appliances and equipment.

With customers in 106 countries Carrier is said to be one of the few corporations that serve six continents. Offering a wide range of appliances, including residential and commercial air conditioners. While the company has a great track record, there are times when buyers find themselves facing an error code. While some might call for help, we feel it’s best to try and deal with the situation on your own. As most errors come with a simple and easy fix you can take on your own.

The best way to deal with the situation is to note down the error code and match it using the list below. Once you have the error code you can easily work your way to the fix. To help you out we have listed down some of the most common error codes for Carrier Air conditioners. These can help you regain control over your appliance, and ensure a smooth and fully functional system.

Error Codes List:

The printed circuit boards existing inside the indoor unit are equipped with self-diagnostic function to detect malfunction and automatically stops the operation at the air conditioner after blinking of power or timer led as per malfunction.

Wall Mounted Air Conditioner Error Codes

Indoor Error Codes:

Error Codes	Meaning
E0	Indoor unit EEPROM parameter error
E1	Indoor / outdoor units communication error
E3	Indoor fan speed has been out of control
E4	Indoor room temperature sensor T1 open circuit or shortcircuit
E5	Evaporator  coil  temperature  sensor  T2  open  circuit  or short circuit
EC	Refrigerant Leakage Detection
F1	Outdoor  ambient  temperature  sensor  T4  open  circuit  or short circuit
F2	Condenser  coil  temperature  sensor  T3  open  circuit  or short circuit
F3	Compressor   discharge   temperature   sensor   T5   open circuit or short circuit
F4	Outdoor unit EEPROM parameter error
F5	Outdoor fan speed has been out of control
P0	IPM malfunction or IGBT over-strong current protection
P1	Over voltage or over low voltage protection
P2	High temperature protection of compressor top diagnosis and solution
P4	Inverter compressor drive error
P5	Mode conflict
P6	Compressor voltage protection

Outdoor Error Codes:

Error Codes	Meaning
E0	Outdoor EEPROM malfunction
E2	Indoor/outdoor units communication error
E3	Communication malfunction between IPM board and outdoor main board
E4	Open or short circuit of outdoor unit temperature sensor
E5	Voltage protection
E8	Outdoor fan speed malfunction
F1	No A Indoor unit coil outlet temperature sensor or connector of sensor is defective
F2	No B Indoor unit coil outlet temperature sensor or connector of sensor is defective
F3	No C Indoor unit coil outlet temperature sensor or connector of sensor is defective
F4	No D Indoor unit coil outlet temperature sensor or connector of sensor is defective
F5	No E Indoor unit coil outlet temperature sensor or connector of sensor is defective
P1	High pressure protection
P2	Low pressure protection
P3	Current protection of compressor
P4	Temperature protection of compressor
P5	High temperature protection of condenser
P6	IPM module protection

Outdoor Check Function

00: Normal display

01: Number of indoor units in good connection

02: Outdoor unit running mode

03: A indoor unit capacity HP

04: B indoor unit capacity HP

05: C indoor unit capacity HP

06: D indoor unit capacity HP

07: E indoor unit capacity HP

08: A Indoor unit capacity demand code

09: B Indoor unit capacity demand code

10: C Indoor unit capacity demand code

11: D Indoor unit capacity demand code

12: E Indoor unit capacity demand code

13: Total indoor units amendatory capacity demand code

14: Target frequency corresponding to the total indoor units amendatory capacity demand

15: Target frequency after the frequency limit

16: Target frequency sending to compressor control chip

17: A indoor unit evaporator outlet temp.

18: B indoor unit evaporator outlet temp.

19: C indoor unit evaporator outlet temp

20: D indoor unit evaporator outlet temp.

21: E indoor unit evaporator outlet temp.

22: A indoor unit room temp.

23: B indoor unit room temp.

24: C indoor unit room temp.

25: D indoor unit room temp.

26: E indoor unit room temp.

27: A indoor unit evaporator temp.

28: B indoor unit evaporator temp.

29: C indoor unit evaporator temp.

30: D indoor unit evaporator temp.

31: E indoor unit evaporator temp.

32: Condenser pipe temp.(T3)

33: Outdoorambient temp.(T4)

34: Compressor discharge temp.(Tp)

35: AD value 0f current

36: AD value of voltage

37: EEV open angle forA indoor unit

38: EEV open angle for B indoor unit

39: EEV open angle for C indoor unit

40: EEV open angle for D Indoor unit

41: EEV open angle for E indoor unit

42: Frequency limit symbol

43: Average value of T2

44: Outdoor fan speed

45: The last error or protection code

Judgment by Flashing LED of Indoor Unit

Notes:

1. The contents of items B and C and a part of item E are displayed when air conditioner operates
2. When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.
3. The check codes can be confirmed on the remote controller for servicing.

Caution at Servicing:

1. After servicing, push the [ Θ] button to return to the normal mode.
2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.

Error Code: 0C

Cause of operation: Short-circuit or disconnection of the room temperatur sensor (TA sensor).

Error Code: 0d

Cause of operation: Being out of place, disconnection, short-circuit, or migration of heat exchanger sensor (TC sensor)

Error Code: 11

Cause of operation: Lock of indoor fan or trouble on the indoor fan circuit

Error Code: 12

Cause of operation: Trouble on other indoor P.C. boards

Error Code: 04

Cause of operation: Return serial signal is not sent to indoor side from operation started. (1) Defective wiring of connecting cable (2) Operation of compressor thermo. Gas shortage Gas leak

Error Code: 05

Cause of operation: Operation command signal is not sent to outdoor side.

Error Code: 14

Cause of operation: Inverter over-current protective circuit operates. (Short time)

Error Code: 16

Cause of operation: Position-detect circuit error or short-circuit between windings of compressor

Error Code: 17

Cause of operation: Current-detect circuit error

Error Code: 18

Cause of operation: Being out of place, disconnection or short- circuit of outdoor temp. sensor

Error Code: 19

Cause of operation: Disconnection or short- circuit of discharge temp. sensor

Error Code: 1A

Cause of operation: Outdoor fan drive system error

Error Code: 1b

Cause of operation: Outdoor heat exchanger temp. sensor error

Error Code: 1C

Cause of operation: Compressor drive output error, Compressor error (lock, missing, etc.), Break down

Error Code: 07

Cause of operation: Return serial signal has been sent when operation started, but it is not sent from halfway.

Error Code: 1d

Cause of operation: Compressor does not rotate.

Error Code: 1E

Cause of operation: Discharge temp. exceeded 117°C

Error Code: 1F

Cause of operation: Break down of compressor

Error Code: 08

Cause of operation: Four-way valve inverse error

Carrier Aircon X-Power Inverter Error Codes;

Outdoor unit:

Code: 1 Heat exchanger sensor (TE) error

Code: 2 Suction sensor (TS) error

Code: 3 Hot gas discharge sensur (TD) ermr

Code: 4 High-pressure protemion error

Code: 5 Outdoor air temperature sensor error (TO)

Code: 6 Outdoor DC fan motor error

Code: 7 Communication error between IPDU (Abnormal stop)

Code: 8 High-pressure release operation

Code: 9 Discharge temp. error: hot gas is too high

Code: 10 EEPROM error

Code: 11 Communication error between IPDU (No abnormal stop)

Code: 12 G-Tr short-circuit protection

Code: 13 Detect circuit error

Code: 14 Current sensor error

Code: 15 Comp. lock error

Code: 16 Comp. break down

Indoor unit:

Code: 2 Condensate Pump Failure or water drain Failure

Code: 3 Indoor unit Room Air sensor fault

Code: 4 Indoor unit Tc Coil sensor fault

Code: 10 Indoor unit software fault (EEPROM Corrupt)

Code: 12 Indoor unit software fault (Address/Zone Corrupt)

Code: 14 Loss of Signal From CDU

Code: 15 Indoor unit Tcj Coil sensor fault

Code: 18 Outdoor unit control box fault (G-Tr short circuit protection)

Code: 20 Position Detection Circuit Error

Code: 21 Outdoor unit Current Sensor fault

Code: 22 Outdoor unit Heat Exchange Sensor fault

Code: 23 Outdoor unit Discharge Temperature Sensor fault

Code: 24 Outdoor unit Fan fault

Code: 26 Other Outdoor unit fault

Code: 27 Outdoor unit Compressor Lock

Code: 28 Outdoor unit Discharge Temperature fault

Code: 29 Outdoor unit Compressor Breakdown

Code: 31 Outdoor unit High TemperatureiPressure Release

Carrier Infinity Series AC Error Codes

The codes are flashed by a series of short and long flashes of the status light. The short flashes indicate the first digit in the status code, followed by long flashes indicating the second digit of the error code. The short flash is 0.25 seconds ON and the long flash is 1.0 second ON. Time between flashes is 0.25 seconds. Time between short flash and first long flash is 1.0 second. Time between code repeating is 2.5 seconds with LED OFF. Count the number of short and long flashes to determine the appropriate flash code. Table 6 gives possible causes and actions related to each error.

Carrier Window Room AC Error Codes

Operate the fan without cooling until the frost disappears.

E1: Loss of communication between the CCC 2 thermostat and an individual system power module board. The LED will display error code EI and the zone number that lost communication. Any additional zones that loose communication will blink in addition to the current zone.

E2: Open circuit or out-of-range indoor temperature sensor. All heat , cool, and dehumidify operations will be locked out. Manual fan operation will continue.

E3: Indoor Temperature Sensor. All heat, cool, and dehumidify operation will be locked out. Manual fan operation will continue.

E4: Open circuit or out of range Outdoor Temperature Sensor (select models). Heat pump and dehumidification operation will be locked out. Air conditioner, furnace, heat strip and fan operation can continue to operate.

E5: Open circuit or out of range Freeze Sensor. Air conditioner and dehumidification operation will be locked out. Heat pump, furnace, heat strip and fan operation can continue to operate but displays the last temperature set-point.

E6: Open circuit Humidity Sensor (Select Models). Air conditioner and dehumidification will be locked out. Heat pump, furnace heat strip and fan can continue to operate.

E7: Loss of 120 VAC power to all power module boards on the system. The system will shut down.

E8: Invalid zone configuration. The heat pump and heat strip DIP switches are both set to the ON position in one zone. Heat pump, heat strip, air conditioner, and dehumidify operation will be locked out in the affected zone.

E9: Invalid zone configuration. The dehumidifier DIP switch and either the heat pump or heat strip DIP switches are set to the ON position in one zone. Heat pump, heat strip, air conditioner, and dehumidify operation will be locked out in the affected zone.

Sometimes a breaker will look like it is in the operating position but is actually tripped. Be sure to flip the breaker lever to ‘OFF’ and then back to “ON’ with the corresponding click.

Carrier Air Conditioner Other Fault Codes

Fault Code	Solution
nF	Air Filter Replacement Reminder: After 2,880 hours of use, the display window on the indoor unit will flash “nF.” This is a reminder to replace your filter. After 15 seconds, the unit will revert to its previous display. To reset the reminder, press the LED button on your remote control 4 times, or press the MANUAL CONTROL button 3 times. If you don’t reset the reminder, the “nF” indicator will flash again when you restart the unit.
cl	Air Filter Cleaning Reminder: After 240 hours of use, the display window on the indoor unit will flash “CL.” This is a reminder to clean your filter. After 15 seconds, the unit will revert to its previous display. To reset the reminder, press the LED button on your remote control 4 times, or press the MANUAL CONTROL button 3 times. If you don’t reset the reminder, the “CL” indicator will flash again when you restart the unit.
ec	Refrigerant Leakage Detection: The indoor unit will automatically display “EC” The “timer” indicator light turns off and the “run” indicator light flashes 7 times when the unit detects refrigerant leakage.
BL	Filter cleaning Reminding.
ed	Alarm Light Flashing Slow (Outdoor Unit Error) (40WAW024 only). Outdoor unit fault.
EE	Alarm Light Flashing Fast (Water Level Error) (40WAW024 only). - Loose connection or disconnected at port on PC board. Tighten the connection or reconnect at port on PC board. - Loose connection or disconnected at port on PC board. Tighten the connection or reconnect at port on PC board. - Drain pump faulty. Replace the drain pump
FE	Operation and Timer Lights Flashing Fast Together (Address Error) Indoor unit without address. Run automatic addressing option at the outdoor unit. Use remote wireless or wired controller to readdress indoor unit.
FR	Lack of refrigerant

How to use remote controller in service mode?

Carrier Performance Series Fault Codes and Troubleshooting

Performance Residential Ductless Multi-Split Heat Pump System

Multi-Split High-Wall Ductless Split System 38GVM

Error Codes	Trouble
08	Defrost Mode 1
0A	Defrost Mode 2
F0	Low charge or refrigeration system blockage
F3	Outdoor ambient temperature sensor malfunction
F4	Outdoor mid-coil temperature sensor malfunction
F5	Outdoor discharge air temperature sensor
F7	Cooling oil return cycle
E1	System high pressure protection
E2	Indoor freeze protection
E3	System low pressure protection
E4	Compressor discharge high temperature protection
E6	Communication error between indoor and outdoor
E7	Mode conflict
E8	System overload protection
E9	Cold Blow Protection
dd	Test mode
Fo	Pump down mode
P0	IPM Rest
P5	Compressor current protection
P6	Communication error between the inverter drive and main board
P7	Heat sink temperature sensor malfunction
P8	IPM over temperature protection
P9	Open Contactor
Pc	Current sensor malfunction
Pd	Current sensor mis-wiring protection
PA	Input current protection
PF	Inverter board ambient temperature sensor malfunction
PL	Low voltage protection
PH	High voltage protection
PP	Abnormal input AC voltage
PU	Capacitor charging malfunction
H1	Heating oil return cycle
H2	Forced defrost
H3	Compressor overheat protection
H5	IPM Protection
H7	Compressor speed reduction
Hc	PFC board protection
L9	Compressor high voltage protection
Lc	Compressor start-up failure
Ld	Compressor phase loss protection
LE	Compressor stalling
LF	Compressor over-speed protection
A5	Condenser coil inlet temp sensor malfunction
A7	Condenser outlet temperature sensor malfunction
EE	Memory card error
En	Frequency limitation for module circuit protection
EU	Frequency limitation for module temperature protection
F6	Frequency limitation for overload protection
F8	Frequency limitation for system circuit protection
F9	Frequency limitation for module circuit protection
FH	Frequency limitation for freeze protection
HE	Compressor demagnetizing protection
LP	Indoor and outdoor units mismatch
U1	Compressor phase detection malfunction
U3	Low DC bus voltage
dn	Communication error between main board and EXV
13	Unit A indoor pipe outlet temperature sensor malfunction
14	Unit A indoor pipe inlet temperature sensor malfunction
15	Unit A Indoor return air sensor malfunction
16	Unit A mode conflict
17	Unit A freeze protection
23	Unit B indoor pipe outlet temperature sensor malfunction
24	Unit B indoor pipe inlet temperature sensor malfunction
25	Unit B Indoor return air sensor malfunction
26	Unit B mode conflict
27	Unit B freeze protection
33	Unit C indoor unit pipe outlet temperature sensor malfunction
34	Unit C indoor unit pipe inlet temperature sensor malfunction
35	Unit C Indoor unit return air sensor malfunction
36	Unit C mode conflict
37	Unit C freeze protection
41	Unit D communication error
42	Indoor return air temperature sensor malfunction
43	Unit D indoor pipe outlet temperature sensor malfunction
44	Unit D indoor pipe inlet temperature sensor malfunction
45	Unit D Indoor return air temperature sensor malfunction
46	Unit D mode conflict
47	Unit D freeze protection
51	Unit E communication error
52	Unit E indoor pipe midway temperature sensor malfunction
53	Unit E indoor pipe outlet temperature sensor malfunction
54	Unit E indoor pipe inlet temperature sensor malfunction
55	Unit E Indoor return air temperature sensor malfunction
56	Unit E mode conflict
57	Unit E freeze protection
C5	Jumper missing on replacement indoor board

Aircon Split Malfunction Indicator

When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5s.

Note:    o: off    ●: on    o: blink

Carrier Performance Series Troubleshooting

Problem: Indoor unit emits a bad odor on start-up

Possible Cause:

1. Air filter dirty
2. Output air still has odor after cleaning filter

Solution:

1. Clean the air filter
2. Contact your service representative

Problem: You hear water flowing noise when the unit is running

Possible Cause: This is normal and is the refrigerant flowing through the system

Solution: No maintenance required

Problem: Indoor unit produces a mist when the air conditioner is running

Possible Cause: This is normal cooling and is caused by high humidity and temperature in the room

Solution: No maintenance required. Mist should stop as room is cooled down and the humidity is removed.

Problem: Water leaks into room from Indoor unit

Possible Cause: Condensing water has overflowed

Solution: Check indoor condensing drain or call your representative

Problem: Wireless remote control does not work

Possible Cause:

1. Batteries are dead.
2. Unit needs to be reset

Solution:

1. See battery replacement section in this manual and replace batteries.
2. Turn off power to indoor unit. Remove plug from wall and then reinsert plug. Restart unit

Problem: Unit/System Does Not Work

Possible Cause:

1. To protect the unit upon an immediate restart after a stop, the system controller will delay the unit for 3 minutes before allowing the unit to start back up.
2. The circuit breaker has tripped or a fuse has blown.
3. Power failure
4. Error codes displayed
5. Voltage is too low

Solution:

1. After turning unit off, wait at least 3 minutes before trying to restart.
2. Reset the circuit breaker or replace the fuse with the specified replacement fuse.
3. Restart operation when the power is restored.
4. Call your service representative.
5. Call your service representative

Problem:  Cooling is Not Working Properly

Possible Cause:

1. The filter is blocked with dust.
2. Temperature is not set properly.
3. A window or door is open.
4. The outdoor unit is obstructed.
5. The fan speed is too low.
6. The operation mode is in Fan instead of Cool.

Solution:

1. Clean the air filter.
2. Check the temperature and reset if necessary.
3. Close the window or door.
4. Remove the obstruction.
5. Change the fan speed selection.
6. Change the operating mode to Cool or reset the unit.

Problem:  Heating is Not Working Properly

Possible Cause:

1. The filter is blocked with dust.
2. Temperature is set too low.
3. A window or door is open.
4. The outdoor unit is obstructed.

Solution:

1. Clean the air filter.
2. Check the temperature and reset if necessary.
3. Close the window or door.
4. Remove the obstruction

Problem: Unit Stops During Operation  

Possible Cause:

1. The Off timer is not operating correctly.
2. Error codes displayed

Solution:

1. Restart the operating mode.
2. Call your service representative.

How to Reset a Carrier Air Conditioner Unit?
1.Locate the “Reset” button on the control panel of the air conditioner.
2.Hold the “Reset” button for 3 seconds and then release.
3.Press and hold the “Reset” button for another 3 seconds – this time there should be a light flash on the display.
4.Wait a few moments while the unit resets.

Carrier Performance Series Manual PDF 1

Carrier Performance Series Manual PDF 2

 Carrier Split AirCon  Manual PDF 1

Carrier Split Air Conditioner Manual PDF 2

Carrier Split Aircon Manual PDF 3

Carrier Infinity Series Manual PDF

Carrier Cassette Air Conditioner Error Codes

Source: https://www.carrier.com