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Service Manual VMH SERIES Heat Controller, Inc.
39
9.2.7 Over voltage or too low voltage protection diagnosis and solution
9.2.8 High temperature protection of compressor top diagnosis and solution
Yes
Yes
No,
Charge refrigerant
Is the abnormality the same
after gas charging?
Replace the outdoor PCB.
No
Yes
Is overload protector
No
No
Is the connection good?
Is refrigerant circulation
volume normal?
Reconnect it
Does the compressor operate?
Replace it
Is the power supply good?
Replace the outdoor e-box.
Make sure the power supply is normal.
Yes
No
P2:
There is a restriction (Such as capillary
or welded points of the pipes.)
P1:
Is overload protector normal?
Is refrigerant circulation
charge correct?
Reconnect and retest