Service Manual

Check SiUS091133
153 Service Diagnosis
5.15 Power Module Check
Check No.22
Note: Check to make sure that the voltage between (+) and (–) of the power module is approx. 0 V before
checking.
 Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the
connector, press the protrusion on the connector.
 Follow the procedure below to measure resistance between the terminals of the power module
and the terminals of the compressor with a multi-tester. Evaluate the measurement results
referring to the following table.
09/12 class
Negative (–) terminal of
tester (positive terminal
(+) for digital tester)
Power module
(+)
UVW Power module
(–)
UVW
Positive (+) terminal of
tester (negative terminal
(–) for digital tester)
UVW Power module
(+)
UVW Power module
(–)
Resistance is OK. several k ~ several M
Resistance is NG. 0  or 
(R16069)
Power module