Multiquip LT12P, LT12D Lamp Troubleshooting Guide, Connections, Starting, Ballast Removal

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TROUBLESHOOTING

LAMP TROUBLESHOOTING GUIDE

Use the following procedure and wiring diagrams on the next pages to determine which of the four lamps is not functioning:

Connections

1.Make sure that lamp #1 power cable is plugged into the J1 connector on the T-Bar assembly.

2.Make sure that lamp #2 power cable is plugged into the J2 connector on the T-Bar assembly.

3.Make sure that lamp #3 power cable is plugged into the J3 connector on the T-Bar assembly.

4.Make sure that lamp #4 power cable is plugged into the J4 connector on the T-Bar assembly.

Starting

1.Start the generator and verify that there are no abnormal sounds.

2.Turn CB1 thru CB5 circuit breakers to the ON position.

3.Wait a few minutes and determine which lamp is not igniting.

4.If one of the lamps is OFF, disconnect its power cable and plug it into a receptacle that is known to be working. DO NOT unplug a power cable from the T-Bar while power is being supplied by the generator. Always turn the circuit breaker OFF before unplugging a power cable.

5.If the lamp still does not ignite after plugging it into a working receptacle (120 VAC present), then the lamp is defective and has to be replaced.

6.If the lamp ignites after plugging it into a working receptacle, continue with step 7.

7.With the voltmeter set to the AC position, connect the negative lead of the AC voltmeter to any (neutral) white wire on the junction terminal block.This block connects all the neutral wires (white) in the system.

8.Connect the positive lead of the voltmeter to the output side of the circuit breaker where the lamp was originally OFF and observe that 120 VAC is present. Make sure circuit breaker is ON.

9.If no output voltage is present, the circuit breaker is defective and needs to be replaced.

10.If the correct output voltage is present then it can be assumed that the generator is working correctly and the correct voltage (120 VAC) is being supplied to the ballast.Then it can be assumed that the ballast for that lamp is defective. Replace ballast.

Ballast Removal

1.Remove the power cable from the generator, and make sure that no voltage is being supplied to the ballast compartment.

2.Remove the four screws securing the ballast cover, and remove cover.

3.Make sure to discharge the ballast capacitor.

4.Remove the defective ballast, taking care to guard against electrical shock when coming in contact with the ballast and capacitor. The capacitor is known to store an electrical charge, that when discharged could result in a harmful shock. Make sure to discharge capacitor.

LT12 SERIES LIGHT TOWER • OPERATION MANUAL — REV. #12 (01/20/09) — PAGE 43

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Contents This Manual Must Accompany the Equipment AT ALL Times Models LT12D, LT12PProposition 65 Warning Nhtsa Reporting Safety DefectsSpecifications are subject to change without notice Table of ContentsSafety Messages Safety Informationfirst aid kit General SafetyLight Tower Safety fire extinguisherLamp Safety Before servicing equipment Engine SafetyTowing Safety Fuel SafetyLoading and Tie-Down on Flatbed Truck Transporting SafetyPower Cord/Cable Safety Electrical SafetyGrounding Safety Environmental Safety Battery SafetyLamp Footcandle Plot Lamp Footcandle PlotGenerator Specifications SpecificationsTrailer Specifications Engine Specifications Length Mast Stowed Position Length Mast Deployed Position DimensionsDimensions Reference Letter Description DimensionGeneral Information Major Components Control Panel Side ComponentsRear Light CONTROL/BREAKER Control PanelControl Panel Engine OIL Check Indoor InstallationInspection Before StartingFuel Check Battery CheckWipe up any spilled fuel immediately Operation in Freezing Weather Cleaning the RadiatorAIR Cleaner FAN Belt Tension CoolantLocation of Female Connectors Starting the Engine Lombardini/Deutz Engines OperationStarting the Engine Starting the Engine PerkinsRaising the Mast Mast OperationOutriggers and Support Stands Deploying the Mast to Vertical PositionMast Operation Rotating the Mast Lowering the MastStowing the Mast to Horizontal Position Turning on the LampsEmergency Shutdown Testing the 120 VAC Gfci ReceptacleApplying AN External Load Normal ShutdownFrequency MaintenanceBasic Inspection and Maintenance Inspection/MaintenanceFlushing OUT Radiator and Changing Coolant General InspectionCheck Cable Wear Changing OILServicingthe Mast RAISE/LOWER Cable System Replacing Fuel FilterRemoval from Long Term Storage StorageLower the mast to the horizontal resting position Adjustable Channel Maintenance TrailersWheel HUB Adjustment Leaf Suspension Components Leaf SuspensionGenerator Troubleshooting TroubleshootingSymptom Solution Symptom Possible Cause Solution Engine TroubleshootingEngine revolution is not Lamp Troubleshooting Lamp starts slowly ARC does not strike Defective Lamp? When switch is first Checking voltage and ballast Turned onReplacement minimizes color differences Clean fixtureBallast Removal Lamp Troubleshooting GuideConnections StartingStator LT12 Wiring Diagram S/N 902148 and belowBLK GRN WHT RED LT12 Wiring Diagram S/N 902149 to LT12 Wiring Diagram S/N 902149 to LT12 Wiring Diagram S/N 902626 and Above BLK BRN Blue RED WHT YEL GRN Perkins Engine Wiring Diagram Deutz Engine Wiring Diagram DEUTZ/LOMBARDINI Specific LT12 Control PANEL/IGNITION Wiring DiagramCommon Causes for Loss of Trailer Trailer GuidelinesTrailer Towing Guidelines Coupling to the TOW Vehicle Driving ConditionsTrailer Towing Tips Inoperable BRAKES, Lights or MirrorsTrailer VIN TAG Side View Mirrors Electrical ConnectorTOW Vehicle Suspension SystemBall Hitch Coupler Safety ChainsJackstand Coupler TypesCoupling theTrailer to theTow Vehicle Ball Coupler Lock washer and hitch frameConnecting Trailer Lights Attaching Safety ChainUncoupling the Ball Hitch Pintle Coupler and Pintle Hook Pintle Hitch CouplerUnsafe Tires, Lug Nuts or Wheels Tire SafetyCoupling Trailer to Tow Vehicle Pintle Coupler Be sure lug nuts are tight before each tow Determining Load Limit of TrailerStep Tighten lug nuts before each towTire Fundamentals Determining Load Limit of Tow Vehicle StepP indicates the tire is for passenger vehicles Table A. Speed Rating Uniform Tire Quality Grading Standards UtqgsLetter Rating Speed Rating Replacing Worn or Damaged Tires Tire Safety TipsTable B. Tire Wear Troubleshooting Tire RepairLug Nut Torque Requirements Lights and SignalsWheel Rims Wheels, Bearings and Lug NutsFigure L. Trailer to Tow Vehicle Wiring Diagram HERE’S HOW to GET Help
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