Appendix 1 – Troubleshooting

QUIETPACT™ 75D Recreational Vehicle Generator

TROUBLESHOOTING GUIDE

PROBLEM

CAUSE

CORRECTION

The engine will not crank.

1.

System control fuse blown

1.

Replace fuse.

 

2.

Loose corroded or defective

2.

Tighten, clean, or replace,

 

 

battery cables

 

as necessary.

 

3.

Defective engine Start/Stop

3.

Replace Start/Stop switch.

 

 

switch

 

 

 

4.

Defective starter contactor

4.

Replace contactor.

 

5.

Defective starter motor

5.

Replace starter motor.

 

6.

Low or defective battery

6.

Charge or replace battery.

 

7.

Defective engine control board

7.

Replace control board.

The engine cranks but

1.

Vehicle fuel shutoff valve closed

1.

Open valve, if so equipped.

will not start.

2.

Out of fuel

2.

Replenish fuel.

 

3.

Defective fuel solenoid (FS)

3.

Replace solenoid.

 

4.

Defective fuel pump (FP)

4.

Repair or replace fuel pump.

 

5.

Open #14 wire from

5.

Check connections and

 

 

engine control board

 

insulation of #14 wires.

 

6.

Plugged fuel filter or fuel line

6.

Clean or replace fuel filter or line.

 

7.

Engine mechanical parts failure

7.

Repair or replace parts.

 

8.

Defective engine control board

8.

Replace control board.

The engine starts hard

1.

Plugged or damaged

1.

Check, clean, or replace, as needed.

and runs rough.

 

air filter

 

 

 

2.

Defective fuel pump (FP)

2.

Repair or replace fuel pump.

 

3.

Plugged fuel filter or fuel line

3.

Clean or replace fuel filter or line.

 

4.

Water in fuel

4.

Drain fuel system and refill.

 

5.

Improper preheat

5.

Preheat unit.

The engine starts, but shuts

1.

Low engine oil level

1.

Check oil and add oil, as needed.

down when the Start/Stop

2.

Overheated engine

2.

Check cooling system for leaks.

switch is released.

3.

Defective Start/Stop Switch

3.

Disconnect Remote Harness

 

 

on panel or remote Start/Stop

 

Check/Replace Start/Stop Switch

 

4.

Defective low-oil

4.

Replace pressure switch.

 

 

pressure switch

 

 

 

5.

Defective high-coolant

5.

Replace temperature switch.

 

 

temperature switch

 

 

 

6.

No AC output

6.

Contact a Generac Authorized

 

 

 

 

Service Dealer

 

7.

Defective engine control board

7.

Replace control board.

The Start/Stop switch is

1.

Defective Start/Stop switch

1.

Replace switch.

set to Stop, but the engine

2.

Open/Disconnected #18 wire

2.

Reconnect or close wire.

continues to run.

 

between Start/Stop switch

 

 

 

 

and engine control board

 

 

 

3.

Open/Disconnected #0 wire

3.

Reconnect or close wire.

 

 

between Start/Stop switch

 

 

 

 

and engine control board

 

 

 

4.

Defective engine control board

4.

Replace control board.

There is no AC output from

1.

Main-line circuit breaker open

1.

Reset line breaker

the generator.

 

 

 

to ON (or closed).

 

2.

Fault with vehicle circuit

2.

Reset and replace, if necessary.

 

 

breaker and/or fuses

 

 

 

3.

Generator internal failure

3.

Contact a Generac Authorized

 

 

 

 

Service Dealer.

Generac® Power Systems, Inc. 37

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Guardian Technologies 004270-2 owner manual Troubleshooting Guide, Problem Cause Correction
Page 38 Page 40

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