PRODUCT INFORMATION BULLETIN
for Control Board # 0830890SRV
SUBJECT:
C Option Engine Control PCB Adjustment Procedure
MODELS AFFECTED:
All generator sets utilizing a C Option control panel.
PROBLEM:
Overspeed and starter disengage calibration.
CORRECTIVE ACTION:
This adjustment must be done to ensure proper operation. The following
adjustment is for setting the engine OVERSPEED shutdown function. This
adjustment also serves as the starter disengage speed setpoint. If this adjust-
ment is not properly made it could cause damage to the engine or alternator
in an overspeed condition, or to the starter and ring gear if the starter does
not properly disengage.
1. Before starting the generator, turn COARSE adjustment pot full
CLOCKWISE, FINE pot COUNTER-CLOCKWISE.
2. Start engine, make sure engine is up to rated speed.
3. Turn COARSE pot slowly until red LED on PCB board turns on.
4. Turn FINE pot slowly until red LED goes out.
5. Turn FINE pot back slowly until red LED turns back on.
6. Verify proper overspeed shutdown by manually increasing engine speed
until engine shuts down. Verify that engine shutdown occurs at 72 Hz. If
not, slightly adjust FINE pot to achieve proper shutdown speed. This will
also ensure that the starter disengages at approximately 500 rpm.
Replaces PIB02-9-S
MORE DETAILED INSTRUCTIONS on the back page.
