Heat Controller A-VMH27TC-1, A-VMH18DC-1 High PFC module protection ODU P6 Only for A-VMH36QC-1

Heat Controller, Inc. VMH Series Service Manual

9.3.2.11 High PFC module protection (ODU P6) (Only for A-VMH36QC-1)

PFC module protecton
Check whether the connecting line		Connect it tightly,
between main board and the PFC	No
		check normal or not
module is connected tightly
Yes
	No

Check whether the voltage range
of P-N on IPM module is normal?
		Yes	Replace the outdoor main board
DC277-356V for 18-27KBtu/h;
DC277-410V for 36KBtu/h
	No
Check whether the inductance
of PFC module is good? If the			Replace the inductance
		No
inductance is good, the resistance of
the two ports is 0

Yes

Replace the PFC module

9.3.2.12 Inverter compressor drive protection (ODU P7)

The trouble shooting is same process as the IPM module protection, trouble shooting.

Refer to this section.

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