Service Manual | VMH Series | Heat Controller, Inc. |
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E2:
9.2.3 Zero crossing check resistance or inverter compressor, it is .7Ω error
Alarm signal when the main chip can’t detect
Turn off the power supply for 5 seconds, then turn it back on.
Check power supply and
connections
Yes
Indoor PCB defective
No
Correct power supply or
correct connections
Shut off the power supply and turn on it |
| E3: INDOOR OR E7 OUTDOOR | |
| 9.2.4 Fan speed has been out of control diagnosis | ||
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| The unit does not work normally |
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Turn off the unit, rotate the cross fan. Does it rotate
Yes
Is the fan motor connector and connection good?
Yes
Is voltage being applied to the fan motor?
No
Yes
Disassemble the connection between fan and motor, check bearing. If bad, change the bearing. If ok, follow the below
Replace the fan motor
No
Replace the PCB
38
