Service Manual -
B-VMHxxAV-1
Contents
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
Troubleshooting
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
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Page 37: ...Service Manual B VMHxxAV 1 Outdoor Unit 3 3 Panel Plate X430 Square grille ...
Page 38: ...Service Manual B VMHxxAV 1 Outdoor Unit 4 4 Panel Plate D30 Square grille ...
Page 39: ...Service Manual B VMHxxAV 1 Outdoor Unit 5 5 2 Service Place Minimim 4 Recommended 12 ...
Page 42: ...Service Manual B VMHxxAV 1 Outdoor Unit 8 8 A VMH18SV 1 A VMH24SV 1 ...
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