Troubleshooting Guide

1.1 Indoor Unit Error Display
Operation
lamp
Timer lamp Display LED STATUS
☆ 1 time
X E0 Indoor unit EEPROM parameter error
☆ 2 times
X E1 Indoor / outdoor units communication error
☆ 3 times
X E2 Zero-crossing signal detection error
☆ 4 times
X E3 Indoor fan speed has been out of control
☆ 5 times
X E4
Indoor room temperature sensor T1 open circuit or
short circuit
☆ 6 times
X E5
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆ 7 times
X EC Refrigerant leakage detection
☆ 1 times
O
F0
Overload current protection
☆ 2 times
O F1
Outdoor ambient temperature sensor T4 open circuit or
short circuit
☆ 3 times
O F2
Condenser coil temperature sensor T3 open circuit or
short circuit
☆ 4 times
O F3
Compressor discharge temperature sensor TP open
circuit or short circuit
☆ 5 times
O F4 Outdoor unit EEPROM parameter error
☆ 6 times
O F5 Outdoor fan speed has been out of control
☆ 1 times ☆
P0 IPM malfunction or IGBT over-strong current protection
☆ 2 times ☆
P1 Over voltage or over low voltage protection
☆ 3 times ☆
P2
High temperature protection of IPM module or
compressor top
☆ 4 times ☆
P3* Outdoor ambient temperature too low.
☆ 5 times ☆
P4 Inverter compressor drive error
☆ 6 times ☆
P5 Indoor units mode conflict (multi-zone ONLY)
☆
7 times
☆
P6
Low pressure protection(Only for 36K)
O（light） X（off） ☆（flash）
*P3
1) In heating mode, when the outdoor temperature is lower than -25℃ for 1 hour, the indoor unit
display error code P3.
2) If the outdoor temperature is higher than -22℃ for 10 minutes and compressor stop for 1 hour or
outdoor temperature is higher than -5℃ for 10 minutes, then the unit will return to work.
* Fault Symptom: The display board shows a garbled code or a code that is not an error code found
in the service manual nor a temperature reading.
Trouble shooting:
Use the remote controller. If the unit does not respond to the remote, the indoor PCB needs to be
replaced; if the unit does respond, then the display board needs to be replaced