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Heat Controller, Inc. VMH SERIES Service Manual
38
9.2.5 Open or short circuit of temperature sensor diagnosis and solution
9.2.6 IGBT over current protection diagnosis and solution
Yes
Replace the outdoor or
indoor PCB
Yes
Check the connections between
the sensors and the PCB. Are the
connections good?
Replace the sensor and check if
E5 or E6 displays again?
Yes
Fastening the IPM to the radiator
No
Check whether the connections between
outdoor PCB and IPM are good?
Check whether the IPM is fixed to radiator
tightly
Replace the IPM
The unit does not work normally
Replace the compressor
E5 & E6
Replace the outdoor or
indoor PCB
P0: