Generac Power Systems 5410, 5412, 5411, 5413, 5415, 5414 manual Test 41 Check LPG Fuel Solenoid

Page 65

Section 7

DIAGNOSTIC TESTS

Results:

1.If Choke Plate is binding in Step 1, repair or replace binding Choke Plate. If Bi-Metal Heater Assembly tests good, go to Test 32.

2.If continuity was not measured in Step 3, repair or replace Wire 14 between the 4-tab Connector and Connector 3.

3.If the resistance value is incorrect in the Short to Ground step, or the Bi-Metal Heater Assembly does not function with voltage present, replace the Bi-Metal Heater Assembly.

TEST 41 – CHECK LPG FUEL SOLENOID

DISCUSSION:

If the LPG Fuel Solenoid (FS) fails to open, fuel will not be available to the engine and it will not start.

PROCEDURE:

1.Place one hand on the top of the LPG Fuel Solenoid. Activate the Fuel Prime Switch. You should be able to feel as well as hear the solenoid energize. If solenoid energizes discontinue testing.

2.Set VOM to measure resistance. Disconnect Wire 0 from the LPG Fuel Solenoid. Connect one meter test lead to Wire 0. Connect the other test lead to a clean frame ground. “Continuity” should be mea- sured. Reconnect Wire 0 to LPG shut off valve.

Short to Ground:

Set VOM to measure resistance. Disconnect Wire 14A from the LPG Fuel Solenoid. Connect one meter test lead to LPG Fuel Solenoid. terminal that Wire 14A was just removed from. Connect the other meter test lead to a clean frame ground. LPG Fuel Solenoid. Coil resistance of approximately 30-32 ohms Should be measured. Current draw of the LPG Fuel Solenoid at nominal voltage Is approximately 380 milliamps or 0.380 amps.

RESULTS:

1.If the solenoid energized in Step 1, proceed to Test 29.

2.If “Continuity” was not measured in Step 2 repair or replace Wire 0 between the LPG Fuel Solenoid (FS) and the Ground Terminal (GRD1) in the con- trol panel.

3.If “Continuity” was measured in Step 2, repair or replace the Fuel Solenoid (FS).

241

FUEL SOLENOID

0

FUEL REGULATOR

Figure 7-49. – Fuel Solenoid

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Contents Diagnostic Repair Manual Safety Table of Contents Section Electrical Data 78-79 Electromagnetic Induction MagnetismElectromagnetic Fields More Sophisticated AC Generator Simple AC GeneratorGenerator Operating Diagram Generator AC Connection System Field BoostConnection for 120 Volts Only Stator Assembly Rotor AssemblyExcitation Circuit Components Brush HolderDescription Crankcase BreatherControl Panel Components Control Panel Component IdentificationEffects of Dirt and Moisture Cleaning the GeneratorInsulation Resistance Testers Drying the GeneratorStator Insulation Resistance Testing Stator Insulation Testing Rotor InsulationTesting Rotor Insulation MegohmmeterVOM MetersMeasuring AC Voltage Measuring DC VoltageMeasuring Resistance Measuring CurrentOhm’s Law Electrical UnitsOperational Analysis IntroductionCircuit Condition Cranking Circuit Condition Running Circuit Condition Shutdown Recommended Battery BatteryBattery Cables Printed Circuit BoardAmp Fuse Start-Stop SwitchStarter Contactor Relay Starter Motor Start-Stop SwitchProblem 1 Voltage & Frequency Are Both High or Low If Problem Involves AC OutputTest Troubleshooting Flowcharts Proble 5 Priming Function Does Not Work Gasoline Models Problem 6 Engine Will Not Crank Test 26 Check Test 20 Check Check Fuel Wire 14 Power Good Troubleshooting Flowcharts Problem 8 Engine Starts Hard and Runs Rough Gasoline Units Problem 8 Engine Starts Hard and Runs Rough LP Units LOW OIL Pressure Flashes on SW1 LED YES Problem 10 7.5A F1 Fuse BlowingTest 1 Check No-Load Voltage Frequency ProcedureTest 2 Check Stepper Motor Control DiscussionTest 4 Fixed Excitation Test/Rotor Amp Draw Six Pin J2 Connector Wire ColorsFixed Excitation Test, Step B Test 6 Test Stator DPE Winding Test 5 Check Field BoostStator Excitation Winding Test 7 Check Sensing Leads / Power WindingsTest 8 Check Brush Leads Stator Power Winding LeadsTest 9 Check Brushes & Slip Rings Test 10 Check Rotor AssemblyTest 11 Check Main Circuit Breaker SchematicTest 12 Check Load Voltage Frequency Test 13 Check Load Watts AmperageTest 15 Check Fuel Pump Test 14 Try Cranking the EngineTest 16 Check 7.5 Amp Fuse Test 17 Check Battery & CablesTest 18 Check Power Supply to Printed Circuit Board Test 20 Check Start-Stop Switch Test 19 Check Continuity of WireTest 22 Check Starter Contactor Relay Test 21 Check Power Supply to WireTest 24 Check Starter Motor Test 23 Check Starter ContactorTools for Starter Performance Test Checking the PinionPinion Minimum rpm 4500 Maximum Amps To Carburetor GAS Test 25 Check Fuel Supply29. Fuel Regulator Test 26 Check Wire 14 Power SupplyTest 28 Check Fuel Solenoid Gasoline Models Test 27 Check WireTools RequiredTwo Ignition Testers Generac P/N 0C5969 Test 29 Check Ignition SparkTest 30 Check Spark Plugs Test 31 Check and Adjust Ignition Magnetos37. Setting Ignition Magneto Armature Air Gap Flywheel KEY Test 32 Check Valve AdjustmentChecking Flywheel Magnet Test 34 Check Choke Solenoid Test 33 Check CarburetionSolenoid Panel To ControlTest 36 Check Oil Pressure Switch Test 38 Test Oil Temperature Switch Test 37 Check Wire 86 for ContinuityTest 40 Test Choke Heater Test 39 Check Wire 85 for ContinuityTest 41 Check LPG Fuel Solenoid Section Exploded Views QTY Description Enclosure Drawing No G3881-C Enclosure Door Views Screw Plastite HI-LOW #10X3/8 Engine Accessories Drawing No G7718-B QTY Description 48,49 Square Head Plug Rotor & Stator Drawing No G3953-b NUT TOP Lock FL M8-1.25 Charts Nominal Resistances of Generator Windings at 68f Generator SpecificationsElectrical Data Electrical Data OG7515 REV. a

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