Guardian Technologies 4583 Test 21- Check 10 Amp Fuse, Test 22- Check Battery & Cables, BCR1BCR2

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Section 6

DIAGNOSTIC TESTS

Short to Ground:

4.Set the VOM to measure resistance. Connect the positive (+) test lead to the case housing of the BCR. Connect the negative (-) test lead to an outer terminal. INFINITY should be mea- sured. Now connect the negative test lead to the BCR center terminal. INFINITY should be measured. Next, connect the negative test lead to the remaining outer BCR terminal. Once again INFINITY should be measured.

6666A

13A15

7777A

BCR1BCR2

Figure 6-25. – Battery Charge Rectifier

RESULTS:

1.If any of the previous steps has failed, replace the Battery Charge Rectifier.

2.If the BCR tests good, refer back to the flow chart.

TEST 20 - CHECK 10 AMP CIRCUIT BREAKER

PROCEDURE:

1.Set a voltmeter to measure resistance.

2.Locate the 10 Amp circuit breaker (CB1) in the control panel. See Page 17 for Circuit breaker location.

3.Disconnect Wire 15A and Wire 13A from the circuit breaker.

4.Connect one meter test lead to one terminal of the circuit breaker. Connect the other meter test lead to the remaining terminal on the circuit breaker. Continuity should be measured. See Figure 6-26.

RESULTS:

1.If continuity was measured the breaker is good refer back to the flow chart.

2.If INFINITY or a open condition was measured replace the circuit breaker.

00.00

13A

15A

10A CIRCUIT BREAKER (CB1)

Figure 6-26. – Testing 10 Amp Breaker

Test 21- Check 10 Amp Fuse

Figure 6-27. – 10 Amp Fuse (Located in Rear of

Control Panel)

PROCEDURE:

Push in on fuse holder cap and turn counterclockwise. Then, remove the cap with fuse. Inspect the Fuse.

RESULTS:

If the Fuse element has melted open, replace the Fuse with an identical size fuse. If Fuse is good, refer back to flow chart.

Test 22- Check Battery & Cables

PROCEDURE:

1.Inspect the battery cables and battery posts or terminals for corrosion or tightness. Measure the voltage at the terminal of the Starter Contactor and verify 11-12 volts DC is available to the generator during cranking. If voltage is below 11 volts DC,

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Contents Diagnostic Repair Manual Safety Replacement PartsTable of Contents Section Disassembly and Exploded Views 66-71 Electromagnetic Induction MagnetismElectromagnetic Fields More Sophisticated AC Generator STATORs AC power windingsSimple AC Generator Generator Operating Diagram VOM MetersMeasuring AC Voltage Measuring DC VoltageMeasuring Current Measuring ResistanceElectrical Units Ohms LawEngine-Generator Drive System Rotor AssemblyIntroduction AC Generator Other AC Generator Components Stator AssemblyBrush Holder and Brushes Excitation Circuit BreakerVoltage Regulator Underfrequency Adjust162 Operation Rotor Residual MagnetismField Boost Circuit Stator Insulation Resistance Test Insulation ResistanceMegohmmeter Testing ALL Stator Windings to Ground Test Between WindingsDrying the Generator Cleaning the GeneratorRotor Insulation Resistance Test Printed Circuit Board BatteryRecommended Battery Circuit Board ConnectionsControl Panel Component Identification ENGINE DC CONTROLTerminal Block Terminal BLOCKTB2 TB1 C1 Female Side C1 Male SideC2 Female Side C2 Male Side Page Circuit Condition Rest = 12 VDC Control Circuit Condition Start IM1 SP1 IM2 SP2 RED Black Battery Circuit Condition RUN = Idle Control Transformer Output CIRcUIT Condition Stop Fault Shutdown Introduction If Problem Involves AC OutputProblem 1 Voltage & Frequency Are Both High or Low Or Replace If BAD Load Watts Problem 4 No Battery Charge Output Problem 5 No 10A Battery Charge OutputProblem 6 Engine Will Not Crank Problem 7 Engine Cranks But Will Not Start Problem 8 Engine Starts Hard and Runs Rough Problem 9 Engine Starts Then Shuts DownProblem 10 10 Amp Fuse F1 Blowing Problem 14 Engine Hunts / Erratic Idle Problem 11 Unit OverspeedsProblem 12 Idle Control RPM Does Not Decrease Test 2 Check Main Circuit Breaker ProcedureTest 1 Check No-Load Voltage Frequency ResultsSet voltmeter to measure AC voltage Test 4 Fixed Excitation Test Rotor AMP DrawIf circuit breaker is good, go on to Test AC Voltage across Wires 11S and 44S= Refer to Test 4 Results chartRemove air cleaner cover to access stepper motor Set a voltmeter to measure resistanceTest 6 Wire Continuity Test 7 Check Field BoostSet volt meter to the diode test range Disconnect both wires from the Resistor R1Test 8 DIODE/RESISTOR Set volt meter to measure resistanceFrom the 50 Amp receptacle disconnect Wire Test 9 Test StatorUnplug the six pin connector at the Voltage Regulator Test 10 Sensing LeadsTest 12 Check Brush Leads Test 11 Excitation WiringGain access to the brushes and slip rings Test 13 Check Brushes & Slip RingsTest 16 Check Load Watts & Amperage Test 14 Check Rotor AssemblyTest 15 Check Load Voltage Frequency If the unit is overloaded, reduce the loadDisconnect all wires from the Battery Charge Rectifier Test 17 Check Battery Charge OutputTest 19 Check Battery Charge Rectifier BCR2 BCR1BCR2 Test 22- Check Battery & CablesTest 21- Check 10 Amp Fuse Test 24 Check Starter Contactor SC Refer back to flow chartTest 23 Check Voltage at Starter Contactor SC Test 25 Check Starter MotorChecking the Pinion Tools for Starter Performance TestTest 26 Test Starter Contactor Relay SCR Set voltmeter to measure DC voltageReconnect all wires to the switch Test 27 Check Start-Run-Stop Switch SW1Test 28 Check Start-Run-Stop Switch SW1 Wiring Procedure Set voltmeter to measure resistanceTest 30 Check Spark Plugs Refer back to the Flow ChartTest 29 Check Ignition Spark SSR and the Battery Charge Rectifier 2 BCR2 Test 31 Remove Wire 18 / Shutdown LeadRefer to Flow Chart Test 32 Test Start Stop Relay SSRTest 33 Test Wire RUNMagnetos Test 34 Test Start Stop Relay WiringTest 35 Check and Adjust Ignition Test 38 Check Fuel Pump Test 36 Test Fuel Shutoff Solenoid FSSTest 37 Test Fuel Shutoff Solenoid Voltage MagnetoTest 39 Check Carburetion Test 40 Valve AdjustmentAdjusting Valve Clearance Adjust the regulated pressure on the gauge to 80 psi 52 Tightening the Jam NutTest 42 Check Oil Pressure Switch Wire Test 43 Check Start Stop Relay SSRTest 44 Test Starter Contactor Relay SCR Test 45 Check Wire 15 CircuitTest 46 Check Wire 14 Circuit Test 47 Check Fuel Shutoff SolenoidTest 51 Check Wires 11S & 44S Test 50 Check WireTest 49 Check Wire 15B Test 48 Check HourmeterSW2 Test 52 Check Idle Control SwitchTest 53 Check Idle Control Wiring TB2Test 55 Check TR1 & TR2 Wiring Test 54 Check Idle Control Transformers ICTTest 56 Choke Test Continuity should be measuredMajor Disassembly Remove air deflector Figure B, Item #45 from cross memberSupport Alternator 3317 3026 20 22 25 QTY Description Detail of Battery Tray QTY. Description ELECTRICAL DATA RED Battery Charge Winding BA Brush Assembly Governor Actuator 167 229 15B Power Winding DPE Winding SCR Wiring Diagram 17.5 kW Drawing No G0731 Stator Closest to Bearing Electrical Schematic 17.5 kW Drawing No G0733 Circuit 11 ORG Circuit 13 DRK BLU Circuit 15 PNK ELECTRICAL DATA Page Frequency Hz 238-242 59-61 100 Rated Max DC Load Amperes Current @ 12 VoltsLoad % Torque Specifications Trim Torque SpecificationsPO BOX 297 WHITEWATER, WI

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