Engine Troubleshooting - Generac 20 kW Synergy Guia De Instalacion

Troubleshooting
Section 8
8.1 — Engine Troubleshooting
Problem
Engine will not crank.
Engine cranks but will not
start.
Engine starts hard and runs
rough.
Generator is set to OFF, but
the engine continues to run.
No AC output from genera-
tor.
No transfer to standby after
utility source failure.
Unit consumes large
amounts of oil.
* Contact an Authorized Independent Service Dealer for assistance.
Installation Guidelines for Air-Cooled Generators
Table 8-1. Engine Diagnostics
Cause
1) Fuse blown.
2) Loose, corroded or defective battery
cables.
3) Defective starter contact.
4) Defective starter motor.
5) Dead Battery.
1) Out of fuel.
2) Defective fuel solenoid (FS).
3) Defective spark plug(s).
4) Valve clearance needs adjustment.
1) Air cleaner plugged or damaged.
2) Defective spark plug(s).
3) Fuel regulator not set.
4) Fuel pressure incorrect.
5) Fuel selector in wrong position.
1) Controller wired incorrectly.
2) Defective control board.
1) Main line circuit breaker is in the OFF
(or OPEN) position.
2) Generator internal failure.
1) Defective transfer switch coil.
2) Defective transfer relay.
3) Transfer relay circuit open.
4) Defective control logic board.
1) Engine over filled with oil.
2) Engine breather defective.
3) Improper type or viscosity of oil.
4) Damaged gasket, seal or hose.
Correction
1) Correct short circuit condition by
replacing 7.5 Amp fuse in generator
controller.
2) Tighten, clean or replace as necessary.*
3) Tighten, clean or replace as necessary.*
4) Tighten, clean or replace as necessary.*
5) Charge or replace battery.
1) Replenish fuel / Turn on fuel valve.
2) *
3) Clean, re-gap or replace plug(s).
4) Adjust valve clearance.
1) Check / replace air cleaner.
2) Clean, re-gap or replace plug(s).
3) Set fuel regulator.
4) Confirm fuel pressure to regulator is 10-
12" water column (19-22mm mercury)
for LP, and 3.5 - 7" water column (9-
13mm mercury) for natural gas.
5) Move selector to correct position.
1) Repair wiring or replace controller.*
2) Replace controller
1) Reset circuit breaker to ON (or
CLOSED).
2) *
1) *
2) *
3) *
4) *
1) Adjust oil to proper level.
2) *
3) See "Engine Oil Recommendations."
4) Check for oil leaks.
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