Generac Power Systems 04759-0, 04758-0, 04760-0 Troubleshooting Guide, Problem Cause Correction

Page 25

Section 5 — Troubleshooting

Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators

5.1TROUBLESHOOTING GUIDE

PROBLEM

CAUSE

CORRECTION

The engine will not crank.

1.

Fuse blown

1.

Replace 15A fuse on generator

 

 

 

 

control panel.

 

2.

Loose, corroded or defective

2.

Tighten, clean or replace

 

 

battery cables

 

as necessary.

 

3.

Defective starter contactor (7 kW) 3.

*

 

4.

Defective starter motor

4.

*

 

5.

Dead Battery

5.

Charge or replace battery.

 

 

 

 

 

The engine cranks but

1.

Out of fuel

1.

Replenish fuel.

will not start.

2.

Defective fuel solenoid (FS)

2.

*

 

3.

Open #14 wire from

3.

*

 

 

engine control board

 

 

 

4.

Defective spark plug(s)

4.

Clean, re-gap or replace plug(s).

 

5.

Valve lash out of adjustment.

5.

Reset valve lash.

 

 

 

 

 

The engine starts hard

1.

Air cleaner

1.

Check, replace air cleaner.

and runs rough.

 

plugged or damaged

 

 

 

2.

Defective spark plug(s)

2.

Clean, re-gap or replace plug(s).

 

3.

Fuel regulator not set.

3.

Set fuel regulator.

 

4.

Fuel pressure incorrect.

4.

Confirm fuel pressure is at 11”-14”

 

 

 

 

water column (0.4 psi - 0.5 psi).

 

 

 

 

 

The Auto/Off/Manual switch

1.

Defective switch

1.

*

is set to OFF, but the engine

2.

Auto/Off/Manual switch

2.

*

continues to run.

 

wired incorrectly

 

 

 

3.

Defective control board

3.

*

 

 

 

 

 

There is no AC output from

1.

Main line circuit breaker open

1.

Reset circuit breaker

the generator.

 

 

 

to ON (or closed).

 

2.

Generator internal failure

2.

*

 

 

 

 

 

There is no transfer to

1.

Defective transfer switch coil

1.

*

standby after utility

2.

Defective transfer relay

2.

*

source failure.

3.

Transfer relay circuit open

3.

*

 

4.

Defective control logic board

4.

*

 

 

 

 

 

Unit consumes large

1.

Break-in procedure

1.

*

amounts of oil.

 

not followed (see Section 3.1)

 

 

*Contact your nearest Generac Authorized Dealer for assistance.

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Contents Installation Introduction Maintenance Post Installation Start-up AdjustmentsTroubleshooting Introduction Inside Front CoverGeneral Hazards ‹ Standards Index Electrical HazardsProtection Systems UNPACKING/INSPECTIONSystem SET LED 7 kW, Single Cylinder GH-410 Engine Your Generator‹ 1.5.1 Generator Specifications‹ 1.5.2 Engine Fuel Requirements Recommendations Reconfiguring the Fuel SystemFuel Consumption 2 12KW and 15KW, 990CC EnginesLocation Transfer SwitchGenerator 2.1 7 kW, 12 kW and 15 kW UnitsBattery Battery InstallationBefore Initial START-UP Check Transfer Switch OperationElectrical Checks Checking Automatic Operation Generator Tests Under LoadEngine Governor Adjustment Adjusting the Regulator Natural GAS only1 7 KW Units BREAK-IN Procedure Voltage Regulator Adjustment2 12 KW and 15 KW Units Sequence of Automatic Operation Automatic Transfer Operation‹ 3.2.1 Auto Position ‹ 3.2.2 OFF PositionManual Transfer Operation ‹ 3.5.2 Transfer Back to Utility Power Source‹ 3.7.1 LOW OIL Pressure Switch Setting the Exercise Timer‹ 3.7.2 High Temperature Switch ‹ 3.7.3 OvercrankChanging the Engine OIL Checking the Engine OIL Level‹ 4.3.1 Engine OIL Recommendations Changing the OIL Filter ‹ 4.3.2 OIL Change Procedure‹ 4.5.1 7 KW, 12 KW and 15 KW Generators Spark Plugs Battery MaintenanceCooling System Adjusting Valve Clearance‹ 4.12.2 Return to Service OUT of Service Procedure‹ 4.12.1 Removal from Service Corrosion ProtectionBe performed by your nearest Generac Authorized Dealer Service ScheduleProblem Cause Correction Troubleshooting GuideElectrical Data Customer Connection SM Starter Motor 1VA Engine Wiring Control Panel BOX SP Spark Plug Customer Connections Exploded Views and Parts Lists Part NO. QTY Description Exploded Views and Parts Lists Part NO. QTY. Description Kit Contains QTY Description 122 138 125 139 136 135 123 120 137 124 133 119 117 114 121 QTY Description 45 30 ADAPTOR, Engine Exploded Views and Parts Lists Stator 12KW 40 22 ASSEMBLY, Connecting ROD Exploded Views and Parts Lists SCREW, Taptite M6-1.0X8 Yellow Chrome For GT 760 Engine only CASTING, Twin Regulator Housing Mounting Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators California and Federal Emission Control Warranty Statement Emission Control System Warranty This Warranty Shall not Apply to the Following Warranty Schedule

04760-0, 04759-0, 04758-0 specifications

Generac Power Systems is a leading manufacturer in the field of power generation, known for its innovative products that cater to both residential and commercial customers. Among its prominent offerings, the Generac models 04758-0, 04759-0, and 04760-0 stand out as essential solutions for backup energy needs. These units offer reliable power during outages, ensuring that homes and businesses remain operational regardless of external conditions.

The Generac 04758-0 is a robust standby generator designed for residential use. Featuring a powerful engine, it delivers a dependable power output when it is needed most. Key characteristics include an automatic transfer switch that detects power loss and activates the generator without user intervention. This means that homeowners can enjoy peace of mind knowing that their essential appliances and systems will continue to function seamlessly during outages. Additionally, its compact design allows for easy installation in most home settings.

Moving on to the Generac 04759-0, this model offers even greater power capacity, making it suitable for larger homes or small businesses. It incorporates advanced technologies such as digital power management, which optimizes fuel efficiency and reduces emissions. The O47-59-0 is also known for its durable construction, providing reliable performance in various weather conditions. Its user-friendly interface allows for straightforward operation and monitoring, ensuring users remain informed about their power status.

The Generac 04760-0 takes it a step further by enhancing its overall performance with innovations in noise reduction and fuel consumption. It is engineered with a leading-edge cooling system that minimizes operational noise, making it ideal for residential neighborhoods where sound regulations are a concern. This model is also compatible with a variety of fuels, giving users flexibility based on availability and cost. Its comprehensive warranty further underscores Generac's commitment to customer satisfaction and product reliability.

In summary, the Generac Power Systems models 04758-0, 04759-0, and 04760-0 exemplify technology and engineering excellence in the power generation industry. With features designed for efficiency, durability, and user convenience, these models provide steadfast support to users seeking dependable backup power solutions. Whether for a home or small business, Generac's offerings remain a trusted choice for managing unexpected power outages.
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