Power Module Check - Daikin RXL-W Series Service Manual

Check

8.13 Power Module Check

Check No.22
Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before
checking.
 Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the
 Follow the procedure below to measure resistance between the terminals of the power module
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
09 class
201
connector, press the protrusion on the connector.
and the terminals of the compressor with a multimeter. Evaluate the measurement results
referring to the following table.
Power module
Pin 24: +
Pin 23: U
Pin 22: V
Pin 21: W
Pin 20: –
UVW
(+)
Power module
UVW
(+)
several k ~ several M
0  or 
SiUS092231E
Power module
UVW
(–)
Power module
UVW
(–)
(R20703)
Part 6 Service Diagnosis