ESIE09-08B Method of Replacing the Inverter’s Power Transistors Modules
Appendix 243
6. Method of Replacing the Inverter’s Power
Transistors Modules
Warning: CAPACITOR SHOCK HAZARD. The capacitors (top surfaces) can hold up to
220V. Use correct precautions when servicing.
Checking failures in power semiconductors mounted on inverter PC board
Check the power s
emiconductors mounted on the inverter PC board by the use of a multiple
tes
ter.
<Items to be prepared>
Multiple tester : Prepare the digital type of multiple tester with diode check function.
<Preparation>
Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement
of resistance.
To make measurement, disconnect all connectors and terminals.
Inverter PC board
W
V
U
C+
C-
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