GMV5 Home DC Inverter Multi VRF Units
300
Attachment: How to check whether the IPM module is damaged:
7) Preparation: Find a digital multi-meter and switch it to the diode. Remove U, V and W
cables of the compressor from the drive board two minutes after the system is
powered off. Make sure that it is tested at least two minutes after the system is
powered off.
8) Method: Use the black probe of the multi-meter to touch the place marked by P in the
follow picture and the red probe to touch places marked by U, V and W respectively
and record readings of the multi-meter. Use the red probe to touch the place marked
by N and black probe to touch places marked by U, V and W respectively and record
readings of the multi-meter.
9) Analysis: If the reading ranges between 0.3 V and 0.7 V in the above-mentioned six
scenarios, the IPM module is normal. If the reading is 0 in one or multiple scenarios,
the IPM module is damaged.
Inverter compressor drive board IPM module over-temperature fault (ODU fault code P8)
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