Service Manual -
B-VMHxxAV-1
Troubleshooting 4
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
Solution
EH 00
Indoor unit EEPROM parameter error
TS21
EL 01
Indoor / outdoor unit communication error
TS22
EL 16
Communication malfunction between adapter board and outdoor main board
TS48
EH 03
The indoor fan speed is operating outside of the normal range(for some models)
TS25
EH 60
Indoor room temperature sensor T1 is in open circuit or has short circuited
TS27
EH 61
Evaporator coil temperature sensor T2 is in open circuit or has short circuited
TS27
EH 62
Evaporator coil temperature sensor T2B is in open circuit or has short circuited
TS27
eh 65
Evaporator coil temperature sensor T2A is in open circuit or has short circuited
TS27
EL 0C
Refrigerant Leakage Detection(for some models)
TS28
EH 0
Communication error between indoor two chips
TS47
EH 0E
Water-level alarm malfunction
TS29
EC 53
Outdoor room temperature sensor T4 is in open circuit or has short circuited
TS27
EC 52
Condenser coil temperature sensor T3 is in open circuit or has short circuited
TS27
EC 54
Compressor discharge temperature sensor TP is in open circuit or has short circuited
TS27
EC 56
Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited(for free-
match indoor units)
TS27
EC 51
Outdoor unit EEPROM parameter error
TS21
EC 07
The outdoor fan speed is operating outside of the normal range(for some models)
TS25
PC 00
IPM malfunction or IGBT over-strong current protection
TS30
PC 01
Over voltage or over low voltage protection
TS31
PC 02
Top temperature protection of compressor or High temperature protection of IPM module
TS34
PC 04
Inverter compressor drive error
TS32
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
Page 30: ...Service Manual B VMHxxAV 1 ...
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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Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...