Manuals / Generac Power Systems / Lawn and Garden / Portable Generator

Generac Power Systems 9 kW NG, 10 kW LP, 13 kW NG, 7 kW NG, 8 kW LP, 17 kW LP Operational analysis

Models: 18 kW NG 14 kW LP 16 kW NG 20 kW LP 17 kW LP 8 kW LP 9 kW NG 7 kW NG 13 kW NG 10 kW LP

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Page 63

Transfer switch

Part 3

Section 3.2

Operational analysis

Figure 2 is a wiring diagram for a typical “W/V-Type” transfer switch.

RED

BLK

RED

BLK

BLK

N2A

RED

N1A

126

126

GRN

A

GRN

N2A

TR1

N2A

N1A

N2A

1

3

1 C1 2

4

6

7

9

126

A

205

N1

N2

A B

E1

N1A

15B

23

SW2

N1A

N1A

E1

BLK

SW1

RED

205

N2A

N2A

SW3

BLK

BLK

RED

RED

E1

E2

205

B

T1

T2

1 C2 2

N1A N2A

E2

B

E1

E2

BC

A

A

A

205

F1

F2

F3

23

BLK

RED

15B

BLK

B

B

B

RED

-

+

E1

BLK

RED

WIRE

WIRE

N1

N2

T1

T1

15B

0

TB10D4698-T 1

2

3

N1

N2

0

15B

23

LEGEND

			BC-BATTERY CHARGER
			BC-BATTERY CHARGER
GENERATORTO CONTROLPANEL			C1-UTILITY COIL & RECTIFIER
GENERATORTO CONTROLPANEL			SW2,SW3-LIMIT SWITCHES
			C2-GENERATOR COIL & RECTIFIER
			F1,F2,F3-5A, 600V FUSE
			LC-CIRCUIT BREAKER (LOADS)
			(16 CIRCUIT SHOWN FOR REFERENCE ONLY)
			N-NEUTRAL
			SW1-AUTOMATIC TRANSFER SWITCH
			TB1-TERMINAL STRIP
			TR1-TRANSFER RELAY

Figure 2. Wiring Diagram

Page 61

Image 63

Generac Power Systems 9 kW NG, 10 kW LP Operational analysis, Is a wiring diagram for a typical W/V-Type transfer switch

Contents

Air-Cooled Product Electrical formulas Automatic Operating Sequences Problem 12 No Battery Charge 147 Specifications Fuel Consumption EngineMounting Dimensions Right Side View Door removed Major FeaturesPart General Information Rainproof Enclosure Fitted Rated Ambient Temp 40C Generator Identification PartIntroduction Neutral FloatingGrounding The Generator Installation basicsTransfer Switch / Load Center Selecting a LocationTypical Installation Installation basics PartNatural Gas Fuel Interconnections Power Source And Load Lines System Control InterconnectionsNon-Prepackaged Interconnections Part Control Wires from Transfer SwitchPRE 08 HSB AIR-COOLED Generators Single & V-TWIN Engines Non-Prepackaged InterconnectionsFuel Requirements Reconfiguring The Fuel SystemPreparation Before Use Part GeneralPreparation before use Install the battery, door and close the roofEngine Oil Recommendations Measuring DC Voltage MetersVom Measuring AC VoltageTesting, cleaning and drying Part Measuring CurrentMeasuring Resistance Electrical Units Ohm’s LawVolts Amps Ohms ONE 1 Second Visual InspectionInsulation Resistance MegohmmeterRepeat between Wire 2 and Stator Lead Stator Insulation Resistance Test 12-20 kWStator Insulation Resistance Test 10 kW Drying The Generator Cleaning The GeneratorRotor Insulation Resistance Test 10 kW Rotor Insulation Resistance Test 12-20 kWOverspeed Shutdown Low BatteryHigh Temperature Switch Low Oil Pressure ShutdownOvercrank Shutdown Engine-generator protective devices PartControl Panel Operating InstructionsManual Transfer To Standby Manual Startup KW Installation AssistantOperating instructions Part To Select Automatic OperationSeconds then re-crank if additional crank cycles exist Automatic operating parametersExercise Automatic operating parameters PartManual AutoPart AC Generators Rotor Assembly Engine-Generator Drive SystemAC Generator Description & components Stator AssemblyMain Line Circuit Breaker Description & components PartBrush Holder And Brushes 12-20 kW Other AC Generator ComponentsField Boost 12-20 KW Rotor Residual MagnetismStartup Operational analysis PartOperation 8/10 kW Operation 12-20 kWTroubleshooting flowcharts Troubleshooting flowcharts Part Troubleshooting flowcharts Problem 3 Generator Produces Low Voltage at No-LoadProblem 4 Generator Produces High Voltage at No-Load Units with Results SafetyTest 1 Check Main Circuit Breaker Test 2 Check AC Output VoltageTest 4 Fixed Excitation Test Rotor Amp Draw Test Diagnostic tests PartRemove jumper lead connected to Wire 4 and Wire 15B ProcedureTest 5 Wire Continuity 12-20 kW Diagnostic testsExample Test 7 Testing The Stator With a Vom 12-20 kW Reconnect WireTest 6 Check Field Boost 12-20 kW Repeat using stator lead Wire Test Control Panel Wires for ContinuityTest 8 Test Brushless Stator Repeat using stator lead Repeat using WireTest 9 Check Capacitor Measured Meter lead to WireRepeat using Wires 2 Test 10 Test DPE Winding on Brushless unitsIf Continuity was measured in Steps 5 and 6 proceed to Step Remove Wire 4 from the voltage regulatorTest 11 Resistance Check Rotor Circuit 12-20 kW Test 12 Check Brushes And Slip Rings 12-20 kWTest 14 Check AC Output Frequency Test 13 Test Rotor Assembly 12-20 kWRemove air cleaner cover to access stepper motor Test 16 Check Stepper Motor Control V-twin Engine UnitsLoosen the governor clamp bolt Figure Pull ARM this Direction to Close Throttle Test 17 Check And Adjust Voltage Regulator 12-20 kWTest 21 Field Flash Alternator KW Units Refer back to flow chartTest 18 Check Voltage Frequency Under Load Test 20 Check Engine ConditionConstruction of Energizing Cord Page Transfer Item Description General EnclosureTransfer Relay Transfer MechanismUtility N1 and N2 Neutral LugManual Transfer Handle Terminal BlockFuse Holder Fuses F1, F2Fuses F3 Operational Analysis Is a schematic for a typical W/V-Type transfer switchOperational analysis Is a wiring diagram for a typical W/V-Type transfer switchSW1 Utility Source Voltage AvailableUtility Source Voltage Failure Generator Power Available, Waiting to TransferTransfer Action to Standby Position Transfer To StandbyGenerator Powering Load Utility Restored, Generator Still Providing Output to Load Utility RestoredUtility Restored, Transfer Relay De-energized Utility Restored, Transfer Switch De-energizedUtility Restored, Retransfer Back to Utility Utility Restored, Retransfer Back To UtilityTransfer Switch in Utility Transfer Switch In UtilityTroubleshooting flow charts Part Introduction To TroubleshootingProblem 7 In Automatic Mode, No Transfer to Standby Problem 9 Blown F1 or F2 Fuse Troubleshooting flow chartsCheck N1 & N2 Problem 14 No Battery Charge Load Shed Transfer Switch Problem 11 No Battery Charge Pre-Wire Load CenterProblem 12 No Battery Charge Rtsn & Rtse Transfer Switch Problem 13 No Battery Charge GenReady Load CenterIf the generator has been shut down, proceed as follows Test 26 Check Voltage at Terminal Lugs E1, E2Manual Transfer Switch Operation Test 27 Check Manual Transfer Switch OperationTest 28 Check 23 and 15B Wiring Reconnect the J2 connector to the PCBPROCEDURE/ Results Remove the J2 connector from the circuit board Test 29 Test Transfer Relay TrSet VOM to measure DC voltage Test 30 Standby Control Circuit Test 31 Check WireSW1 Test 32 Utility Control Circuit OutputN2A Test 34 Check Fuses F1 and F2 Test 33 Test Limit Switch SW2 and SW3Test 35 Check N1 and N2 Wiring Test 36 Check N1 and N2 VoltageReplace blown fuses as needed Test 37 Check Utility Sensing Voltage at the Circuit Board Test 38 Check Utility Sense VoltageTest 39 Check Voltage at Terminal Lugs N1, N2 Generator Transfer SwitchMeasure across points M and N VDC should be measured Test 40 Check Battery ChargerTest 42 Check Wire 0 and Wire15B Pre-wire load center Measure across points a and C VAC should be measuredRtsn & Rtse Transfer Switch Test 45 Check Wire 0/15B Rtsn & Rtse Transfer SwitchMeasure across points E and F VAC should be measured 15B Test 43, 44, and 45 Rtse Transfer Switch Test Points Disconnect the J2 connector from the printed circuit board Test 48 Check Wire 0/15B GenReady Load CenterSection Load Shed Transfer Switch Measure across points C and D VAC should be measuredMeasure across points E and D VAC should be measured LSS ATSLSC Test 51 Check Wire 0 and Wire 15B Load Shed Transfer Switch Part DC Control Circuit Board Auto-Off-Manual SwitchDescription and components Part Terminal Strip / InterconnectionAmp Fuse Description and componentsKW Printed Circuit Boards and J1 Connector Harness END Remote Wireless Connection J2 Connector PCB END J1 Connector Stepper MotorPCB END Harness END Harness END Remote Wireless Connection N1/N2 Connector17 and 20 kW Printed Circuit Board and J1 Connector Menu System Navigation Choke Solenoid Connector Pin Number IdentificationComponents DescriptionStator Circuit Condition Utility Source Voltage Available Initial Dropout of Utility Source Voltage Circuit Condition Initial Dropout of Utility Source Voltage Utility Voltage Dropout and Engine Cranking Circuit Condition Engine Cranking Engine Startup and Running Circuit Condition Engine Startup and Running Initial Transfer to the Standby Source Circuit Condition Initial Transfer to Standby Utility Voltage Restored / Re-transfer to Utility Circuit Condition Utility Voltage Restored Engine Shutdown Circuit Condition Retransfer to Utility and Engine Shutdown Controller Switch BAD Replace Controller Assembly Problem 17 Engine Cranks but Won’t Start Readjust Replace Choke Solenoid BAD Problem 19 Shutdown Alarm/Fault Occured Problem 20 7.5 Amp Fuse F1 Blown Problem 21 Generator Will Not ExerciseProblem 22 No Low Speed Exercise Test 56 Check Position Of Auto-Off Manual Switch Test 58 Auto-Off-Manual Switch Twin OnlyTest 57 Try a Manual Start Test 61 Check Battery Test 59 Test Auto OperationsTest 60 Check 7.5 Amp Fuse Typical Battery Load Tester Test Battery ConditionSet a VOM to measure DC voltage Test 62 Check Wire 56 VoltageIf battery voltage is indicated in refer back to flow chart Test 63 Test Starter Contactor Relay V-twin OnlyTest 64 Test Starter Contactor Single Cylinder Engine Reconnect Wire 13 to the SCRPinion Test 65 Test Starter MotorShorted, open or grounded armature Checking the PinionTools for Starter Performance Test PinionTest 66 Check Fuel Supply Pressure PortSolenoid Removed 12-20 kW Gas Pressure Test point Test 67 Check Circuit Board Wire OutputDisconnect the C3 Connector Test 68 Check Fuel SolenoidTest 69 Check Choke Solenoid Solenoid De-Energized, Choke Closed KW Units Approximately 3.7 ohms should be measuredDisconnect the C3 Connector Set a VOM to measure DC voltage Disconnect C3 Connector Set a VOM to measure resistanceTest 70 Check for Ignition Spark KW Choke Solenoid Test 71 Check Spark Plugs Check Compression Test 73 Check Shutdown WireRemove a spark plug Repeat Steps 1 through 8 on remaining cylinderDepending on engine type, do the following Test 74 Check and Adjust Ignition MagnetosMagneto Setting Ignition Magneto Armature Air GapCylinder One Back, Short With oil level correct, try starting the engine Test 75 Check Oil Pressure Switch WireNavigate to the Digital inputs display screen Check engine crankcase oil levelRemove the High Oil Temperature Switch Test 76 Check High Oil Temperature SwitchTest 77 Check and Adjust Valves Replace switch if it fails the testTest 78 Check Wire 18 Continuity Set the AUTO-OFF-MANUAL switch to the Manual positionBall Stud JAM NUT Test 79 Test Exercise Function Test 80 Check Cranking and Running CircuitsRecord the current date and time of the unit 8kW Choke SolenoidIf the solenoid closed, replace the controller Test 81 Check to see if Low Speed Function is enabledDisconnect Wire 4 and Wire 0 from the Voltage Regulator VR Test 82 Check operation Choke SolenoidPart Operational Tests Set the generator main line circuit breaker to OFF or open Manual Transfer Switch OperationSystem functional tests Part Electrical ChecksGenerator Tests Under Load System functional testsSetting The Exercise Timer Verify that the AUTO-OFF-MANUAL switch is set to AutoChecking Automatic Operation Part Disassembly Major Disassembly Part Front Engine AccessRemove control harnesses Major Disassembly Section Section Major Disassembly Section Section Section Section Engine mount nuts with ground wires. See Figure Torque Requirements Unless Otherwise Specified Part Electrical Data Drawing #0G7945 Wiring Diagram, 8 kW Home Standby PartWiring Diagram, 8 kW Home Standby Drawing #0G8511 Schematic, 8 kW Home Standby PartPart Schematic, 8 kW Home Standby Drawing #0G7946 Wiring Diagram, 10 kW Home Standby PartPart Wiring Diagram, 10 kW Home Standby Drawing #0G8512 Schematic, 10 kW Home Standby PartPart Schematic, 10 kW Home Standby Drawing #0G7947 Wiring Diagram, 14 kW Home Standby PartPart Wiring Diagram, 14 kW Home Standby Drawing #0G8513 Schematic, 14 kW Home Standby PartPart Schematic, 14 kW Home Standby Drawing #0G7948 Wiring Diagram, 17 kW Home Standby PartPart Wiring Diagram, 17 kW Home Standby Drawing #0G8514 Schematic, 17 kW Home Standby PartPart Schematic, 17 kW Home Standby Drawing #0G8186 Wiring Diagram, 20 kW Home Standby PartPart Wiring Diagram, 20 kW Home Standby Drawing #0G8515 Schematic, 20 kW Home Standby PartPart Schematic, 20 kW Home Standby Wiring Diagram, Home Standby Transfer Switch, 9/10/12/16 circuitPart Wiring Diagram, Home Standby Drawing #0G7959 Schematic, Home StandbyPage Page Page MyGenerac.com