Power Module Check - Daikin 2MKS40G2V1B Service Manual

Check

8.14 Power Module Check

Check No.22
Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) 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 in OK
Resistance in NG
271
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 DB1 and
the terminals of the compressor with a multi-tester. Evaluate the measurement results for a
judgment.
DB1 (+) UVW
UVW DB1 (+)
several kΩ ~ several MΩ
SiBE12-816_D
DB1 (–)
UVW
0 Ω or ∞
Service Diagnosis
UVW
DB1 (–)