Lincoln Electric SVM151-A Retest After Repair, Idle Amps, Open Circuit Voltages, Load Test

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F-60

F-60

 

 

TROUBLESHOOTING & REPAIR

RETEST AFTER REPAIR

Retest a machine:

If it is rejected under test for any reason that requires you to remove any mechanical part which could affect the machine’s electrical characteristics. OR

If you repair or replace any electrical components.

IDLE AMPS

Input Volts

Maximum Idle Amps

 

 

50 – 113 VDC

1 Amp

 

 

OPEN CIRCUIT VOLTAGES

Mode

Input Voltage

Open Circuit Voltage

 

 

 

CC Stick

72 – 113 VDC

74 – 78 VDC

CC Stick

60 – 72 VDC

Volts In + 4 VDC

CC Pipe (200 A preset)

72 – 113 VDC

73 – 78 VDC

CV Min. Preset

60 – 113 VDC

17 – 20 VDC

CV Max. Preset

60 – 113 VDC

50 – 54 VDC

 

 

 

LOAD TEST

Mode

Input Voltage

Output Amps and Volts

 

 

 

CC Stick/Gouge

60 – 113 VDC

100 Amps @ 24 VDC

CC Stick/Gouge

60 – 113 VDC

200 Amps @ 28 VDC

CC Stick/Gouge

60 – 113 VDC

350 Amps @ 34 VDC

 

 

 

FAN AS NEEDED (F.A.N.)

The fan should turn on when the machine is loaded and stay on for 50–70 seconds after the output load is removed.

MULTI-WELD 350

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Contents Multi-Weld TM 350 Arc Converter Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications MULTI-WELD 350 K1735-1Safety Precautions QUICK-CONNECT PIG-TAILSWork Connection Case GroundingFixed Parallel Operation Power Source Setup Converters Cable Size On Cable AWG mm2Table of Contents Operation Section Operation Safety InstructionsOperating Instructions Versatile Product DescriptionPortable MULTI-SYSTEM Power Source PIG-TAIL Leads and ConnectorsRecommended Equipment and Processes Distribution BOXCC Mode Stick Welding and Gouging CV Mode Wire WeldingRemote Output Control Options Input Power/ Mode Switch has three positions Front Panel ControlsRecessed Panel Controls For CC STICK/GOUGE Mode only Paralleled ConvertersTransporting and Storage of the MULTI-WELD Cable HandlingProtection Features MULTI-WELD Table of Contents Accessories Section Accessories OPTIONS/ACCESSORIESSemiautomatic Welding Accessories Connection of Lincoln Electric Wire FeedersTo Work MULTI-WELD Maintenance Section Table of ContentsSection D-1 Maintenance MaintenanceSee additional warning information throughout this manual Service Figure D.2 Major Component LocationsMULTI-WELD Table of Contents Theory of Operation Section Theory of Operation General DescriptionPower Modules and FEED- Back Figure E.3 Power Modules and FeedbackAnalog Control Power Supply Board and Weld Control Board Mode Selector and Output Controls Figure E.5 Mode Selector and Output ControlsOVER-VOLTAGE Protection Insulated Gate Bipolar Transistor Igbt Operation Pulse Width Modulation 8E-8Chopper Technology Fundamentals 70-80VDCMULTI-WELD Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityTroubleshooting Guide Power Supply Board TestPerform the DC Buss Supply Board TestSpecifications Perform the Input ContactorCoil Resistance and Supply Voltage TestInput Voltage and Resistance TestFunction Problems Tion and Adjustment Test Analog Control Power Supply Board TestSee the Digital Meter Calibra Perform the DC Buss Supply Welding Problems Troubleshooting & Repair Troubleshooting & Repair Test Description Case Cover Assembly Removal Replacement ProcedureMaterials Needed Removal Procedure Replacement ProcedurePower Module Capacitor Discharge Procedure Procedure Figure F.2 Power Module Capacitor Terminal DischargeInput Contactor Coil Resistance and Supply Voltage Test Coil Test Procedure Perform the Power Module Capacitor Discharge procedureInput Contactor Coil Resistance Supply Voltage Test Leads #303A #330Test for Contact Continuity Supply PC Board TestAnalog Control Power Supply PC Board Test Test Procedure Figure F.4 Analog Control Power Supply PC BoardPower Supply PC Board Test DC Buss Power Supply PC Board Test DC Buss Power Supply PC Board P46 P47Table F.2 DC Buss Power Supply PC Board Voltage Table Chopper PC Board Input Voltages and Resistance Test Figure F.6 Power Module Assembly Details Chopper PC Board Input Voltages Resistance TestTest Procedure for the Left Side Power Module Power Module Capacitor Discharge ProcedureScope Settings CC Mode Input Voltage Applied 75 VDCNormal Open Circuit Voltage Waveform CV Mode Output Control AT Maximum Machine Loaded to 350 Amps AT 34 Volts CC-STICK Mode Normal Weld Voltage WaveformMachine Loaded to 350 Amps AT 34 Volts CV Mode CV Mode Output Control AT Minimum Case Front Assembly Removal and Replacement DescriptionReplace the case cover Weld Control or Peripheral PC Board Removal and Replacement Figure F.8 Case Front Assembly Details Replacement Procedure Description Digital Meter Removal Procedure Lens Bezel Spacer Seal KnobOutput Control Potentiometer Removal Procedure Refer to Figure F.9Input Contactor Removal and Replacement Figure F.10 Input Contactor Assembly Details Lead #331Replacement Procedure Input Diode Removal and Replacement Figure F.11 Input Diode Assembly Details 25-27 300-324 Refer to Figure F.11FAN Motor Assembly Removal and Replacement Figure F.12 FAN Motor Assembly Details Perform the Input Diode Replacement procedure Perform the Input Diode Removal proce- durePower Capacitor Removal and Replacement Figure F.13 Power Capacitor Mounting Details Reassembly Chopper PC Board and Diode Module Removal and Replacement Chopper PC Board Removal and Replacement RemovalReplacement Refer to Figure F.14Diode Module Removal and Replacement Figure F.15 Diode Module Mounting DetailsRefer to Figure F.15 Figure F.16 Diode Module Tightening Sequence Retest After Repair Idle AmpsOpen Circuit Voltages Load TestElectrical Diagrams Table of Contents Electrical Diagrams SectionMULTI-WELD 350 Wiring Diagram Wiring Diagram MULTI-WELDSchematic Control PC Board #1 Schematic Control PC Board #2 Schematic Control PC Board #3 Schematic Control PC Board #4 Schematic Control PC Board #5 PC Board ASSEMBLY-CONTROL RESISTOR,SMD,1W,243OHMS,1%Schematic Peripheral Printed Circuit Board PC Board ASSEMBLY-PERIPHERAL PC Board Reference Description DesignatorsSchematic Power Printed Circuit Board PC Board ASSEMBLY-POWER Return to Section Return to Section TOC To Section TOCSchematic Analog Printed Circuit Board PC Board ASSEMBLY-ANALOG Schematic BY-PASS Printed Circuit Board PC Board Assembly BY-PASS Schematic Chopper Printed Circuit Board 19303 MPC Board Assembly Chopper SVM Error Reporting Form