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Section 4 — Troubleshooting
Portable Generator System
4.1 TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
CORRECTIVE ACTION
Engine won't start.
1. No fuel in tank.
2. Fuel valve turned off.
3. Defective spark plug.
4. Plugged fuel filter.
5. Defective or stuck engine stop switch.
1. Add fuel to tank.
2. Turn fuel valve on.
3. Replace spark plug.
4. Replace fuel filter.
5. Replace engine start switch.
Engine starts, then shuts down.
1. Low fuel level.
2. Fuel tank vent closed.
3. Low engine oil level.
4. Contaminated fuel.
5. Defective low oil level switch.
6. Defective ignition coil.
1. Add fuel to tank.
2. Open fuel tank vent.
3. Check engine oil level, add as needed.
4. Replace fuel filter.
5. Replace engine start switch.
6. Replace ignition coil.
Engine starts, then runs rough.
1. Choke is stuck or left on.
2. Dirty or clogged air filter.
3. Defective spark plug.
4. Dirty fuel filter.
5. Defective FlexPower switch.
1. Turn choke off.
2. Clean or replace the air filter element.
3. Replace spark plug.
4. Replace fuel filter.
5. Replace FlexPower switch.
No AC output.
1. Generator is overloaded (LED is on).
2. Defective inverter assembly.
1. Reduce the load to the generator and restart.
2. Replace inverter assembly.
No DC output.
1. DC circuit breaker is open.
2. Defective DC circuit breaker.
3. Defective rectifier.
1. Reset DC circuit breaker.
2. Replace DC circuit breaker.
3. Replace rectifier.
* Engine speed increases and decreases — This is normal as the generator starts up and as loads vary.
