Power Module Check - Daikin FTKN09NMVJU Service Manual

SiUS041501E
RXN18NMVJU, RK(X)18NMVJU, 24 class
Multimeter

5.13 Power Module Check

Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is approximately
0 V before checking.
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
Service Diagnosis
4
3
2
1
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.
Power module UVW
(+)
UVW Power module
(+)
several kΩ ~ several MΩ
Power module
(–)
UVW Power module
0 Ω or ∞
Check
(R20701)
UVW
(–)
100