Mars Comfort-Aire Century VCD-SA Series Service Manual page 104

Troubleshooting
1. Safety Caution .......................................................................................................3
2. General Troubleshooting ......................................................................................4
3. Outdoor Unit Point Check Function .....................................................................7
4. Information Inquiry ...............................................................................................9
5. Error Diagnosis and Troubleshooting Without Error Code ...............................13
5.1 Remote maintenance ...................................................................................13
5.2 Field maintenance .......................................................................................14
6. Quick Maintenance by Error Code ......................................................................19
7. Troubleshooting by Error Code ...........................................................................21
7.1 EH 00 / EC 51 (EEPROM parameter error Diagnosis and Solution) ................21
7.2 EL 01 (Indoor and outdoor unit communication error Diagnosis and Solution) 22
7.3 EH 03 / EC 07 (Fan speed is operating outside of the normal range )/EC 71(Over
Current Failure of Outdoor DC Fan Motor)/EC 73(Zero-speed failure of outdoor
DC fan motor) Diagnosis and Solution ........................................................25
7.4 EH 60/EH 61/EC 53/EC 52/EC 54/EC 56/EC 57/EC 50/EC 5C (Open circuit or
short circuit of temperature sensor diagnosis and solution) ..........................27
7.5 EL 0C (Refrigerant Leakage Detection Diagnosis and Solution) .....................28
7.6 EH 0E (Water-Level Alarm Malfunction Diagnosis and Solution) ....................29
7.7 PC 00 (IPM Malfunction or IGBT Over-strong Current Protection Diagnosis and
Solution) ......................................................................................................30
7.8 PC 01 (Over Voltage or Too Low Voltage 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) Diagnosis and Solution .....................................31
7.9 PC 04 (Inverter Compressor Drive Error Diagnosis and Solution) ...................32
7.10 PC 03/PC 31 (Low Pressure Protection Diagnosis and Solution) ....................33
7.11 PC 02 (Top temperature protection of compressor or High temperature
protection of IPM module Diagnosis and Solution) .......................................34
7.12 EC 0d (Outdoor unit malfunction Diagnosis and Solution) ............................35
Contents
Service Manual - VCDxxSA