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Generac Power Systems 25, 20, 30 owner manual Troubleshooting Guide, Problem Cause Correction

Models: 25 30 20

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Standby Generator Sets

Troubleshooting

TROUBLESHOOTING GUIDE

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.

5 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 #14A from Engine Control

3.

Reconnect wire.

 

 

circuit board.

 

 

 

4.

Spark plugs defective.

4.

Clean, regap or replace plugs.

 

5.

Door on tank not closed.

5.

Close door on tank.

Engine starts hard, runs rough.

1.Flame arrestor (air cleaner) plugged or damaged.

2.Plugged fuel line.

3.Defective spark plugs.

4.Fuel pressure incorrect.

1.Clean or replace as needed.

2.Unclog fuel line.

3.Clean, regap or replace plugs.

4.Confirm fuel pressure to regulator is as recommended in SPECIFICATIONS.

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 OFF,

1.

Defective AUTO/OFF/MANUAL switch

1.

Replace switch.*

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.

*

 

5.

Thermal circuit breaker open.

5.

Auto-reset - Wait 5 min. and

 

 

 

 

attempt restart.

*Contact the nearest Dealer for assistance.

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Generac Power Systems 25, 20, 30 owner manual Troubleshooting Guide, Problem Cause Correction
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25, 30, 20 specifications

Generac Power Systems is a leading manufacturer of backup power generation products and tools, known for their reliability and innovation. Among their diverse lineup are the Generac 20kW, 25kW, and 30kW home standby generators. These models are designed to provide seamless power during an outage, allowing homeowners to maintain their everyday activities without interruption.

The Generac 20kW generator is particularly popular for residential use. It can power essential circuits as well as larger appliances, making it an ideal choice for homes with moderate electricity needs. One of its standout features is the Smart Management Module, which allows homeowners to manage energy consumption effectively, ensuring that they can run necessary appliances without overwhelming the system. Additionally, the 20kW generator is equipped with a durable enclosure, offering long-lasting protection against the elements.

Moving up in capacity, the Generac 25kW model caters to homes with higher electricity demands. This generator combines efficiency with strength, providing enough power for a wider range of home appliances and systems. It features a TruePower Technology that delivers clean power, crucial for sensitive electronics. Moreover, the 25kW model operates quietly, contributing to a comfortable home environment even during power outages.

The Generac 30kW generator is designed for larger homes or light commercial applications. It provides an impressive power output while maintaining high efficiency. Its features include advanced digital control, allowing for easy monitoring and maintenance. The 30kW model also offers an automatic transfer switch, which ensures that power is restored quickly and safely when utilities fail.

All three models utilize Generac's G-Force engine, known for its low maintenance requirements and high performance. They come with a five-year limited warranty, providing peace of mind for users. Furthermore, with Wi-Fi monitoring capabilities, homeowners can keep track of their generator's status from anywhere, ensuring they are always prepared for any power interruption.

In summary, the Generac 20kW, 25kW, and 30kW generators are excellent options for homeowners seeking reliable backup power. Their advanced features, durable construction, and efficient operation make them stand out in the market. Whether for essential home use or larger applications, Generac's lineup delivers dependable performance and innovative technology.