Generac 4451, 4582 owner manual Troubleshooting

Page 21

Section 4 — Troubleshooting

Commercial-Industrial-Residential Portable Generator System

4.1 TROUBLESHOOTING

SYMPTOM

CAUSE

SOLUTION

 

 

 

 

 

Engine is running, but no AC

1.

Circuit breaker is open.

1.

Reset circuit breaker.

output is available.

2.

Poor connection or defective cord set.

2.

Check and repair.

 

3.

Connected device is bad.

3.

Connect another device that is in

 

 

 

 

good condition.

 

4.

Fault in generator.

4.

Contact Authorized Service Facility.

 

 

 

 

 

Engine runs good but bogs

1.

Short circuit in a connected load.

1.

Disconnect shorted electrical load.

down when loads are connected.

2.

Generator is overloaded.

2.

See “Don’t Overload the Generator” on page 9.

 

3.

Engine speed is too slow.

3.

Contact Authorized Service Facility.

 

4.

Shorted generator circuit.

4.

Contact Authorized Service Facility.

 

 

 

 

 

Engine will not start; or starts

1.

Dirty air cleaner.

1.

Clean or replace air cleaner.

and runs rough.

2.

Out of gasoline.

2.

Fill fuel tank.

 

3.

Stale gasoline.

3.

Drain fuel tank and fill with fresh fuel.

 

4.

Spark plug wire not connected to

4.

Connect wire to spark plug.

 

 

spark plug.

 

 

 

5.

Bad spark plug.

5.

Replace spark plug.

 

6.

Water in gasoline.

6.

Drain fuel tank; fill with fresh fuel.

 

7.

Overchoking.

7.

Put choke knob to No Choke position.

 

8.

Low oil level.

8.

Fill crankcase to proper level.

 

9.

Excessive rich fuel mixture.

9.

Contact Authorized Service Facility.

 

10. Intake valve stuck open or closed.

10. Contact Authorized Service Facility.

 

11. Engine has lost compression.

11. Contact Authorized Service Facility.

 

 

 

 

 

Engine shuts down during

1.

Out of gasoline.

1.

Fill fuel tank.

operation.

2.

Low oil level.

2.

Fill crankcase to proper level.

 

3.

Fault in engine.

3.

Contact Authorized Service Facility.

 

 

 

 

 

Engine lacks power.

1.

Load is too high.

1.

See “Don’t Overload the Generator” on page 9.

 

2.

Dirty air filter.

2.

Replace air filter.

 

3.

Engine needs to be serviced.

3.

Contact Authorized Service Facility.

 

 

 

 

 

Engine “hunts” or falters.

1.

Choke is opened too soon.

1.

Move choke to halfway position until

 

 

 

 

engine runs smoothly.

 

2.

Carburetor is running too rich or too

2.

Contact Authorized Service Facility.

 

 

lean.

 

 

 

 

 

 

 

No Battery Charge DC output.

1.

Battery posts are corroded.

1.

Clean battery posts.

 

2.

Battery cable is bad.

2.

Replace cable.

 

3.

Battery is defective.

3.

Check battery condition; replace if

 

 

 

 

defective.

 

4.

Receptacle is bad.

4.

Contact Authorized Service Facility.

 

 

 

 

 

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Contents Owner’s Manual Safety Rules General Information Introduction General Hazards Important Safety InstructionsElectrical Hazards Explosion HazardsFire Hazards Accessory BOX AssemblyUnpacking Assembling the Wheel KITHandle Assembly Battery ConnectionKnow the Generator OperationCord Sets and Connection Plugs 1 AC, 20 AMP, Duplex Receptacle2 120V AC, 20 AMP, Gfci Receptacle Provided. This receptacle can not recharge 6 Volt batteries 5 12 Volt DC, 10 AMP ReceptacleConnecting Electrical Loads HOW to USE the GeneratorDON’T Overload the Generator Grounding the GeneratorWattage Reference Guide Before Starting the GeneratorAdding Engine OIL Adding Gasoline To Start the EngineCold Weather OPERATION/ DE-ICER Automatic Idle ControlLOW OIL Pressure Shutdown System Stopping the EngineTo recharge 12 Volt batteries, proceed as follows Charging a BatteryProduct Specifications Maintenance ScheduleGenerator Specifications Engine SpecificationsGeneral Recommendations Service AIR Cleaner Clean Spark Arrestor ScreenReplacing the Spark Plug To adjust valve clearance Adjusting Valve ClearanceStorage General Long Term StorageOther Storage Tips Troubleshooting Commercial-Industrial-Residential Portable Generator System Commercial-Industrial-Residential Portable Generator System Wiring Diagram Drawing No E0228 Schematic Drawing No E0229-A GT-990 & GT-760 Engine Page 1 Drawing No E8589E Item Part NO. QTY. Description GT-990 & GT-760 Engine Page 2 Drawing No E8589E QTY Description Generator Drawing No D4488-D QTY. Description Control Panel Drawing No E0227B Part NO. QTY. Description Frame, Handle & Wheel Kit Drawing No E0695-A QTY Description California Emission Control Warranty Statement Emission Control System Warranty Warranty Schedule Generac Power SYSTEMS, INC. P.O. Box 297 Whitewater, WI