Generac Power Systems 004988-1 owner manual Troubleshooting Points, Problem Cause Correction

Page 24

Section 5 — Troubleshooting

Guardian Liquid-cooled 27 kW and 30 kW Generators

TROUBLESHOOTING POINTS

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.

4 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 #14 from Engine Control

3.

Reconnect wire.

 

 

circuit board.

 

 

 

4.

Spark plugs defective.

4.

Clean, regap or replace plugs.

 

 

 

 

 

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.

 

 

 

 

 

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,

1.

Defective AUTO/OFF/MANUAL switch

1.

Replace switch.

OFF 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.

Contact an Authorized Generac

 

 

 

 

facility.

 

5.

Thermal circuit breaker open.

5.

Auto-reset - Wait 5 min. and

 

 

 

 

attempt restart.

22 Generac® Power Systems, Inc.

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Page 23 Page 25
Contents Liquid-cooled, Prepackaged Standby Generators Authorized Service Dealer Location ‹ Operation and Maintenance‹ HOW to Obtain Service IntroductionTable of Contents General Hazards Electrical Hazards Transfer Switch GeneratorAutomatic System Operation Generator AC Connection Systems‹ 1.7.2 High Coolant Temperature Switch ‹ 1.7.1 LOW OIL Pressure Switch‹ 1.7.3 LOW Coolant Level Switch Engine Protective DevicesUnpacking Lifting the GeneratorSpecifications Reconfiguring the Fuel System‹ 1.10.1 Generator Specifications ‹ 1.10.2 Engine SpecificationsTorque Specifications Before InstallationEngine OIL Recommendations Coolant RecommendationsGenerator Mounting Support Basic Standby Electric SystemGenerator Location Emergency Circuit Isolation MethodTransfer Switch Signal Connections Total Circuit Isolation MethodGrounding the Generator Generator AC Neutral ConnectionsBattery Installation ‹ 2.11.2 Transfer SwitchPreparation Before START-UP ‹ 2.11.1 Prior to Initial START-UPUsing a Standard GTS Transfer Switch Control Console ComponentsManual Transfer START-UP Engine Governor Adjustments ‹ 3.2.2 Fault Indicator LED‹ 3.2.5 SET Exercise Time Switch ‹ 3.2.6 System Ready LEDWeekly Exercise Cycle Retransfer and ShutdownAutomatic Operation Overload Protection for Engine DC Electrical System Checking Fluid LevelsCooling System ‹ 4.5.2 Check Battery ‹ 4.4.3 Engine Coolant‹ 4.5.1 Check Engine OIL Level ‹ 4.5.3 Exercise SystemMiscellaneous Maintenance ‹ 4.5.11 Changing the Engine AIR Cleaner‹ 4.6.1 Cleaning the Generator ‹ 4.5.13 Coolant Change‹ 4.6.3 Battery Maintenance ‹ 4.6.4 Battery ReplacementScheduled Maintenance Service Maintenance Interval InformationLevel Maintenance Level Troubleshooting Points Problem Cause CorrectionInstallation Diagram Customer Connection PCB J2 ICT LOS WLS HCT Starter Carrier Bolt Boot Battery Cable Battery Post Cover BaclkBattery Post Cover RED + Hold Down Battery32 18 Assy GRD Wire 99HSB Assembly BASE-DOOR Ground WireIntake Duct HSB Duct Discharge RH FrontGenerac Power Systems, Inc Assy 2A 12V UL Battery Control BOX HSBCover Front Panel HSB Cover TOP Panel HSB512 Wire SET 3.0L Ford not Not SHOWN-USED to Hold OIL Drain AssemblyWasher Lock M12 Bracket DC ALT 3.0L FordFrame Tank Coolant Recovery Radiator R-IN,L-OUTVenturi 3.0L Ford HSB Side Support Radiator HSBNER Weldment Mounting Base Flange Fuel InletAssy Regulator 3.0L NG or LPV Washer Flat 5/16 ZincLeads Rotor 390 15KW 1P Direct HSB 2.5L Ford Rotor 390 20KW 1P Direct HSB 2.5L FordRotor 390 25KW 1P Direct HSB 2.5L Ford Rotor 390 40KW 1P Direct HSB 3.9L ChryslerMUFFLER, 3.0L Ford Gasket Exhaust RingMufflr Strap 6IN DIA HSB Washer Lock 3/8 SSELEMENT, AIR Cleaner Cover AIR CleanerTube AIR Intake 3.0L Ford Washer Flat M5Guardian Liquid-cooled 27 kW and 30 kW Generators Guardian Liquid-cooled 27 kW and 30 kW Generators This Warranty Shall not Apply to the Following

004988-1 specifications

Generac Power Systems has established itself as a leader in the generator industry, and the Generac Power Systems 004988-1 model exemplifies the company’s commitment to innovation, reliability, and performance. This standby generator is designed to provide seamless power solutions for both residential and commercial applications, ensuring that users remain connected and comfortable even during power outages.

One of the standout features of the 004988-1 model is its automatic transfer switch (ATS), which allows for instant power restoration within seconds of an outage. The ATS continuously monitors the electrical supply and automatically engages the generator when it detects a power failure, eliminating any stress or inconvenience for the user. This feature is particularly beneficial for those who may be away from home during an outage or for businesses that cannot afford downtime.

The 004988-1 is equipped with a powerful engine capable of delivering up to 20 kilowatts of backup power, sufficient to support essential household appliances and systems, such as HVAC, refrigeration, and lighting. Its robust construction ensures durability and longevity, equipped to withstand the rigors of extended use in various environmental conditions.

Another significant characteristic of this model is its emission-friendly design. Generac has incorporated advanced technologies to meet and exceed EPA standards, resulting in a cleaner and more environmentally friendly operation. The generator runs on natural gas or liquid propane, providing users with flexible fuel options and reducing dependency on traditional fuel sources.

Moreover, the 004988-1 comes with smart technology features, including Wi-Fi connectivity. This allows users to monitor and control their generator remotely via a smartphone app. Users can receive real-time notifications, monitor power usage, and conduct maintenance checks, ensuring peak performance of their generator.

The quiet operation of the 004988-1 is also noteworthy, making it an attractive option for residential areas where noise levels can be a concern. Generac has integrated sound-dampening technology, ensuring that the generator operates with minimal noise, allowing users to enjoy peace of mind without disruption.

In summary, the Generac Power Systems 004988-1 is a robust, reliable, and technologically advanced generator that seamlessly integrates into any household or commercial setup. With its automatic transfer switch, high power output, environmentally friendly design, smart technology features, and quiet operation, it stands out as an excellent choice for individuals seeking a dependable power solution for any situation.
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