Generac 004373-1, 004626-0 owner manual Using the AUTO/OFF/MANUAL Switch

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Section 3 — Operation

Guardian Liquid-cooled 40 kW Generator

3.1 CONTROL CONSOLE COMPONENTS

￿ 3.1.6 AUTO/OFF/MANUAL SWITCH

The components of a liquid-cooled generator control

See Section 3.2.

console (Figure 3.1) are as follows:

 

Figure 3.1 – Control Console

15

￿3.1.7 FAULT INDICATOR LAMP

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

Low oil pressure

High coolant temperature

Low coolant level

Overcrank

Overspeed

￿3.1.8 15-AMP FUSE

This fuse protects the control console’s DC control cir- cuit against electrical overload. If the fuse has melted open because of an overload, engine cranking and start- up cannot occur. Replace the fuse with an identical AGC 15-amp replacement fuse.

￿3.1.1 AC VOLTMETER

The voltmeter displays generator AC output voltage dur- ing operation. Voltage is regulated by a solid-state volt- age regulator and is proportional to AC frequency. Refer to the unit’s DATA PLATE for rated AC voltage.

￿3.1.2 AC AMMETER

This indicates current draw of connected electrical loads during operation. DO NOT EXCEED THE UNIT’S RATED MAXIMUM CONTINUOUS CURRENT. Refer to the unit DATA PLATE.

￿3.1.3 AC FREQUENCY METER

This indicates generator AC output frequency in Hertz (cycles per second). Frequency is proportional to engine speed. Units with a four-pole rotor, supply 60 Hertz at 1,800 rpm. The frequency reading with no electrical loads connected (no-load condition) should be between 60-62 Hertz.

￿3.1.4 DC VOLTMETER

The generator is equipped with a belt-driven DC alter- nator, which maintains battery state of charge when the engine operates. The control module assembly (CMA) also incorporates a trickle charge circuit that maintains battery state of charge during nonoperating periods. Battery voltage should read approximately12.5 to 14.5 volts DC. A low battery voltage indicates the battery is discharging.

￿3.1.9 7.5 AMP INLINE FUSE (NOT SHOWN)

This inline fuse is connected in the 15A line that runs between the Auto/Off/Manual switch and position 10 of the 76009A PCB. This fuse protects the start, fuel, field boost, and transfer outputs from the PCB and will open if there is excessive current draw on any one of these outputs.

￿3.1.10 VOLTAGE-PHASE SELECTOR SWITCH

This switch permits selection between either line-to-line or line-to-neutral voltage and amperage readings on the console AC voltmeter and AC ammeter.

￿3.1.11 SET EXERCISE TIME SWITCH

This switch allows to program the generator to start and exercise automatically. (See Section 3.6, page 14)

3.2USING THE AUTO/OFF/MANUAL SWITCH

￿3.2.1 “AUTO” POSITION

Selecting this switch position activates fully automatic system operation. It also allows the unit to start and exercise the engine every seven days with the setting of the exercise timer.

￿3.1.5 HOURMETER

This indicates the time the engine-generator has operat- ed, in hours and tenths of hours. Use the hourmeter along with the periodic maintenance schedule for your generator set.

12 Generac® Power Systems, Inc.

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Contents Power SYSTEMS, INC Introduction Authorized Dealer LocationMaintenance Safety Rules General InformationInstallation Section Installation Drawings 56-57 Warranty Back CoverGeneral Hazards Electrical Hazards Generator AC Connection Systems UNPACKING/INSPECTIONGenerator Automatic System OperationEngine Protective Devices SpecificationsMain Circuit Breaker Engine Fuel Requirements RecommendationsGenerator and Load Compatibility Conversion to LP GAS VaporAIR Fuel Ratio Controller CoolantEmissions Control System Nfpa Standards Standby Generator InstallationBasic Standby Electric System Other Published StandardsPre-Packaged Type Switch Transfer Switch Start Signal ConnectionsGTS Type Switch Emergency Circuit Isolation MethodVented Batteries Battery InstallationPreparation Before START-UP Prior to Initial START-UP Using the AUTO/OFF/MANUAL Switch Automatic Transfer Operation OFF PositionManual Position Sequence of Automatic OperationWeekly Exercise Cycle Checking the Engine OIL LevelChanging the Engine OIL and Filter Oil and Filter Change ProcedureChanging the Engine AIR Cleaner Engine Oil RecommendationsBattery Maintenance Spark PlugsOverload Protection for Engine DC Electrical System Miscellaneous MaintenanceCleaning the Generator DC FuseReturn To Service OUT of Service ProcedureRemoval From Service Service Schedule SYSTEM/COMPONENT Procedure FrequencyTroubleshooting Guide Problem Cause CorrectionElectrical Data Section Power Systems, Inc Generac Power Systems, Inc Electrical Data Electrical Data Electrical Data Wiring Diagram RED Brush Units DPEPanel Face Switch Selector 6A AMP/V Switch Rocker Dpst 125V SPDSwitch TOG Dpdt 15/10 SP Part of Control Panel Wire HarnessGenerators Cover Plate AVR CONTROLLER, B-C #DPG-2103Screen Cover Plate EgovHousing Governor Connect Assembly Motor StepperConnector Interface Assembly Cover Conn HousingPlug Button 3 DIA BASE, Mounting ASSEMBLY, 4.3LAssembly Groundwire 10/3/8 DIRECT-COUPLED4640 31 33 Engine 4.3L GM Switch OIL PressureDC Alternator Assembly Pulley TensionerExploded Views and Parts Lists Wires Spark Plug 4.3L Retainer Plug WiresRetainer Spark Plug Wires Connector C/C VentAdd item #42 vinyl trim as shown Assembly Scroll 390 SAE FAN Assembly 390 SAE DDAssembly Brush & Shunt Carrier Rear BearingShakeproof INT M6 SS Assembly Cover AccessDuct Bottom Duct Front PanelRadiator 14 FIN/INCH Tank Coolant RecoveryBracket Coolant Recovery Tank Venturi 16 DIA 35KWGasket AIR Cleaner Plate AIR Cleanr BottomPlate AIR Cleaner TOP Gasket Carburetor AdaptorHose 1 in ID LP GAS Mixer only Natural GASNPT X Actuator Throttle 42MMNipple Pipe 3/4NPTX4.5 BLK IRN Support Solenoid NAT GASNipple TOE 3/4 NPT X Hose 1IN ID LP GASDECAL,INLET Pressure Regulator N/G R600SLUG Rngtng INS HEATER, Engine 2000W Hose Connection TEEHEATER, Engine 1800W HOSE, Preformed Block HeaterCable Battery Black #1 X Battery 12VDC 90-AH 27F OptionalHold Down Battery Cable Battery RED #1 X11 12 Relay Solenoid 12VDC PNL MNT Cover Lower Connection BOXBushing Snap SB-2.5-31 Transformer 200A to 5A 5VAExploded Views and Parts Lists Mounting Band A-GRP Catalyst Tube Straight a GroupMuffler Catalyst 4.3L Shield Heat Crossover 4.3LMuffler 2-1/2 INLET/OUTLET Clamp Band MufflerGuardian Liquid-cooled 40 kW Generators Installation Drawings 12V Battery see Note Lifting EYE Places Warranty Schedule This Warranty Shall not Apply to the Following