Generac Power Systems NP-40G - Manual (Page 25)

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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