MrCool DIY-MULTI2-18HP230C, Service Manual

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