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Hitachi RAS-20CNHZ2 - Page 99

Hitachi RAS-20CNHZ2
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– 107 –
TROUBLESHOOTING OF THE SYSTEM POWER MODULE
BASE
Collector
Emitter
+
—
PGU PGV PGW
NGU NGV NGW
UVW
+ —
P1 P2 UN1
L2L1
Element circuit
Circuit diagram
of the module
Terminal symbol of
system module
See next page
for values
measured by
tester
Do not disassemble the system power module when troubleshooting is performed.

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