Power Module Check - Daikin FTKM-U Series Service Manual

SiMX042215E

5.12 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 (+) or (–) terminal of the
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
 12 class
Part 6 Service Diagnosis
connector, press the protrusion on the connector.
power module and the U, V, or W terminal of the compressor with a multimeter. Evaluate the
measurement results referring to the following table.
Power module
Pin 23: –
UVW
(+)
Power module
UVW
(+)
several k ~ several M
Pin 24: W Pin 26: U
Pin 25: V
Power module
(–)
Power module
UVW
0  or 
Pin 27: +
Check
UVW
(–)
R6000752
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