950-0289revB - 40 - July 22, 2022
ERROR CODES ON OUTDOOR PC BOARD
Display
INFORMATION
dF
Defrost
– Normal operation
FC
Forced cooling
– Normal operation
PH
Compressor pre-heating (for Five-Port unit only)
RO
Oil return process (for Five-Port unit only)
LC
Low ambient cooling mode (for Five-Port unit only)
E6
PFC module protection occurs three times within 15 minutes (for Five-Port unit only)
EL 01
Indoor and outdoor
units’ communication error
EC 50
Open or short circuit of outdoor unit temperature sensor (T3, T4, T5)
EC 51
Outdoor unit EEPROM parameter error
EC 52
Condenser coil temperature sensor T3 open circuit or short circuit
EC 53
Outdoor ambient temperature sensor T4 open circuit or short circuit
EC 54
Compressor discharge temperature sensor Tp open circuit or short circuit
EC 56
Evaporator coil outlet temperature sensor T2b open circuit or short circuit
EC 71
Over current failure of outdoor DC fan motor
EC 72
Lack phase failure of outdoor DC fan motor
EC 07
Outdoor fan speed has been out of control
PC 00
IPM malfunction or IGBT over-strong current protection
PC 0A
High temperature protection of condenser
PC 0F
PFC module protection
PC 0L
Low ambient temperature protection
PC 02
High temperature protection of compressor
PC 06
Compressor discharge temperature protection
PC 08
Outdoor current overload protection
PC 10
Outdoor unit low AC voltage protection
PC 11
Outdoor unit main control board DC bus high voltage protection
PC 12
Outdoor unit main control board DC bus high voltage protection /341 MCE error
PC 40
Communication error between outdoor main board and IPM board
PC 43
Outdoor compressor lack phase protection
PC 44
Outdoor unit zero speed protection
PC 45
Outdoor unit IR chip drive failure
PC 46
Compressor speed has been out of control
PC 49
Compressor overcurrent failure
