Method of Replacing The Inverter’s Power Transistors Modules SiEN18-622
410 Troubleshooting
11.Method of Replacing The Inverter’s Power
Transistors Modules
Checking failures in power semiconductors mounted on inverter PCB
Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester.
<Items to be prepared>
1 Multiple tester : Prepare the digital type of multiple tester with diode check function.
<Preparation>
1 Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement
of resistance.
1 To make measurement, disconnect all connectors and terminals.
Inverter PCB
C-
C+
W
V
U
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