Power Module Check - Daikin 2MXS40H2V1B Service Manual

Check

8.15 Power Module Check

Check No.22
Note: Check to make sure that the voltage between (+) and (–) of the power module (IPM1) is approx.
0 V before checking.
Negative (–) terminal of
tester (positive terminal
(+) for digital tester)
Positive (+) terminal of
tester (negative terminal
(–) for digital tester)
Resistance is OK.
Resistance is NG.
217
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 multi-tester. Evaluate the measurement
results for a judgment.
Power module
The illustration is for 50 class model as representative.
UVW
(+)
UVW Power module
(+)
several kΩ ~ several MΩ
SiBE121123_A
Power module
(–)
UVW Power module
0 Ω or ∞
Power module
(R18388)
Service Diagnosis
UVW
(–)