Carrier AC Error Codes List and Solution

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.

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.

Indoor Unit Codes

Error CodesMeaning
E0Indoor unit EEPROM parameter error
E1Indoor / outdoor units communication error
E3Indoor fan speed has been out of control
E4Indoor room temperature sensor T1 open circuit or shortcircuit
E5Evaporator  coil  temperature  sensor  T2  open  circuit  or short circuit
ECRefrigerant Leakage Detection
F1Outdoor  ambient  temperature  sensor  T4  open  circuit  or short circuit
F2Condenser  coil  temperature  sensor  T3  open  circuit  or short circuit
F3Compressor   discharge   temperature   sensor   T5   open circuit or short circuit
F4Outdoor unit EEPROM parameter error
F5Outdoor fan speed has been out of control
P0IPM malfunction or IGBT over-strong current protection
P1Over voltage or over low voltage protection
P2High temperature protection of compressor top diagnosis and solution
P4Inverter compressor drive error
P5Mode conflict
P6Compressor voltage protection

Outdoor Unit Codes

Error CodesMeaning
E0Outdoor EEPROM malfunction
E2Indoor/outdoor units communication error
E3Communication malfunction between IPM board and outdoor main board
E4Open or short circuit of outdoor unit temperature sensor
E5Voltage protection
E8Outdoor fan speed malfunction
F1No A Indoor unit coil outlet temperature sensor or connector of sensor is defective
F2No B Indoor unit coil outlet temperature sensor or connector of sensor is defective
F3No C Indoor unit coil outlet temperature sensor or connector of sensor is defective
F4No D Indoor unit coil outlet temperature sensor or connector of sensor is defective
F5No E Indoor unit coil outlet temperature sensor or connector of sensor is defective
P1High pressure protection
P2Low pressure protection
P3Current protection of compressor
P4Temperature protection of compressor
P5High temperature protection of condenser
P6IPM module protection

Outdoor Check Function

CodesMeaning
00Normal display
01Number of indoor units in good connection
02Outdoor unit running mode
03A indoor unit capacity HP
04B indoor unit capacity HP
05C indoor unit capacity HP
06D indoor unit capacity HP
07E indoor unit capacity HP
08A Indoor unit capacity demand code
09B Indoor unit capacity demand code
10C Indoor unit capacity demand code
11D Indoor unit capacity demand code
12E Indoor unit capacity demand code
13Total indoor units amendatory capacity demand code
14Target frequency corresponding to the total indoor units amendatory capacity demand
15Target frequency after the frequency limit

Judgment by Flashing LED of Indoor Unit

Judgment by Flashing LED of Indoor Unit
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.
CodesCause
0CShort-circuit or disconnection of the room temperatur sensor (TA sensor)
0dBeing out of place, disconnection, short-circuit, or migration of heat exchanger sensor (TC sensor)
11Lock of indoor fan or trouble on the indoor fan circuit
12Trouble on other indoor P.C. boards
04Return 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
05Operation command signal is not sent to outdoor side
14Inverter over-current protective circuit operates. (Short time)
16Position-detect circuit error or short-circuit between windings of compressor
17Current-detect circuit error
18Being out of place, disconnection or short- circuit of outdoor temp. sensor
19Disconnection or short- circuit of discharge temp. sensor
1AOutdoor fan drive system error
1bOutdoor heat exchanger temp. sensor error
1CCompressor drive output error, Compressor error (lock, missing, etc.), Break down
07Return serial signal has been sent when operation started, but it is not sent from halfway
1dCompressor does not rotate
1EDischarge temp. exceeded 117°C
1FBreak down of compressor
08Four-way valve inverse error

Infinity Series Air Conditioners

Carrier Infinity Series AC Error Codes
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.

1

2

Inverter Window Room AC

Carrier Window Room AC Fault Codes
Carrier Window Room AC Fault Codes

Operate the fan without cooling until the frost disappears. 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.

Error CodesSolutions
E1Loss 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.
E2Open circuit or out-of-range indoor temperature sensor. All heat , cool, and dehumidify operations will be locked out. Manual fan operation will continue.
E3Indoor Temperature Sensor. All heat, cool, and dehumidify operation will be locked out. Manual fan operation will continue.
E4Open 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.
E5Open 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.
E6Open circuit Humidity Sensor (Select Models). Air conditioner and dehumidification will be locked out. Heat pump, furnace heat strip and fan can continue to operate.
E7Loss of 120 VAC power to all power module boards on the system. The system will shut down.
E8Invalid 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.
E9Invalid 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.

Other Models Fault Codes

Fault CodeSolution
nFAir 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.
clAir 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.
ecRefrigerant 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.
BLFilter cleaning Reminding.
edAlarm Light Flashing Slow (Outdoor Unit Error) (40WAW024 only). Outdoor unit fault.
EEAlarm 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
FEOperation 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.
FRLack of refrigerant

Performance Series Fault Codes

Performance Residential Ductless Multi-Split Heat Pump System. Multi-Split High-Wall Ductless Split System 38GVM.

Carrier Performance Series Error Codes and Troubleshooting
Carrier Performance Series Error Codes and Troubleshooting
Error CodesTrouble
08Defrost Mode 1
0ADefrost Mode 2
F0Low charge or refrigeration system blockage
F3Outdoor ambient temperature sensor malfunction
F4Outdoor mid-coil temperature sensor malfunction
F5Outdoor discharge air temperature sensor
F7Cooling oil return cycle
E1System high pressure protection
E2Indoor freeze protection
E3System low pressure protection
E4Compressor discharge high temperature protection
E6Communication error between indoor and outdoor
E7Mode conflict
E8System overload protection
E9Cold Blow Protection
ddTest mode
FoPump down mode
P0IPM Rest
P5Compressor current protection
P6Communication error between the inverter drive and main board
P7Heat sink temperature sensor malfunction
P8IPM over temperature protection
P9Open Contactor
PcCurrent sensor malfunction
PdCurrent sensor mis-wiring protection
PAInput current protection
PFInverter board ambient temperature sensor malfunction
PLLow voltage protection
PHHigh voltage protection
PPAbnormal input AC voltage
PUCapacitor charging malfunction
H1Heating oil return cycle
H2Forced defrost
H3Compressor overheat protection
H5IPM Protection
H7Compressor speed reduction
HcPFC board protection
L9Compressor high voltage protection
LcCompressor start-up failure
LdCompressor phase loss protection
LECompressor stalling
LFCompressor over-speed protection
A5Condenser coil inlet temp sensor malfunction
A7Condenser outlet temperature sensor malfunction
EEMemory card error
EnFrequency limitation for module circuit protection
EUFrequency limitation for module temperature protection
F6Frequency limitation for overload protection
F8Frequency limitation for system circuit protection
F9Frequency limitation for module circuit protection
FHFrequency limitation for freeze protection
HECompressor demagnetizing protection
LPIndoor and outdoor units mismatch
U1Compressor phase detection malfunction
U3Low DC bus voltage
dnCommunication error between main board and EXV
13Unit A indoor pipe outlet temperature sensor malfunction
14Unit A indoor pipe inlet temperature sensor malfunction
15Unit A Indoor return air sensor malfunction
16Unit A mode conflict
17Unit A freeze protection
23Unit B indoor pipe outlet temperature sensor malfunction
24Unit B indoor pipe inlet temperature sensor malfunction
25Unit B Indoor return air sensor malfunction
26Unit B mode conflict
27Unit B freeze protection
33Unit C indoor unit pipe outlet temperature sensor malfunction
34Unit C indoor unit pipe inlet temperature sensor malfunction
35Unit C Indoor unit return air sensor malfunction
36Unit C mode conflict
37Unit C freeze protection
41Unit D communication error
42Indoor return air temperature sensor malfunction
43Unit D indoor pipe outlet temperature sensor malfunction
44Unit D indoor pipe inlet temperature sensor malfunction
45Unit D Indoor return air temperature sensor malfunction
46Unit D mode conflict
47Unit D freeze protection
51Unit E communication error
52Unit E indoor pipe midway temperature sensor malfunction
53Unit E indoor pipe outlet temperature sensor malfunction
54Unit E indoor pipe inlet temperature sensor malfunction
55Unit E Indoor return air temperature sensor malfunction
56Unit E mode conflict
57Unit E freeze protection
C5Jumper 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

How to Use Remote Controller in Service Mode?

How to use remote controller in service mode?
How to use remote controller in service mode?

Remote Control Buttons Meaning

Carrier Performance Series AC Remote Control
Carrier Performance Series AC Remote Control
Carrier AC Remote Control Display
Carrier AC Remote Control Display
Manuals Pdf

Performance Series Manual 1

Performance Series Manual 2

Split AirCon  Manual 1

Split Air Conditioner Manual 2

Split Aircon Manual  3

Infinity Series Manual

References

carrier.com

carrierair.com.au/installer-and-technical-support/service-manuals/

Danny Reese


*If you can't find the code you're looking for on our site, please let us know, and we'll update our database as soon as possible.

190 thoughts on “Carrier AC Error Codes List and Solution”

    • Hi Jamshaid, Thank you for your kind comments. Can you give information about the air conditioner type and model number?

      Reply

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