| Phase sequence error |
| Communication error between indoor and master unit |
| T3/T4 temperature sensor error |
| Abnormal power supply voltage |
| 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 |
| Quantity of outdoor unit decreases 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 |
| 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) |
| 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 |
