Generac Power Systems NP-40G User Manual
Page 25
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Section 1.5- COMPONENTS TESTING
TESTING THE CIRCUIT BOARD;
There Is no practical way of testing the CCG
circuit board In the field. Read "SYMPTOMS OF
CIRCUIT BOARD FAILURE" carefully. Test the Sta
tor, the Genistor, and the Battery Charge circuit as
outlined In this Section. Also perform a resistance
test of the Stepper Motor (see Part 7, "THE VARI
ABLE SPEED SYSTEM") and observe Its operation
If possible.
Inspect wiring and wiring connections between
the CCG circuit board and the Genistor as follows
(refer to appropriate wiring diagram):
1. Check wires G1 through G4 (and Wire 22) for
proper connections at circuit board and at the
Genistor.
2. Use a VOM to check Wires G1 through G4 (and
Wire 22) for continuity.
3. Check Wires AC1, AC2, SL1 and SL2 (between
circuit board and Genistor) for proper connections.
4. Use a VOM to check Wires AC1, AC2, SL1, SL2
(between circuit board and Genistor) for condlnu-
Ity.
If all tests are completed and no problem Is found
on other components of the system, replace the
CCG circuit board and check unit operation.
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