Troubleshooting
6 TP-7088 6/17KohlerPower.com
TROUBLESHOOTING GUIDE
When troubles occur, be sure to check simple causes which, at fi rst, may seem too obvious to be considered. For
example, a starting problem could be caused by an empty fuel tank.
Some general common causes of generator troubles are listed below and vary by specifi cation. Use these to locate
causing factors.
Condition Possible Cause Solution
No AC output Circuit breaker in OFF position. Switch circuit breaker to ON.
Circuit protector popped out. Press circuit protectors.
Engine not operating at rated RPM. Adjust engine running at normal operating
temperature to 3750 ± 100 RPM.
Circuit breaker or receptacles faulty. Test for voltage at circuit breaker and
receptacles.
Stator is faulty. Test for voltage and resistance.
Brushes are faulty. Test for resistance between brushes and
slip ring.
AVR is faulty. Test for voltage.
Low voltage at stator Field polarity was lost. Flash rotor fi eld.
Alternator can't output
rated power
Engine not operating at rated RPM. Adjust engine running at normal operating
temperature to 3750 ± 100 RPM.
Overload condition. Calculate electrical power required by
electric appliances (in Watts). Reduce
total wattage of connected electric devices
within application range.
Appliance is faulty. Repair faulty appliance.
Tests
Stator voltage
Note: Make sure that auto idle feature is
turned off during the test.
Remove rear cover and start engine with
no load. Check if stator terminals have
correct voltage. The voltage from ground
to each winding is 120V and from winding
to winding is 240V. All values have ±10%
tolerance.
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