MINI SPLIT ERROR CODES GUIDE

**Error Code

Description**

EC07

ODU fan speed is out of control. When indoor/outdoor fan speed remains too low or too high for a certain time, the unit stops and displays the error.

EC0D

Outdoor unit malfunction. The indoor unit detects an error in the outdoor unit.

EC50

ODU temperature sensor error (T3, T4, TP). Open or short circuit. Voltage <0.06V or >4.94V triggers fault.

EC51

ODU EEPROM parameter error. PCB does not receive feedback from EEPROM chips.

EC52

ODU coil temperature sensor (T3) error. Open or short circuit.

EC53

ODU ambient temperature sensor (T4) error. Open or short circuit.

EC54

Compressor discharge temperature sensor (TP) error. Open or short circuit.

EC55

ODU IPM module temperature sensor malfunction.

EC56

IDU coil outlet temperature sensor (T2B) error (multi-zone).

EC57

Refrigerant pipe temperature sensor error.

ECC1

Refrigerant leakage detected (multi-zone). Alarm may sound from the detecting unit.

EC5A

Enthalpy inlet temperature sensor failure.

EC5B

Enthalpy outlet temperature sensor failure.

EC5E

Condenser temperature sensor (T3B) failure.

EC5C

Pressure sensor failure (abnormal voltage).

EC71

Overcurrent failure of outdoor DC fan motor.

EC72

Lack phase failure of outdoor DC fan motor.

EH00

IDU EEPROM malfunction.

EH02

Zero-crossing signal detection error / communication issue.

EH03

Indoor fan speed out of control.

EH0A

IDU EEPROM parameter error.

EH0B

Communication error between indoor main board and display board.

EH0E

Water-level alarm malfunction.

EH3A

Low voltage protection of indoor external fan DC bus.

EH3B

External fan DC bus voltage too high.

EH60

Room temperature sensor (T1) error.

EH61

Indoor coil temperature sensor (T2) error.

EH62

Evaporator inlet temperature sensor (T2B) error.

EH66

Evaporator inlet temperature sensor (T2B) error (duplicate code variant).

EH65

Evaporator coil temperature sensor (T2A) error.

EHBA

Communication error between indoor unit and external fan module.

EHC1

Refrigerant leakage detected (≥10% LFL).

EHC2

Refrigerant sensor out of range with leakage detected.

EHC3

Refrigerant sensor out of range / no feedback.

EH12

Twin system error. One indoor unit indicates another unit is faulty.

EH31

Indoor fan (1) speed malfunction.

EH32

Indoor fan (2) speed malfunction.

EL01

Communication error between indoor and outdoor units.

EL0C

Refrigerant leak detected.

EL16

Adapter board and outdoor main board communication error.

EL11

Communication error between main and secondary units.

FHCC

Refrigerant sensor error.

FL09

Indoor and outdoor unit platform mismatch.

FH07

Communication error between indoor unit and lifting panel.

PC00

IPM module protection (abnormal voltage).

PC01

Low ambient temperature or voltage protection.

PC02

Compressor/IPM high temperature protection.

PC03

High/low pressure protection.

PC04

Inverter compressor drive error.

PC0L

Low ambient temperature protection.

PC06

Compressor discharge temperature protection.

PC08

Outdoor overcurrent protection.

PC0A

Condenser high temperature protection.

PC0F

PFC module malfunction.

PC10

Low AC voltage protection.

PC11

High DC bus voltage protection.

PC12

Low DC bus voltage protection.

PC13

AC power cut off or detection circuit failure.

PC30

System high pressure protection.

PC31

System low pressure protection.

PC40

Communication error between ODU chips.

PC41

The compressor starts failing.

PC42

Compressor phase loss protection.

PC43

Abnormal phase current protection.

PC44

Zero speed protection.

PC45

IR chip drive failure.

PC46

Compressor speed out of control.

PC49

Compressor overcurrent failure.

PCA1

Refrigerant pipe condensation protection.

FH0P

AP mode without WiFi adapter.

dF

Defrost mode (normal).

CL

Self-cleaning mode.

FP

Heating below 8°C.

FC

Forced cooling mode.

AP

WiFi AP mode.

CP

Remote switched off.

nA

No malfunction.

LC06

Inverter module high temperature protection.

PH90

Evaporator high temperature protection.

PH91

Evaporator low temperature protection.

E0

Indoor EEPROM parameter error.

E1

Communication or room sensor error (multi-zone).

E2

Zero-crossing or outdoor coil sensor failure.

E3

Indoor fan speed or coil sensor failure.

E4

Room temperature sensor (T1) error.

E5

Evaporator coil temperature sensor (T2) error.

E8

Communication error.

EC

Refrigerant leakage detection.

F0

Current overload or outdoor fan failure.

F1

Outdoor ambient sensor (T4) error.

F2

Condenser coil sensor (T3) error.

F3

Discharge temperature sensor (TP) error.

F4

Outdoor EEPROM error.

F5

Outdoor fan speed issue.

F6

Sensor voltage abnormal.

F7

Indoor PCB not receiving panel signal.

F8

Panel not operating.

F9

Cassette panel not closing.

FA

Suction temperature sensor fault.

H1

Drainage fault.

H2

Indoor communication failure.

H3

Indoor liquid pipe temperature sensor failure.

H4

Indoor gas pipe temperature sensor failure.

H5

Low discharge temperature protection.

H6

Low pressure switch protection.

H7

Low pressure protection.

H8

Four-way valve fault.

H9

Communication line fault.

L0

DC voltage failure.

L1

Compressor overcurrent protection.

L2

Compressor step failure.

L3

Compressor phase loss.

L4

IPM module failure.

L5

PFC hardware overcurrent protection.

L6

PFC software overcurrent protection.

L7

Current detection is abnormal.

L8

Compressor overload protection.

L9

IPM temperature sensor failure.

LA

Compressor startup failure.

LC

PFC current detection error.

LD

DC fan current abnormal.

LE

DC fan phase loss.

LF

DC fan out of step.

LH

DC fan IPM protection.

P0

IPM or IGBT overcurrent protection.

P1

Voltage protection.

P2

High temperature protection.

P3

Low outdoor temperature protection.

P4

Compressor drive error.

P5

Mode conflict.

P6

Pressure protection.

P7

Anti-freezing protection.