DC Inverter Air
3. If the voltage is not normal, please replace the motherboard of outdoor unit.
E23: EEPROM fault of outdoor unit
Treatment Method:
1. Change EEPROM of outdoor unit (upgrade the EEPROM data);
2. Replace the motherboard of outdoor unit;
E30: DIP Fault of model selection of indoor/outdoor unit
Treatment Method:
1. Check whether the model DIP of outdoor unit (14) is consistent with the specified model (DIP
refers to the address DIP description of main control panel of outdoor unit);
2. Check whether the model DIP of indoor unit (14) is consistent with the specified model (DIP
refers to the address DIP description of main control panel of indoor unit);
3. Replace the motherboard of outdoor unit;
4. Replace the motherboard of indoor unit;
E32: open/short‐circuit fault of indoor ambient temperature sensor (T1 or RT)
The treatment method is the same as E05.
E33: open/short‐circuit fault of indoor ambient temperature sensor (T2 or IPT)
The treatment method is the same as E05.
E34: High pressure switch fault
Such fault occurs in the standby state or prior to the startup.
Treatment Method:
1. Use multi‐meter to check whether the high pressure switch is in open‐circuit, and if YES, please
replace the high pressure sensor;
2. Replace the motherboard of outdoor unit.
E35: Low pressure switch fault
Such fault occurs in the standby state or prior to the startup.
Treatment Method:
1. Use the pressure gauge to check whether the system pressure is normal, and if it is less than 0.2,
please supplement the refrigerant.
2. Use multi‐meter to check whether the low pressure switch is in open‐circuit, and if YES, please
replace the high pressure sensor;
3. Replace the motherboard of outdoor unit.
P01: Protection shutdown when voltage is higher than 275V or lower than 160V
Treatment Method: (voltage detection circuit in the inverter module board)
1. Use the multi‐meter to test whether the power supply between Phases A, B and C and Neutral Line
is among 180V‐260V;
2. Whether the module communication line is reliably connected with the communication interface
of main control panel;
3. Whether the power supply module is reliably connected with filter boards L and N;
4. Replace the inverter module board;
5. Replace the motherboard of outdoor unit.
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