Error Display (Outdoor Unit) - MrCool DIY-MULTI2-18HP230C Service Manual

2.2

Error Display (Outdoor unit)

Display
Defrosting
f
FC Forced cooling
Outdoor EEPROM malfunction
EC 51
Indoor / outdoor units communication error
EL 01
Communication malfunction between IPM board and outdoor main board
PC 40
Outdoor overcurrent protection
PC 08
Outdoor unit low AC voltage protection
PC 10
Outdoor unit main control board DC bus high voltage protection
PC 11
Outdoor unit main control board DC bus high voltage protection /341 MCE error
PC 12
IPM module protection
PC 00
PFC module protection
PC 0F
Over current failure of outdoor DC fan motor
EC 71
Lack phase failure of outdoor DC fan motor
EC 72
Outdoor fan speed has been out of control
EC 07
Outdoor compressor lack phase protection
PC 43
Outdoor unit zero speed protection
PC 44
Outdoor unit IR chip drive failure
PC 45
Compressor speed has been out of control
PC 46
Compressor overcurrent failure
PC 49
High pressure protection
PC 30
Low pressure protection
PC 31
High temperature protection of condenser
PC 0A
Temperature protection of compressor discharge
PC 06
Top temperature protection of compressor
PC 02
Condenser coil temperature sensor T3 is in open circuit or has short circuited
EC 52
Outdoor room temperature sensor T4 is in open circuit or has short circuited
EC 53
Compressor discharge temperature sensor TP is in open circuit or has short circuited
EC 54
Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited
EC 56
Open or short circuit of outdoor unit temperature sensor(T3,T4.TP)
EC 50
IPM module frequency limit shutdown/IPM high temperature protection
LC 06
Low ambient temperature protection
PC 0L
Malfunction or Protection
 Troubleshooting 6 
Solution
Normal
Display, not
error code
TS27
TS28
TS40
TS34
TS38
TS38
TS38
TS36
TS41
TS31
TS51
TS31
TS52
TS34
TS53
TS34
TS34
TS47
TS49
TS43
TS42
TS46
TS33
TS33
TS33
TS33
TS33
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