Lincoln Electric SVM207-A service manual Perform the Output Bridge Test

Page 43

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-5

TROUBLESHOOTING AND REPAIR

F-5

 

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

OUTPUT PROBLEMS

 

 

No weld output in AC or DC Modes.

1.

Check

the

welding

cables,

1. Disconnect lead W1 from the

The auxiliary power (480, 23 &

 

clamps and electrode holder for

Output Bridge (D1) and check

115VAC) is normal. Engine runs

 

loose or broken connections.

for the presence of 80VAC from

normally.

2.

Check

the open circuit

voltage

lead W1 to lead W2 on the main

 

stator winding. See the Wiring

 

 

(OCV) at the welder output termi-

 

 

Diagram.

If the AC voltage is

 

 

nals, engine

at high idle (3650

 

 

NOT present, the winding in the

 

 

RPM). Normal maximum is 73 to

 

 

stator may be faulty. Check the

 

 

80VAC. Normal DC maximum is

 

 

winding for continuity and test to

 

 

67 to 72VDC. If the OCV is OK

 

 

be sure it is NOT grounded to

 

 

then proceed to Step #2.

 

 

 

 

the stator iron. Replace the

 

 

 

 

 

 

 

 

 

 

 

 

Sstator if necessary. If the cor-

 

 

 

 

 

 

rect AC voltage is present, pro-

 

 

 

 

 

 

ceed to step #2.

 

 

 

 

 

 

2. Check the Reactor, Range

 

 

 

 

 

 

Switch (S1) and associated

 

 

 

 

 

 

wires for loose or faulty connec-

 

 

 

 

 

 

tions. Check the reactor wind-

 

 

 

 

 

 

ing for continuity and test to be

 

 

 

 

 

 

sure it is NOT grounded to the

 

 

 

 

 

 

reactor iron.

 

 

 

 

 

 

3. Check the Choke (L1), Polarity

 

 

 

 

 

 

Switch (S2) and associated

 

 

 

 

 

 

wires for loose or faulty connec-

 

 

 

 

 

 

tions. Check the choke winding

 

 

 

 

 

 

for continuity and test to be sure

 

 

 

 

 

 

it is NOT grounded to the choke

 

 

 

 

 

 

iron.

 

 

 

 

 

 

 

4. Check the weld output terminals

 

 

 

 

 

 

and associated wires for loose

 

 

 

 

 

 

or faulty connections.

 

 

 

 

 

 

5. Perform the Output Bridge

 

 

 

 

 

 

Test.

 

 

 

 

 

No DC welding output. AC welding

1.

Make sure the Polarity Switch is

1. Perform the Output Bridge Test.

output and auxiliary power is nor-

 

in the proper position and is

2. Check the

Choke (L1), the

mal.

 

 

“seated” correctly.

 

Polarity Switch (S2) and associ-

 

 

 

 

 

 

 

2. Make

sure

the electrode and

ated wires for loose or faulty

 

 

polarity are correct for the

connections. Check the choke

 

 

process being used.

 

winding for continuity and test to

 

 

 

 

 

 

be sure it is NOT grounded the

 

 

 

 

 

 

choke iron.

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

RANGER® 3 PHASE

Page 42 Page 44
Image 43
Page 42 Page 44
Contents Ranger 3 Phase Ranger 3 Phase SafetyFumes and Gases Welding Cutting Précautions DE Sûreté Safety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Height Width Depth Weight InstallationTechnical Specifications Ranger 3 Phase K2337-1 & K2337-2 Auxiliary PowerTowing Safety PrecautionsMachine Grounding Spark ArresterCan cause fire or explosion PRE-OPERATION ServiceGasoline Vehicle MountingAngle of Operation Welding Output CablesTotal Combined Length of Electrode and Work Cables High Altitude OperationInstructions 120/240 Volt Dual Voltage Receptacle Auxiliary PowerVolt 3 Phase Receptacle with Ground Gfci Duplex ReceptaclesTABLE A.1 Simultaneous Welding and Power Ground WireStandby Power Connections Auxiliary Power While WeldingFigure A.3 Connection of Ranger 3 Phase to Premises WiringUSE These Devices with a Ranger 3 Phase Electrical Device USE with the Ranger 3 PhaseDevices Without Addi Tional Resistive Type Loads Table of Contents Operation Section Welder Controls Function and Operation Engine SwitchOperation GENERAL DESCRIPTIONControl Dial Polarity SwitchRanger 3 Phase Approximate Fuel Consumption Range SwitchTIG Constant Current Welding Wire Feed Welding Processes Constant VoltageWelding Process Stick Constant Current WeldingStick Auto Stopping the Engine STARTING/SHUTDOWN InstructionsBREAK-IN Period Starting the EngineTable of Contents Accessories Section K1745-1 Welding GAS Cylinder LPG Tank Holder AccessoriesTIG WIRE FEEDRECOMMENDED EQUIPMENT StickRanger 3 Phase Table of Contents Maintenance Section Safety Precautions MaintenanceDo not attempt to polish slip rings while engine is running Gfci Receptacle Testing and RESET- Ting ProcedureAIR Cleaner and Other Maintenance Slip Rings OIL Filter ChangeCHAMPION RC12YC BatteryEngine Maintenance Parts KOHLER C23S Fram CA79Figure D.1 Major Component Location MAINTENANCED-5Ranger 3 Phase 1TABLE of CONTENTS-THEORY of Operation Section E-1 General Description Theory of OperationEngine Components and Operation Figure E.2 ROTOR, Stator and Control Circuits ROTOR, Stator & Control CircuitsFigure E.2 Weld Circuitry Weld Circuitry1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and RepairReturn to Section PC Board Troubleshooting ProceduresDiagram Perform the Output Bridge Test Gram Wiring Wiring Diagram Troubleshooting and Repair Figure F.4 and/or the Wiring Test Description Rotor Voltage Test ProcedureMaterials Needed Rotor Voltage Test Test ProcedureRotor Resistance Test Figure F.2 Slip Rings TEST PROCEDUREAuxiliary and Field Winding Test To test the 120 VAC winding To test the 480 VAC 3 Phase windingProbes Reading Auxiliary WindingsField Winding Figure F.4 Control PC BoardRanger 3 Phase Output Rectifier Bridge Test + Meter Lead Meter Reading Figure F.5 OUTPUT RECTIFIERToroid Test Toroid Test Charging Circuit Test Voltage Regulator AC Lead DC Lead Engine Throttle Adjustment Test Engine Throttle Adjustment Test Low Idle Adjustment SolenoidNut Housing Figure F.9 115VAC Supply Waveform High IDLE- no Load Normal Open Circuit Voltage Waveform 115 VAC Supply Scope SettingsHigh Idle no Load Output Control AT Maximum Machine Loaded Typical DC Weld Output Waveform CV ModeMachine Loaded to 200 Amps AT 26 VDC Typical DC Weld Output Waveform CC ModeMachine Loaded to 225 Amps AT 25 VDC Typical AC Weld Output WaveformAbnormal Open Circuit Weld Voltage Waveform CV Mode Abnormal Open Circuit DC Weld Voltage Waveform Normal Open Circuit Weld Voltage Waveform CV Mode Normal Open Circuit DC Weld Voltage Waveform CC Mode Normal Open Circuit AC Weld Voltage Waveform Ranger 3 Phase Brush Removal and Replacement Procedure Procedure Brush Removal and Replacement ProcedureBrush Assembly Bracket Bolts Ranger 3 Phase Printed Circuit Board Removal Replacement Procedure Figure F.10 Door Removal Printed Circuit Board RemovalOutput Rectifier Bridge Removal Replacement Procedure Figure F.11 OUTPUT RECTIFIER Output Rectifier Bridge RemovalENGINE/ROTOR Removal and Replacement Procedure ENGINE/ROTOR Removal and Replacement Procedure Procedure Figure F.13 Engine and Rotor Removed from Stator Rotor Removal ProcedureReassembly Procedure Retest After Repair Table of Contents Diagram Section RaNGEr 3 phaSE Ranger 3-PHASEL12259 SchEmaTic cOmplETE machiNE l12259ElEcTrical DiaGramS
Top Page Image Contents