All AC Error Code List - Description
Dear readers, here we are offering All AC Error Code List PDF to all of you. If you are using an air conditioner and it’s showing some type of error then you should go through this list so that know the exact problem of the air conditioner. All AC error code list pdf contains the codes that are used to understand the real issue. I have listed some of the most common AC errors in the article, for which you can take help.
Remember that most air conditioner problems are caused by airflow or power requirements. So let’s start from the beginning. Companies use some codes to show errors related to AC ie Air conditioners. This makes it easier for the user, manufacturer, and mechanic to understand and fix errors. Each air conditioner company uses different codes. If your Air Conditioner is displaying a code other than the AC Error Code given below, then comment and tell.
All Ac Error Code List PDF Download / LG AC Indoor Unit Error Code List
|1||Indoor unit room temperature sensor error|
|2||Indoor unit inlet pipe sensor error|
|3||Wired remote control error|
|4||Float switch error|
|5||Communication errors between the indoor and outdoor units|
|6||Indoor unit outlet pipe sensor error|
|9||Indoor unit EEPROM error|
|10||Indoor unit BLDC fan motor lock|
|12||Indoor unit middle pipe sensor error|
LG AC Outdoor Unit Error Code List
|21||DC Peak (IPM) Fault – Compressor DC voltage is too high|
|22||CT2 (Max CT) – Alternating current input too high|
|23||DC Link Low Voltage|
|25||AC Low/High Voltage|
|26||DC Comp Position Error (not providing rotation – locking)|
|27||PSC Fault – Current to inverter compressor between AC and DC converter is too high|
|28||Inverter Compressor DC voltage is too high|
|29||Comp Phase Over-current – Inverter compressor amperage is too high|
|31||Current-to-current transformer (CT) thermistor is too low|
|32||Inverter Compressor Discharge pipe overheat|
|34||High-pressure sensor high|
|35||Low-pressure sensor low|
|36/38||Refrigerant Leak detection|
|37||Exceed the compression ration limit|
|40||CT sensor error – Thermistor is disconnected or shorted out|
|41||Discharge Pipe sensor error – INV is disconnected or shorted out|
|42||Low-Pressure sensor error|
|43||High-Pressure sensor error|
|44||Outdoor air sensor error – Disconnected or shorted out|
|45||Condenser middle pipe sensor error – Disconnected or shorted out|
|46||Suction pipe sensor error – Disconnected or shorted out|
|48||Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out|
|51||Excess capacity – Mismatch between IDU and ODU|
|53||Communication error – between the IDU and ODU|
|60||Outdoor unit printed circuit board (PCB) EEPROM checksum error|
|61||Condenser coil temperature is too high|
|62||Heat sink sensor temperature – high|
|63||Condenser coil pipe thermistor temperature is low|
|65||Heat sink thermistor has disconnected or shorted out|
|67||BLDC motor fan lock|
|72||Detect 4-way valve transfer failure|
Indoor Error Codes List
- CODE: E0. RESULT: Indoor unit EEPROM parameter error
- CODE: E1. RESULT: Indoor / outdoor units communication error.
- CODE: E3. RESULT: Indoor fan speed has been out of control.
- CODE: E4. RESULT: Indoor room temperature sensor T1 open circuit or short circuit.
- CODE: E5. RESULT: Evaporator coil temperature sensor T2 open circuit or short circuit.
- CODE: EC. RESULT: Refrigerant Leakage Detection.
- CODE: F1. RESULT: Outdoor ambient temperature sensor T4 open circuit or short circuit.
- CODE: F2. RESULT: Condenser coil temperature sensor T3 open circuit or short circuit.
- CODE: F3. RESULT: Compressor discharge temperature sensor T5 open circuit or short circuit.
- CODE: F4. RESULT: Outdoor unit EEPROM parameter error.
- CODE: F5. RESULT: Outdoor fan speed has been out of control.
- CODE: P0. RESULT: IPM malfunction or IGBT over-strong current protection.
- CODE: P1. RESULT: Overvoltage or over low voltage protection.
- CODE: P2. RESULT: High-temperature protection of compressor top diagnosis and solution.
- CODE: P4. RESULT: Inverter compressor drive error.
- CODE: P5. RESULT: Mode conflict.
- CODE: P6. RESULT: Compressor voltage protection.
- Outdoor Error Codes List
- CODE: E0. RESULT: Outdoor EEPROM malfunction.
- CODE: E2. RESULT: Indoor/outdoor units communication error.
- CODE: E3. RESULT: Communication malfunction between IPM board and outdoor mainboard.
- CODE: E4. RESULT: Open or short circuit of the outdoor unit temperature sensor.
- CODE: E5. RESULT: Voltage protection.
- CODE: E8. RESULT: Outdoor fan speed malfunction.
- CODE: F1. RESULT: No. A Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F2. RESULT: No. B Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F3. RESULT: No. C Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F4. RESULT: No. D Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F5. RESULT: No. E Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: P1. RESULT: High-pressure protection.
- CODE: P2. RESULT: Low-pressure protection.
- CODE: P3. RESULT: Current protection of compressor.
- CODE: P4. RESULT: Temperature protection of compressor.
- CODE: P5. RESULT: High-temperature protection of condenser.
- CODE: P6. RESULT: IPM module protection.
Daikin AC Error Code List
Error Code and meaning
AO Indoor Error of external protection device
A1 Indoor PCB defect
A3 Indoor Malfunction of drain Level control system
A5 Indoor Freeze-up prevention
A6 Indoor Fan motor lock – overload
A7 Indoor Malfunction of swing motor flap
A9 Indoor Malfunction of EEV
AF Indoor Drain level above limit – clogged
AJ Indoor Malfunction of capacity set device
C3 Indoor Malfunction of drain thermistor
C4 Indoor Malfunction of liquid pipe thermistor
C5 Indoor Malfunction of gas pipe thermistor
C7 Indoor Lower louvre limit switch – motor
C9 Indoor Malfunction of air thermistor
CC Indoor Malfunction of moisture sensor
CA Indoor Malfunction of discharge air thermistor
CJ Indoor Malfunction of remote control thermistor
CE Indoor Malfunction of radiant heat sensor
E0 Outdoor Activation of outdoor safety device
E1 Outdoor PCB defect
E3 Outdoor Activation of high pressure switch
E4 Outdoor Activation of low pressure switch
E5 Outdoor Activation of compressor over heat protection
E5 Outdoor Compressor motor lock
E6 Outdoor Compressor start up error
E6 Outdoor Standard compressor lock overcurrent
E7 Outdoor Fan motor lock – Overload
E8 Outdoor Inverter input overcurrent
E9 Outdoor Malfunction of EEV
EA Outdoor Four way valve defective
F3 Outdoor Abnormal discharge pipe temperature
F6 Outdoor Refrigerant overcharged
FC Outdoor Low pressure drop
H3 Outdoor High pressure switch defect
H4 Outdoor Low pressure switch defect
H6 Outdoor Compressor motor position detection sensor error
H7 Outdoor Fan motor position detection sensor error
H8 Outdoor Current transformer error
H9 Outdoor Malfunction of air thermistor
J1 Outdoor Faulty/Fault of pressure sensor
J2 Outdoor Current sensor Faulty/Fault
J3 Outdoor Faulty/Fault of discharge pipe thermistor
J4 Outdoor Low pressure saturation thermistor
J5 Outdoor Faulty/Fault of suction pipe thermistor
J6 Outdoor Faulty/Fault of heat exchanger thermistor
J7 Outdoor Faulty/Fault of heat exchanger liquid thermistor
J8 Outdoor Faulty/Fault of liquid pipe thermistor
J9 Outdoor Faulty/Fault of gas pipe thermistor
JA Outdoor Faulty/Fault of discharge pipe pressure sensor
JC Outdoor Faulty/Fault of suction pipe pressure sensor
JH Outdoor Faulty/Fault of oil temperature sensor
L0 Outdoor Malfunction of inverter
L3 Outdoor Electronic component box overheat
L4 Outdoor Inverter cooling defect
L5 Outdoor Comp motor ground fault Short circuit
L6 Outdoor Compressor motor grounding short circuit
L7 Outdoor Total input overcurrent
L8 Outdoor Comp overload – Motor disconnected
L9 Outdoor Compressor lock
LA Outdoor Power unit malfunction
LC Outdoor Transmission between inverter and outdoor
P1 Outdoor Inverter over ripple
P3 Outdoor Thermistor abnormality
P4 Outdoor Power unit humidity sensor malfunction
PJ Outdoor Failure of capacity set resistor
U0 System Shortage of refrigerant or EEV failure
U1 System Negative phase, Open phase
U2 System Power supply insufficient
U3 System Wiring check operation not executed
U3 System Mismatch of indoor and outdoor units – Split only
U4 System Transmission between indoor units
U5 System Transmission to remote controller
U6 System Malfunction transmission outdoor to BP unit
U7 System Transmission between outdoor units
U8 System Transmission between master and slave RC
U9 System Transmission error between indoor to outdoor
UA System Excessive number of fan coils
UC System Address duplication of central controllers
UE System Transmission error between indoor and central
UF System Refrigeration system not set wiring – piping
UF System Terminals 1 and 3 crossed (Split Skyair)
UH System Error with Refrigeration system set up
Fujitsu AC Error Code List
00 Communication error (indoor unit to remote controller)
01 Communication error (indoor unit to outdoor unit)
02 Room temperature sensor
03 Room temperature sensor short-circuited
04 Indoor heat exchanger temperature sensor open
05 Indoor heat exchanger temperature sensor short-circuited
06 Outdoor heat exchanger temperature sensor open
07 Outdoor heat exchanger temperature sensor short-circuit
08 Error contents = Power source connection error
09 Float switch operated
0A Outdoor temperature sensor open
0b Outdoor temperature sensor short-circuited
0c Discharge pipe temperature sensor open
0d Discharge pipe temperature sensor short-circuited
0E Outdoor high pressure abnormal
0F Discharge pipe temperature abnormal
11 Model abnormal
12 Indoor fan abnormal
13 Outdoor signal abnormal
14 Outdoor EEPROM abnormal
OUTDOOR UNIT LEDS When the outdoor temperature drops, the outdoor units fans may switch to low speed.
LG Air Conditioner Error Code List PDF
CH01 Indoor unit return air sensor fault.
CH02 Indoor Pipe Sensor or Outdoor Sensor Assembly fault, Open or Short.
CH03 Remote controller comms error. Check wired correctly, if so check dipswitch in RC. Set to Sg for 1 unit, or Gr for group then reset power.
CH04 RAC Product = Heat Sink Sensor Error, Open/Short Circuit or over 95C. Commercial Product = Condensate pump float switch risen. Check drain pan is empty, check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float.
CH05 Comms Error, check your wiring, remove external pumps. Split/Multi – check volts from terminal N to 3 = 0 – 65 Vdc, Multi V – 4 Vdc terminals 3 and 4.
CH06 Indoor unit coil sensor fault.
CH07 Multi Splits and Multi V = indoor unit is set to run in a different mode from the master indoor unit. Set ALL indoor units to cooling or ALL to heating to clear. Splits = Compressor Over Current (CT2), also see Code 06.
RAC Indoor unit BLDC Fan problem. This is caused by the Indoor fan being locked. Check fan motor is plugged in correctly, Electrically & Mechanically sound.
CH08 Check the fan motor turns freely, check the AC Voltage supplied to the fan motor, this will vary from 120 V ac at low speed to 170V AC at high speed. If no voltage is present the PCB is faulty, if voltage is present the fan motor will be faulty.
CH09 Split = Outdoor unit fan problem. Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB. Multi V = indoor PCB failure. Replace PCB.
CH10 RAC Product: Compressor discharge sensor fault.
CH11 Multi V indoor unit not connected to an outdoor unit. Check comms wiring is correct, and check initialisation has been carried out correctly.
CH21 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms, check to earth 50 MOhm minimum.
CH22 Inverter compressor run current high. Check compressor windings all equal 1 to 4 Ohms . Check to earth 50 MOhm minimum.
CH23 Inverter dc voltage low. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB.
CH24 Splits and Multi Splits = High or low pressure trip.
CH25 Check power supply voltage to the outdoor unit is correct (1ph ?220 Vac ±10% or 3ph ?380 Vac ±10%). If OK, check fuses, if fuses are OK replace outdoor main PCB.
CH26 Inverter compressor seized.
CH27 Inverter current irregularity. Check inverter PCB and reactor.
CH28 Inverter dc voltage too high. Check dc voltage of capacitors 300 Vdc for 1Ph and 600 Vdc for 3Ph. If OK change outdoor inverter PCB.
CH32 Inverter compressor discharge temperature too high. If over 105°C, check refrigerant charge.
CH33 Excessive rise of standard compressor discharge temperature. If over 105°C check refrigerant charge.
CH34 Excessive high pressure rise.
CH35 Excessive low pressure drop under 1 Bar at LP sensor. Check pressures, and check service valves open.
CH40 Inverter ac current abnormal. Check compressor windings all equal resistance 1 to 4 Ohms, check to earth 50 MOhm minimum.
CH41 Inverter compressor discharge sensor fault.
CH42 Low pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 4 bar up to 5 Vdc = 32 bar.
CH43 High pressure sensor fault. Check dc voltage between white and black cable on plug. Multi V: 1 Vdc = 8 bar up to 2.5 Vdc = 37 bar.
CH44 Outdoor unit air sensor fault.
CH45 Outdoor unit coil sensor fault.
CH46 Outdoor unit suction sensor fault.
CH47 Compressor discharge sensor fault.
CH48 Split/Multi Split = Outdoor unit discharge and air sensor both unplugged.
CH49 Check power supply voltage to the outdoor unit is correct (1ph = 220 Vac ±10% or 3ph = 380 Vac ±10%). If OK check fuses, if fuses OK, replace outdoor main PCB.
CH52 Communication error between inverter PCB and main outdoor unit PCB. Check wiring fuses and LEDs . If OK either inverter or main PCB defective.
CH53 Comms error indoor to outdoor unit. Check your wiring . Split and Multi – check voltage from terminal N to 3 = 0 – 65 Vdc, Multi V – 4 Vdc terminals 3 and 4.
CH54 Reverse or open phase.
CH57 Comms error between outdoor main PCB and inverter PCB. Check wiring fuses and LEDs are lit. If OK either inverter or main PCB defective.
CH60 Outdoor unit PCB EEPROM failure, try removing EEPROM and refitting if removable (possible contact fault), otherwise replace PCB if the EEPROM is non-removable.
CH61 Condenser coil over 65°C.
CH62 Inverter over 85°C. Check air flow across heat sink, check inverter tight to heatsink use thermal paste.
CH65 Outdoor unit inverter fin temperature sensor fault.
CH67 Outdoor Fan Motor seized, or rotation sensing circuit failure.
CL Child Lock. Press Timer & Min buttons simultaneously for 5 seconds to engage/disengage function.
HL Condensate pump float switch risen. Check drain pan is empty, check pump is working OK. If no pump check blue jumper plug is inserted in socket CN Float. Alternatively, Dry Contact Interface is in “OFF” condition. Check status and adjust as necessary.
Po Jet Cool Mode selected. To cancel press Jet Cool, Fan Speed or Set Temperature button.
Mitsubishi Electric AC Error Code List
E1 The remote controller wire Y is open. The remote controller wires X and Y are reversely connected. Noise is penetrating the remote control lines. The remote controller or indoor control PCB is faulty.
E5 Indoor / outdoor transmission error. Outdoor unit control PCB is faulty when the power is turned on, or the inverter parts are faulty (FDCVA 151~251 type).
E6 Indoor unit heat exchanger thermistor failure.
E7 Indoor unit return air thermistor failure.
E8 Heating overload (indoor heat exchanger temperature is abnormally high) and indoor heat exchanger thermistor is faulty.
E9 The float SW operates (with FS only). Drain up kit wiring fault.
E10 When multi-unit control by remote controller is performed, the number of units is over (more than 17 units).
E16 Fan motor is faulty (FDTA 501, 601 type, FDKN type).
E28 Remote controller thermistor failure.
E32 Wiring is open or reversal phase (FDCA 301~601 type).
E33 Inverter primary side current is abnormal. (FDCVA151~251 type). Abnormal current cut of compressor (FDCA 301~601 type).
E34 52C secondary side L3-phase wiring is open. (FDCA 301~601 type).
E35 Outdoor heat exchanger temperature is high or outdoor heat exchanger thermistor is faulty.
E36 Discharge temperature abnormality.
E37 Outdoor unit heat exchanger thermistor failure.
E38 Outdoor air temperature thermistor failure.
E39 Discharge pipe thermistor failure.
E40 63H1 operation (FDCA 301~601 type).
E42 Current (Abnormalities in a compressor over current).
E47 Inverter Over-voltage Trouble. (FDCVA 151~251 type).
E48 DC fan motor abnormal. (FDCVA 151~251 type).
E52 52C abnormal. (FDCA 301~601 type).
E56 Power transistor thermistor is faulty or disconnection or connector connections are poor. (FDCVA 151~251 type).
E57 Insufficient refrigerant.
E59 Compressor start-up error (FDCVA 151~251 type).
E60 Compressor loader position detection error. (FDCVA 151~251 type).
Panasonic AC Error Code List PDF
S01 Room temperature sensor failure.
S02 Indoor coil sensor failure.
S03 Humidity sensor failure Replace indoor board.
S04 Comp. temperature sensor failure.
S05 Outdoor coil sensor failure.
S06 Outdoor air sensor failure.
S07 Outdoor current sensor failure. Replace outdoor board.
E01 Indoor/outdoor communication failure.
E02 HIC circuit failure (Compressor/Fan circuit).
E03 Outdoor unit OTP rom failure.
E04 Peak current cut off.
E05 PAM or Active circuit failure.
E06 High compressor discharge temperature.
E07 Indoor fan operating failure.
E08 4 way valve switching failure (RV).
E09 No refrigerant protection.
E10 DC compressor drive circuit failure.
E11 Outdoor fan operating failure.
E12 Error in outdoor unit.
E13 Freeze prevention activated.
H00 No abnormality detected.
H11 Indoor / Outdoor abnormal communication. > 1 min after starting operation. Indoor fan operation only • Internal / external cable connections. • Indoor / Outdoor PCB.
H12 Connection capability rank abnormal.
H14 Indoor intake air temperature sensor abnormality. Continue for 5 sec. Intake air temperature sensor (detective or disconnected).
H15 Outdoor compressor temperature sensor abnormality. Continue for 5 sec. Compressor temperature sensor (detective or disconnected).
H16 Outdoor Current Transformer open circuit. Outdoor PCB or IPM (Power transistor) module.
H19 Indoor fan motor mechanism locked. 7 times occurrence continuously. Indoor PCB or/and Fan motor.
H23 Indoor heat exchanger temperature sensor abnormality. (Cooling only) Heat exchanger temperature sensor (detective or disconnected).
H24 Indoor heat exchanger temperature sensor 2 abnormality. Continue for 5 sec. Heat exchanger temperature sensor (detective or disconnected).
H27 Outdoor intake air temperature sensor abnormality. Continue for 5 sec. Outdoor temperature sensor (detective or disconnected).
H28 Outdoor heat exchanger temperature sensor abnormality. Continue for 5 sec. Outdoor heat exchanger temperature sensor (detective or disconnected).
H30 Outdoor discharge air temperature sensor abnormality Continue for 5 sec. Outdoor temperature sensor (detective or disconnected).
H33 Indoor / Outdoor wrong connection. Indoor / Outdoor supply voltage.
H38 Indoor / Outdoor mismatch (brand code).
H50 Ventilation motor abnormality. 7 times occurrence continuously. Indoor PCB / Ventilation motor.
H51 Nozzle lock abnormality. 2 times occurrence continuously.
H52 Limit switch abnormality. Indoor PCB.
H97 Outdoor fan motor mechanism locked. 2 times occurrence within 30 minutes. Indoor PCB / Fan motor.
H98 Indoor high pressure protection . Air filter dirty.
H99 Indoor heat exchanger anti-freezing protection. Insufficient refrigerant or Air filter dirty.
F11 Cooling / Heating cycle changeover abnormality. 4 times occurrence within 30 minutes. 4-way valve/ V-coil.
F90 PFC control. 4 times occurrence within 10 minutes. Voltage at PFC.
F91 Refrigeration cycle abnormality. 2 times occurrence within 20 minutes. No refrigerant (3-way valve is closed).
F93 Compressor rotation failure. 4 times occurrence within 20 minutes. Compressor failure.
F95 Cool high pressure protection. 4 times occurrence within 20 minutes. Outdoor refrigerant circuit.
F96 IPM (power transistor) overheating protection. 4 times occurrence within 30 minutes. Excess refrigerant/ Improper heat radiation / IPM (Power transistor).
F97 Outdoor compressor overheating protection. 4 times occurrence within 10 minutes. Insufficient refrigerant / Compressor.
F98 Total running current protection. 3 times occurrence within 20 minutes. Excess refrigerant / Improper heat radiation.
F99 Outdoor Direct Current (DC) peak detection. 7 times occurrence continuously. Outdoor PCB/ IPM (Power transistor) / Compressor.
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