Generac Power Systems 004988-1 owner manual Manual Transfer START-UP Engine Governor Adjustments

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Section 3 - Operation

Guardian Liquid-cooled 27 kW and 30 kW Generators

Figure 3.1 - Home Standby Generator Panel

‹3.2.6 SYSTEM READY LED

SET EXECISER TIME SWITCH

LED INDICATORS:

FLASHING GREEN LED = NO UTILITY SENSE

5 FLASHING RED LED'S = EXERCISER NOT SET

(IN AUTO MODE ONLY) SOLID GREEN LED = SYSTEM READY, UTILITY POWER ON RED LED'S = INDIVIDUAL FAULT

(SEE OWNER'S MANUAL FOR COMPLETE LED DETAILS)

 

 

OVER CRANK

RED LED

 

 

 

SE

 

SE

 

F

F

F

 

 

 

AUTO

 

OFF

 

 

 

 

 

OFF

 

ON

 

 

 

SET

MANUAL

GREEN LED

EXERCISE

TO SET EXERCISER TIME

TIME

1) PLACE AUTO/OFF/MANUAL SWITCH TO AUTO POSITION.

0E7194

The System Ready LED (green) has two main pro- poses. First, the LED will be ON when the AUTO/OFF/MANUAL switch is in the AUTO position, utility is present, and there are no system alarms. This ON state indicates the system is fully ready for automatic operation.

The system ready LED will be OFF when the switch is in the MANUAL or OFF positions.

The system ready LED is also used to indicate the presence of utility sensing at the PCB when the switch is either in the AUTO or MANUAL modes. The LED will flash at the rate of 1/2 second on, 1/2 second off

 

AUTO/OFF/MANUAL

4A FUSE

SWITCH

 

BATTERY

15A FUSE

CHARGER

MAIN

 

POWER

if the utility sensing level is below the transfer back threshold.

This secondary function is only available with dip switch two in the OFF position (standard ATS appli- cation).

‹3.2.2 FAULT INDICATOR LED

This LED goes ON when one or more of the following engine faults occurs and when engine shuts down.

•Low Oil Pressure

•Overcrank

•Low Battery

•Overspeed/RPM Sensor Loss

•High Coolant Temperature/Low Coolant Level

See Section 1.7 for further explanation of engine pro- tection functions.

‹3.2.3 15 AMP FUSE

Fuse protects the control console’s DC control circuit against electrical overload. If the fuse has melted open because of an overload, engine cranking and startup cannot occur. If the fuse needs to be replaced, use only an identical 15-amp replacement fuse. (Type AGC)

‹3.2.4 4.0 AMP INLINE FUSE

This fuse protects the battery charger against electri- cal overload. If the fuse needs to be replaced, use only an identical 4 amp replacement fuse (type AG).

NOTE:

This fuse will not remove the + battery input power from the PCB when it opens. This means the exercise timer will not be reset.

‹3.2.5 SET EXERCISE TIME SWITCH

This switch allows programming the generator to start and exercise automatically. “See Weekly Exercise Cycle.”

3.3MANUAL TRANSFER AND

START-UP

To transfer electrical loads to the Standby (EMER- GENCY) power source side and start the engine man- ually, refer to the Owner’s Manual of the particular transfer switch.

3.4ENGINE GOVERNOR

ADJUSTMENTS

Engine speed governing is also controlled by the engine control board. Connector J2 on the engine control board interfaces with a governor driver mod- ule and the Bosch throttle body. The engine governor has been set by the factory during final testing of the generator and, in most cases, should not be adjusted.

If, however, adjustments are necessary, or a new engine control board is installed in the generator, the following procedure should be followed (Figure 3.2):

1.Set all three potentiometers (pots) fully counter- clockwise.

2.Under no load condition, increase the GAIN pot as much as possible without causing instability.

3.Apply 1/4, 1/2, 3/4 and full load to the unit. Decrease the GAIN pot if there is instability at any load point.

4.Under full load condition, increase the stability pot until the unit returns to 60 Hertz (or 50 Hertz in 50 Hertz applications).

5.Reduce load to 3/4, 1/2, 1/4 and no load. Decrease the stability pot if there is instability at any load point.

Generac® Power Systems, Inc. 13

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Contents Liquid-cooled, Prepackaged Standby Generators Introduction Authorized Service Dealer Location‹ Operation and Maintenance ‹ HOW to Obtain ServiceTable of Contents General Hazards Electrical Hazards Generator AC Connection Systems Transfer SwitchGenerator Automatic System OperationEngine Protective Devices ‹ 1.7.2 High Coolant Temperature Switch‹ 1.7.1 LOW OIL Pressure Switch ‹ 1.7.3 LOW Coolant Level SwitchLifting the Generator Unpacking‹ 1.10.2 Engine Specifications SpecificationsReconfiguring the Fuel System ‹ 1.10.1 Generator SpecificationsCoolant Recommendations Torque SpecificationsBefore Installation Engine OIL RecommendationsEmergency Circuit Isolation Method Generator Mounting SupportBasic Standby Electric System Generator LocationGenerator AC Neutral Connections Transfer Switch Signal ConnectionsTotal Circuit Isolation Method Grounding the Generator‹ 2.11.1 Prior to Initial START-UP Battery Installation‹ 2.11.2 Transfer Switch Preparation Before START-UPControl Console Components Using a Standard GTS Transfer Switch‹ 3.2.6 System Ready LED Manual Transfer START-UP Engine Governor Adjustments‹ 3.2.2 Fault Indicator LED ‹ 3.2.5 SET Exercise Time SwitchWeekly Exercise Cycle Retransfer and ShutdownAutomatic Operation Overload Protection for Engine DC Electrical System Checking Fluid LevelsCooling System ‹ 4.5.3 Exercise System ‹ 4.5.2 Check Battery‹ 4.4.3 Engine Coolant ‹ 4.5.1 Check Engine OIL Level‹ 4.5.13 Coolant Change Miscellaneous Maintenance‹ 4.5.11 Changing the Engine AIR Cleaner ‹ 4.6.1 Cleaning the Generator‹ 4.6.4 Battery Replacement ‹ 4.6.3 Battery MaintenanceService Maintenance Interval Information Scheduled MaintenanceLevel Maintenance Level Problem Cause Correction Troubleshooting PointsInstallation Diagram Customer Connection PCB J2 ICT LOS WLS HCT Starter Carrier Bolt Hold Down Battery Boot Battery CableBattery Post Cover Baclk Battery Post Cover RED +32 18 Duct Discharge RH Front Assy GRD Wire 99HSBAssembly BASE-DOOR Ground Wire Intake Duct HSBGenerac Power Systems, Inc Cover TOP Panel HSB Assy 2A 12V UL BatteryControl BOX HSB Cover Front Panel HSB512 Bracket DC ALT 3.0L Ford Wire SET 3.0L Ford notNot SHOWN-USED to Hold OIL Drain Assembly Washer Lock M12Frame Side Support Radiator HSB Tank Coolant RecoveryRadiator R-IN,L-OUT Venturi 3.0L Ford HSBNER Washer Flat 5/16 Zinc Weldment Mounting BaseFlange Fuel Inlet Assy Regulator 3.0L NG or LPVLeads Rotor 390 40KW 1P Direct HSB 3.9L Chrysler Rotor 390 15KW 1P Direct HSB 2.5L FordRotor 390 20KW 1P Direct HSB 2.5L Ford Rotor 390 25KW 1P Direct HSB 2.5L FordWasher Lock 3/8 SS MUFFLER, 3.0L FordGasket Exhaust Ring Mufflr Strap 6IN DIA HSBWasher Flat M5 ELEMENT, AIR CleanerCover AIR Cleaner Tube AIR Intake 3.0L FordGuardian 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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