Generac 40kW LP, 37kW NG owner manual Troubleshooting Points, Problem Cause Correction

Page 24

Section 5 — Troubleshooting

QUIETSOURCE™ 40kW Liquid-cooled Generators

TROUBLESHOOTING POINTS

PROBLEM

CAUSE

CORRECTION

Engine won’t crank.

1.

15-amp fuse blown.

1.

Replace fuse.

 

2.

Loose or corroded or defective

2.

Tighten, clean or replace

 

 

battery cables.

 

battery cables as necessary.

 

3.

Defective starter contactor.

3.

Replace contactor.

 

4.

Defective starter motor.

4.

Replace starter motor.

 

5.

Dead or Defective Battery.

5.

Remove, change or replace battery.

 

6.

4-amp fuse blown.

6.

Replace fuse.

 

 

 

 

 

Engine cranks, but won't start

1.

Out of fuel.

1.

Replenish fuel.

 

2.

Fuel solenoid (FS) is defective

2.

Replace solenoid.

 

3.

Open Wire #14 from Engine Control

3.

Reconnect wire.

 

 

circuit board.

 

 

 

4.

Spark plugs defective.

4.

Clean, regap or replace plugs.

 

 

 

 

 

Engine starts hard, runs rough.

1.

Air cleaner plugged or damaged.

1.

Clean or replace as needed.

 

2.

Plugged fuel line.

2.

Unclog fuel line.

 

3.

Defective spark plugs.

3.

Clean, regap or replace plugs.

 

 

 

 

 

Engine starts, then shuts down.

1.

Engine oil level is low.

1.

Check oil and add oil as needed.

 

2.

Engine is overheated.

2.

Check cooling system for leaks.

 

3.

Defective Low Oil Pressure Switch

3.

Replace switch.

 

4.

Defective Coolant Temperature Switch

4.

Replace switch.

 

5.

Defective Control Module circuit board.

5.

Replace board.

 

6.

Coolant Level is Low.

6.

Repair leak - Add coolant.

 

7.

Defective Low Coolant Level Switch

7.

Replace Switch.

 

 

 

 

 

AUTO/OFF/MANUAL Switch at

1.

Defective AUTO/OFF/MANUAL switch

1.

Replace switch.

OFF, engine continues to run

2.

Open/disconnected wire #15A between

2.

Reconnect/close wire.

 

 

AUTO/OFF/MANUAL switch and Control

 

 

 

 

Module circuit board.

 

 

 

3.

Defective Control Module circuit board

3.

Replace board.

 

 

 

 

 

No AC output from generator.

1.

Check main line circuit breaker.

1.

Reset to ON or CLOSED.

 

2.

Check circuit breaker & fuses.

2.

Reset and replace, if necessary.

 

3.

Transfer switch set to NORMAL position

3.

Set to GENERATOR position.

 

4.

Generator internal failure.

4.

Contact an Authorized Generac

 

 

 

 

facility.

 

5.

Thermal circuit breaker open.

5.

Auto-reset - Wait 5 min. and

 

 

 

 

attempt restart.

22 Generac® Power Systems, Inc.

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Contents Liquid-cooled, Prepackaged Standby Generators Authorized Service Dealer Location ‹ Operation and Maintenance‹ HOW to Obtain Service IntroductionTable of Contents General Hazards Electrical Hazards Transfer Switch GeneratorAutomatic System Operation Generator AC Connection Systems‹ 1.7.1 LOW OIL Pressure Switch ‹ 1.7.2 High Coolant Temperature Switch‹ 1.7.3 LOW Coolant Level Switch Generator Fuel SystemUnpacking Lifting the GeneratorSpecifications Reconfiguring the Fuel System‹ 1.10.1 Generator Specifications ‹ 1.10.2 Engine SpecificationsTorque Specifications Before InstallationEngine OIL Recommendations Coolant RecommendationsGenerator Location Generator Mounting SupportBasic Standby Electric System ‹ 2.1.1 Nfpa StandardsTransfer Switch Signal Connections Emergency Circuit Isolation MethodTotal Circuit Isolation Method Generator AC Neutral ConnectionsBattery Installation ‹ 2.9.2 GTS-TYPE Engineered Transfer Switch‹ 2.10.1 Vented Batteries Using AN Engineered GTS Transfer Switch Preparation Before START-UP‹ 3.2.1 AUTO/OFF/MANUAL Switch ‹ 3.2.2 Fault Indicator LED‹ 3.2.5 SET Exercise Time Switch Control Console ComponentsManual Transfer START-UP Engine Governor Adjustments Retransfer and ShutdownAutomatic Operation Weekly Exercise CycleCooling System Overload Protection for Engine DC Electrical SystemChecking Fluid Levels ‹ 4.5.11 Changing the Engine AIR Cleaner ‹ 4.5.10 Changing Engine OIL‹ 4.5.12 Spark Plugs ‹ 4.5.13 Coolant ChangeMiscellaneous Maintenance ‹ 4.6.1 Cleaning the Generator‹ 4.6.2 Battery ‹ 4.6.4 Battery ReplacementScheduled Maintenance Service Maintenance Interval InformationLevel Maintenance Level Troubleshooting Points Problem Cause CorrectionInstallation Diagram Electrical Data Electrical Data Electrical Data Electrical Data Carrier Rear Bearing Assy Wire Hold Down BatteryBoot Battery Cable Battery Post Covwer BlackSee Latch Detail Assy GRD Wire 99HSB ASSEMBLY,BASE-DOOR Ground WireDuct Intake MID AL Duct Discharge RH ALGenerac Power Systems, Inc Assy 2A 12V UL Battery Control BOX HSBCover Front Panel HSB Cover TOP Panel HSB ShockGenerac Power Systems, Inc Cover Flywheel Access Assembly ResistorFlexplate 3.9L HSB SunkPump Tank Coolant Recovery Radiator Copper BrassVENTURI,3.9L Cryslr HSB 22FAN Radiator Support L/H SideTo Engine Base AIR Cleaner Plate Hold Down AIR CleanerPlate AIR Cleaner TOP Flange Fuel InletLeads Rotor 390 30KW 1P Direct HSB Rotor 390 40KW 1P Direct HSBSTR-390--40AD HSB 433MM LONG3.9L Chrysler Rear Bearing Carrier 390/DRCTOUT WYE, Pipe 3.9L ChryslerNUT TOP Lock FL M12-1.75 Pipe L/H Exhaust ManifoldQuietsource 40kW Liquid-cooled Generators Quietsource 40kW Liquid-cooled Generators Quietsource 40kW Liquid-cooled Generators This Warranty Shall not Apply to the Following
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