Hitachi FSG Series Service Manual page 99

n Checking Procedures Transistor Module
Outer Appearance and Internal Circuit of Transistor Module
[Case1]
[Case2]
Remove all the terminals of the transistor module before
check.
If items (a) to (e) are performed and the results are
satisfactory, the transistor module is normal.
Measure it under 1 kW range of a tester. Do not use a digital
tester.
a. By touching the + side of the tester to the P terminal of
transistor module and the - side of tester to U, V and W
of transistor module, measure the resistance. If all the
resistances are from 1 to 5 kW, it is normal.
b. By touching the - side of the tester to the P terminal of
transistor module and the + side of tester to U, V and W
of transistor module, measure the resistance. If all the
resistances are greater than 100 kW, it is normal.
TROUBLESHOOTING
a)
b)
1
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