Generac QT owner manual Troubleshooting Guide, Problem Cause Correction

Page 23

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

1.

Clean or replace as needed.

 

 

damaged.

 

 

 

2.

Plugged fuel line.

2.

Unclog fuel line.

 

3.

Defective spark plugs.

3.

Clean, regap or replace plugs.

 

4.

Fuel pressure incorrect.

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 Authorized Dealer for assistance.

12-1

08/05

0 .Rev Trblsht001

Page 22 Page 24
Image 23
Page 22 Page 24
Contents QT 1.5L 20kW Models Standby Generator Sets Table of Contents  Warning   Electrical Hazards  Introduction ‹ Operation and Maintenance‹ HOW to Obtain Service Authorized Service Dealer Location‹ Data Label Identification RecordCoolant Recommendations Equipment DescriptionEngine OIL Recommendations Engine Protective Devices ‹ LP Fuel System Fuel System‹ Fuel Requirements ‹ Natural GAS Fuel SystemSpecifications ‹ Cold Weather KIT ‹ Reconfiguring the Fuel SystemGenerator AC Lead Connections Alternator Power Winding Connections‹ FOUR-LEAD, SINGLE-PHASE Stator ‹ 3-PHASE AlternatorsInitial Inspection for QT Genset Startup InstallationPreparation Before START-UP ‹ START-UP Inspection START-UP Checklist‹ Preparation for START-UP ‹ Retransfer and Shutdown Operating Unit with Manual Transfer SwitchGenerator Control Operation ‹ Engine START-UP and TransferChecking Fluid Levels Cooling SystemMaintenance Owner Operator can Perform ‹ Spark Plugs ‹ Changing the Engine AIR Cleaner ‹ Coolant Change‹ Changing Engine OIL Miscellaneous Maintenance Service Maintenance Interval Information Service ScheduleLevel Maintenance Level Problem Cause Correction Troubleshooting GuideStandby Generator Sets Standby Generator Sets Standby Generator Sets Standby Generator Sets Page Breaker Tray BACK/BOTTOM Page Assy Rotor 20KW Page Encl HSB Control Panel Page Battery Tray C1 CPL Page Mounting Base 1.5L C1 CPL Page Support Radiator LH Side Page ASM Motor Stepper Page ENGINE-1.5L Page Elbow 90D 3/4 NPT Page Roof C1 CPL Page Muffler C1 Page Page Page Page Page Page Standby Generator Sets Warranty

QT specifications

Generac QT is a line of advanced, high-quality standby generators designed for residential and commercial use. These generators are engineered to provide reliable backup power in the event of a utility outage, ensuring that homes and businesses remain operational during unforeseen circumstances.

One of the main features of the Generac QT series is its powerful engine, designed to deliver robust performance. The generators typically come equipped with Generac’s G-Force engine, renowned for its durability and long life. This engine is built to run at a lower RPM compared to competitors, which not only reduces noise but also enhances the overall lifespan of the generator.

The QT series also boasts a self-test mode, allowing users to conduct routine checks to ensure the generator remains in optimal condition. This feature minimizes the risk of unexpected failures and ensures that the unit is always ready for action when needed. Additionally, the generators are equipped with a power management system that intelligently balances the load, ensuring that essential systems receive power during an outage.

Another standout characteristic of the Generac QT series is its Quiet-Test technology. This innovative feature allows the generator to run at a lower decibel level during routine testing, making it less intrusive in residential areas while still ensuring functionality. This aspect highlights Generac's commitment to creating products that are not only efficient but also considerate of the surrounding environment.

The Generac QT generators are also equipped with an advanced digital controller that provides real-time monitoring and diagnostics, making it easier for users to track performance and maintenance needs. This allows for prompt action in case any issues arise, further ensuring the reliability of the power supply.

User convenience is a priority for Generac, and the QT series reflects this with its easy-to-understand control panel. The intuitive design makes it simple for users to monitor generator status, adjust settings, and understand power usage. Furthermore, the generators can be integrated with home automation systems, providing an added layer of convenience and control.

Overall, the Generac QT series stands out for its powerful engine, advanced technologies, and user-friendly features. It is an excellent option for those looking to invest in a dependable standby generator that meets modern energy needs while maintaining efficiency and operating quietly. With its focus on quality and innovation, Generac continues to be a leader in the power generation industry.
Top Page Image Contents