General Troubleshooting - Mars Comfort-Aire Century VCD-SA Series Service Manual

Service Manual - VCDxxSA

2. General Troubleshooting

2.1 Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer
lamp may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following
table:
Display Error Information
Indoor unit EEPROM parameter error
EH 00
Indoor / outdoor unit communication error
EL 01
Communication malfunction between adapter board and outdoor main board
EL 16
EH 03 The indoor fan speed is operating outside of the normal range(for some models)
Indoor room temperature sensor T1 is in open circuit or has short circuited
EH 60
Evaporator coil temperature sensor T2 is in open circuit or has short circuited
EH 61
Evaporator coil temperature sensor T2B is in open circuit or has short circuited
EH 62
Evaporator coil temperature sensor T2A is in open circuit or has short circuited
eh 65
EL 0C Refrigerant Leakage Detection(for some models)
Communication error between indoor two chips
EH 0
EH 0E Water-level alarm malfunction
Outdoor room temperature sensor T4 is in open circuit or has short circuited
EC 53
Condenser coil temperature sensor T3 is in open circuit or has short circuited
EC 52
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(for free-
EC 56
match indoor units)
EC 51 Outdoor unit EEPROM parameter error
The outdoor fan speed is operating outside of the normal range(for some models)
EC 07
PC 00 IPM malfunction or IGBT over-strong current protection
Over voltage or over low voltage protection
PC 01
Top temperature protection of compressor or High temperature protection of IPM module
PC 02
Inverter compressor drive error
PC 04
 Troubleshooting 4 
Solution
TS21
TS22
TS48
TS25
TS27
TS27
TS27
TS27
TS28
TS47
TS29
TS27
TS27
TS27
TS27
TS21
TS25
TS30
TS31
TS34
TS32