ESIE09-08A Method of Replacing the Inverter’s Power Transistors Modules
Appendix 257
Power module checking
When using the digital type of multiple tester, make measurement in diode check mode.
*There needs to be none of each value variation.
The following abnormalities are also doubted besides the PC board abnormality.
Faulty compressor (ground fault, ground leakage)
Faulty fan motor (ground leakage)
Tester terminal Criterion Remark
+ -
C+ U Not less than 0.3V
(including )*
It may take time to
determine the voltage
due to capacitor
charge or else.
V
W
U C- Not less than 0.3V
(including )*
V
W
U C+ 0.3 to 0.7V
(including )*
V
W
C- U 0.3 to 0.7V
(including )*
V
W
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