User Manual

Page 15
Troubleshooting
mrcool.com
Operation LED Timer LED Display LED STATUS
X E0
2 times
X E1
X E2
X E3
X E4
X E5
Evaporator coil temperature sensor T2 open circuit or
short circuit
X EC
O F1
O F2
O F3
O F4
O F5
P0
P1
P2
P4
O（light） X（o） （ash）
1 time
Condenser coil temperature sensor T3 open circuit or
short circuit
Indoor unit EEPROM parameter error
Indoor / outdoor units communication error
Zero-crossing signal detection error
Indoor fan speed has been out of control
Indoor room temperature sensor T1 open circuit or short
circuit
Refrigerant leakage detection
Outdoor ambient temperature sensor T4 open circuit or
short circuit
Compressor discharge temperature sensor T5 open
circuit or short circuit
Outdoor unit EEPROM parameter error
Outdoor fan speed has been out of control
IPM malfunction or IGBT over-strong current protection
Over voltage or over low voltage protection
High temperature protection of compressor top diagno-
sis and solution (only for 9k,12k models)
Inverter compressor drive error
3 times
4 times
5 times
6 times
7 times
2 times
3 times
4 times
5 times
6 times
1 time
2 times
3 times
5 times
Indoor Unit Error Display