Daikin ARX20K2V1B, Service Manual, Page: 99 / 114

SiBE041525F Check
Service Diagnosis 88
50/60/71 class
5.13 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
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 multimeter. Evaluate the measurement
results referring to the following table.
(R20701)
1
2
3
4
Multimeter
–~
~
+
–
+
Positive terminal (+) of
digital multimeter
Power module
(+)
UVW Power module
(–)
UVW
Negative terminal (–) of
digital multimeter
UVW Power module
(+)
UVW Power module
(–)
Resistance is OK. several k Ω ~ several M Ω
Resistance is NG. 0
Ω
or ∞