Error codes

Phase sequence error

Communication error between indoor and master unit

Only displayed on the master unit with the error

T3/T4 temperature sensor error

Abnormal power supply voltage

Reserved

Reserved

Discharge temperature sensor error

Outdoor unit address error

EEPROM mismatch of compressor

DC bus voltage error

T6B temperature sensor error

T6A temperature sensor error

Electronic expansion valve connection error

Communication error between main board and compressor drive board

Quantity of outdoor unit decreases error

Only displayed on the master unit with the error

Quantity of outdoor unit decreases error

Only displayed on the master unit with the error

Inverter-module protection

3 times of P2 protection in 60 minutes

3 times of P2 protection in 60 minutes

Quantity of indoor units mismatching

Only displayed on the master unit with the error

High pressure sensor error

10 times of P9 protection in 120 minutes

Slave unit malfunction
(y=1,2; e.g. 1Hd stands for slave unit 1 error)

Only displayed on the master unit with the error

3 times of PL protection in 100 minutes

High pressure protection or discharge temperature switch protection

Low pressure protection

Compressor current protection

Discharge temperature protection

High temperature protection of condenser

Fan module protection

Inverter module temperature protection

Compressor discharge insufficient superheat protection

Inverter compressor module error

DC bus low voltage protection

DC bus high voltage protection

MCE error

Zero speed protection

Phase sequence protection

Compressor frequency variation greater than 15 Hz within one second protection

Actual compressor frequency differs from target frequency by more than 15 Hz protection