Check The Ipm Module Method - Haier AS12GB3HRA Service Manual

Turn off the power. check if the
compressor wiring connected ok or not
Check the IPM module
Test the resistance values among
phases U, V and W of compressor, is
the resistance is about 1 ?
Check the installation condition
Disconnect the compressor harness connector from the outdoor unit PCB.
To disengage the connector, press the protrusion on the connector.
Then, measure resistance between P (+) and N (-) and the U, V and W terminals of the compressor
connector with a multi-tester. Evaluate the measurement results for a pass/fail judgment.
N(-)terminal of tester(P(+)for digital tester)
P(+)terminal of tester(N(-)for digital tester)
Normal resistance
Unacceptable resistance
YES
YES
YES
NO
Reconnect the wiring
NO
Change the IPM
Replace the
compressor
P(+) UVW
UVW P(+)
Short (0 or open
42
Service diagnosis
P(-) UVW
UVW P(-)
Domestic air conditioner