Section 5 — Troubleshooting

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)

5.Valve lash out of adjustment.

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

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 10-12"

 

 

 

 

water column (0.36-0.43 psi) for

 

 

 

 

LP, and 5-7” water colum (0.18-

 

 

 

 

0.25 psi) for natural gas.

 

 

 

 

 

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 2.1)

 

 

*Contact the nearest Authorized Dealer for assistance.

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Generac 04675-3, 04673-2, 04674-2 owner manual Troubleshooting Guide, Problem Cause Correction
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04674-2, 04675-3, 04673-2 specifications

Generac, a prominent name in the power equipment sector, offers a range of reliable and efficient energy solutions, including the models Generac 04673-2, 04675-3, and 04674-2. These models are designed to meet diverse consumer needs, from residential applications to larger commercial setups, providing dependable backup power during outages.

The Generac 04673-2 is a standout home standby generator specifically engineered for residential use. It boasts an automatic operation feature, ensuring that power is restored within seconds of an outage. This model operates on a robust Generac engine, delivering a reliable power output that can support essential household appliances and systems, including HVAC units, refrigerators, and sump pumps. One of the main characteristics of this generator is its Quiet Test mode, which runs at a lower RPM to minimize noise while conducting weekly self-tests, ensuring that the system is always ready when needed.

Moving on to the Generac 04675-3, this model offers enhanced features tailored for users needing higher power output. With a larger capacity, it can handle more demanding power needs, making it suitable for larger homes or small businesses. The 04675-3 is equipped with advanced technologies, including the Mobile Link™ remote monitoring system, which enables users to check the status and performance of their generator from anywhere using a smartphone or computer. This connectivity empowers users with real-time information and alerts regarding their generator's operational performance.

The Generac 04674-2 model rounds out the trio, engineered for those who need a powerful standby generator with a slightly different configuration. It features the same robust engine as the other models, ensuring reliability and user-friendly operation. Its standout feature is the integrated transfer switch capability, which allows for seamless transfer of power from the grid to the generator without manual intervention. This model also supports various fuel types, providing flexibility depending on user preference and availability.

All three Generac models focus on safety and efficiency, incorporating features such as excellent ventilation systems, all-weather enclosures, and user-friendly control panels. They are designed for low maintenance, ensuring long-lasting performance without extensive upkeep. With Generac's commitment to innovation and quality, these generators offer peace of mind, enabling users to maintain their lifestyles and operations without interruption during power outages. Whether for home or business use, the Generac 04673-2, 04675-3, and 04674-2 models represent a reliable choice in emergency power solutions.
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