Power Module Check - Daikin FTX-N Series Service Manual

SiUS091601EA

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
Part 6 Service Diagnosis
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 
Power module
UVW
(–)
Power module
UVW
(–)
Check
(R20703)
194