Gree Ultra Heat GMV-V72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual MAINTENANCE
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b. Drive board 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.
PFC board 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 L1, L2 and L3 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 L1, L2 and L3 respectively and record readings of the multi-meter.
c. Analyzing: 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.
Drive board