Troubleshooting - Generac Power Systems GEN27WN Operator's Manual

Liquid-cooled residential generator system
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Troubleshooting

Problem
Engine is running, but no AC
output is available.
Engine runs good at no-load but
"bogs down" when loads are
connected.
Engine will not start; or starts
and runs rough.
Engine shuts down during
operation.
Loss of power on essential
circuits.
22
Cause
1.
Circuit breaker open or defective.
2.
Fault in generator control panel.
3.
Poor wiring connections or
defective transfer switch.
1.
Short circuit in a connected load.
2.
Generator is overloaded.
3.
Shorted generator circuit.
4.
Fuel pressure or mixture is
incorrect.
5.
Kinked fuel line.
1.
15 Amp fuse missing or blown.
2.
Fuel supply turned off or depleted.
3.
Failed battery.
4.
Fuel pressure is incorrect
1.
Fuel supply turned off or depleted.
2.
Fault indicator blinking.
1.
Generator circuit breaker is open.
2.
Transfer switch problems.
Correction
1. Reset or replace circuit breaker.
2.
Contact local service facility.
3.
Check and repair.
1. Disconnect shorted electrical load.
2.
See Essential Circuits.
3.
Contact local service facility.
4.
See Gaseous Fuel System in the
Installation Manual.
5.
Remove kink. Replace if necessary.
1. Install (new) 15 Amp fuse. See
System Control Panel.
2.
Open fuel valve(s); check propane
tank.
3.
Replace battery.
4.
See Gaseous Fuel System in the
Installation Manual.
1.
Check fuel valves, fill propane tank.
2.
Count blinks and refer to Fault
Detection System.
1. Reset circuit breaker.
2. See the transfer switch manual.

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