Power Module Check - Daikin FLXS-BAVMB Service Manual

Check
5.9

Power Module Check

Check No.13
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
109
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
SiBE05-722_B
DB1 (–)
UVW DB1 (–)
0 Ω or ∞
Service Diagnosis
UVW