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Check
SiBE05-722ED
109
Service Diagnosis
5.13 Power Module Check
Check No.22
Note:
Check to make sure that the voltage between (+) and (–) of the power module or the diode
bridge is approximately 0 V before checking.
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 (+) or (–) terminal of the
power module or the diode bridge, and the U, V, or W terminal of the compressor with a
multimeter. Evaluate the measurement results referring to the following table.
RK(X)S25/35E2V1B
Negative (–) terminal of multimeter
(positive terminal (+) for digital
multimeter)
Power module (+)
or
Diode
bridge (+)
UVW
Power module
(–)
or
Diode
bridge (–)
UVW
Positive (+) terminal of multimeter
(negative terminal (–) for digital
multimeter)
UVW
Power module (+)
or
Diode
bridge (+)
UVW
Power module
(–)
or
Diode
bridge (–)
Resistance is OK.
several k
Ω
~ several M
Ω
Resistance is NG.
0
Ω
or
∞
(R19945)
Diode bridge