Service diagnosis
#$#!#.
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(+) UVW P(-) UVW
P(+)terminal of tester(N(-)for digital tester) UVW P(+) UVW P(-)
Normal resistance Several kΩ to several MΩ ()
Unacceptable resistance Short (0 Ω) or open
Domestic air conditioner
Turn off the power. check if the
compressor wiring connected ok or not
Reconnect the wiring
NO
YES
Check the IPM module
NO
Change the IPM
YES
Test the resistance values among
phases U, V and W of compressor, is
the resistance is about 1Ω?
YES
Check the installation condition
Replace the
compressor
To Next Page
Loading...
Need help?
General
