Service Manual -
B-VMHxxAV-1
Troubleshooting 41
7.17 PC 43 (Outdoor compressor lack phase protection diagnosis and solution)
Description
: When the three-phase sampling current of the compressor is abnormal, especially when the current of one
or more phases is always small and almost 0, the LED displays the failure code
Recommended parts to prepare:
• Connection wire
• Compressor
• Outdoor PCB
Troubleshooting and repair:
Check the compressor three-
phase output for obvious open
circuit
Power off,then restart the unit
2 minutes later.Is it still
displaying the error code
The unit operates
normally
Check both ends of
compressor connecting
line .Are all the connections
good?
Correct the connections
Check whether the three-
phase resistance of the
compressor is symmetrical
Replace the compressor
Yes
Yes
Yes
No
No
No
Replace the main PCB
No
Trobule is solved
Yes
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 ...
Page 45: ...Service Manual B VMHxxAV 1 ...
Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...