Heat Controller, Inc. | VMH Series | Service Manual |
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E5 & E6
9.2.5 Open or short circuit of temperature sensor diagnosis and solution
Check the connections between the sensors and the PCB. Are the connections good?
Yes |
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| Yes |
Replace the sensor and check if | |
E5 or E6 displays again? |
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P0:
9.2.6 IGBT over current protection diagnosis and solution
Check whether the connections between outdoor PCB and IPM are good?
Yes |
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| No |
Check whether the IPM is fixed to radiator | |
tightly |
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Replace the outdoor or
indoor PCB
Fastening the IPM to the radiator
Replace the IPM
The unit does not work normally
Replace the compressor
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