Lincoln Electric SVM136-A service manual Troubleshooting Guide, Output Problems

Page 44

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-4

 

 

 

 

 

 

F-4

TROUBLESHOOTING & REPAIR

Observe Safety Guidelines

 

 

 

 

 

TROUBLESHOOTING GUIDE

detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

 

RECOMMENDED

(SYMPTOMS)

MISADJUSTMENT(S)

 

COURSE OF ACTION

 

 

 

 

 

OUTPUT PROBLEMS

 

 

Major physical or electrical damage

1. Contact your local authorized

1.

Contact the Lincoln Electric

is evident when the sheet metal

Lincoln

Electric

Field Service

 

Service Department, (216) 383-

cover(s) are removed.

Facility for technical assistance.

 

2531 or 1-800-833-9353 (WELD).

 

 

 

Machine is dead - no output - no

1. Make sure the input power

1. Check the input power switch

fan - no pilot light.

switch is ON.

 

 

 

(S1) for proper operation. See

 

2. Check the three-phase input

 

the Wiring Diagram.

 

 

 

 

voltage at the machine.

Input

2.

Check the leads associated with

 

voltage must match the rating

 

the power switch (S1) and the

 

plate and the reconnect panel.

 

control transformer (T2) for

 

3. Check

for

blown or missing

 

loose or faulty connections. See

 

 

the Wiring Diagram.

 

fuses

in

the

input

lines.

 

 

 

 

 

 

 

 

 

 

3.

Perform the Control

 

 

 

 

 

 

 

Transformer Test.

 

 

 

 

 

1. Check the three-phase input

 

 

The machine is dead - no output -

voltage at the machine.

Input

1.

Perform the Input Contactor

no fan - the pilot light is on.

voltage must match the rating

 

Test.

 

plate and the reconnect panel.

2. Check the associated leads for

 

 

 

 

 

 

 

2. Check for blown or missing

 

loose or faulty connections

 

fuses in the input lines.

 

 

between the input contactor

 

 

 

 

 

 

 

(CR1), the reconnect panel and

 

 

 

 

 

 

 

the main transformer. See the

 

 

 

 

 

 

 

Wiring Diagram.

 

 

 

 

 

 

3. Perform the Main Transformer

 

 

 

 

 

 

 

Test.

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

IDEALARC CV-400

Page 43 Page 45
Image 44
Page 43 Page 45
Contents Idealarc CV-400 Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Idealarc CV-400Lifting Safety PrecautionsLocation and Ventilation Ground Connection Input Supply ConnectionsInput Wire and Fuse Size Return toReconnect Procedure Output Connections Connect Electrode and Work Leads to Output TerminalsFigure A.5 Output Terminal Connections Connect Wire Feeders Table of Contents Operation Section Operating Instructions Safety InstructionsOperation Operational Features and Controls Design FeaturesGeneral Description Recommended ProcessesWelding Capability LimitationsControls and Settings Figure B.1 Case Front ControlsLocal Control Remote ControlWelding Operation Auxiliary Power Overload ProtectionIdealarc CV-400 Table of Contents Accessories Field Installed Options OPTIONS/ACCESSORIESFactory Installed Options Automatic Wire Feeders Connecting the NA-3 to the Idealarc CV-400Connecting the NA-5 to the Idealarc CV-400 FeederterminalAccessories Semiautomatic Wire Feeders Connecting the LN-7 to the Idealarc CV-400 Terminal StripConnecting the LN-8 or LN-9 to the Idealarc CV-400 Idealarc CV-400 Table of Contents Maintenance Safety Precautions Routine and Periodic Maintenance Return to Return to Section TOCFigure D.1 Idealarc CV-400 Table of Contents Theory of Operation Section Theory of Operation Input Line VOLTAGE, Contactor and Main TransformerOutput CONTROL, Rectification and Feedback Protective Devices Circuits Figure E.4 CV-400 Trigger and Thermal Light CircuitSCR Operation Figure E.5 SCR OperationIdealarc CV-400 Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Electric Shock can killTroubleshooting Guide Output ProblemsOutput Problems SCR/Diode Perform the SCR/Diode Bridge SCR/Diode Rectifier Bridge Test Welding Problems Materials Needed Control Transformer T2 Voltage TestDescription Test Procedure Control Transformer T2 Voltage TestRight Side View Input Contactor Test Input Contactor Test Test for Contact Continuity Figure F.4 Input Contactor Test ConnectionsMain Transformer T1 Voltage Test Main Transformer T1 Voltage Test Figure F.6 Main Secondary Lead Test Points Blank Main Transformer T1 Voltage Test Static SCR/DIODE Rectifier Bridge Test Static SCR/DIODE Rectifier Bridge Test SCR Anode Remove ANY Insulating Paint Cathode SCR Active SCR Test Active SCR Test Figure F.15 Heat Sink Test Points Figure F.16 SCR Tester Circuit and SCR Connections Maximum Output Setting no Load Normal Open Circuit Voltage WaveformTypical Output Voltage Waveform Machine Loaded Maximum Output Setting no Load Typical SCR Gate Voltage WaveformAbnormal Output Voltage Waveform Machine Loaded ONE Output SCR not FunctioningInput Contactor CR1 CLEANING/REPLACEMENT DescriptionCleaning Procedure Contactor Replacement ProcedureFAN Motor and Blade Removal and Replacement FAN Motor and Blade Removal and Replacement ProcedureSCR/DIODE Rectifier Assembly Removal and Replacement SCR/DIODE Rectifier Assembly Removal and ReplacementSCR Removal and Replacement SCR Removal and Replacement Procedure for the 1/2 Inch Wide Spring Figure F.21 1/2 Wide Leaf SpringClamping Procedure For 1/4-28 CAP Screws Clamping Procedure For 1/4-20 CAP ScrewsProcedure for Inch Wide SpringAfter Replacing the SCRs Mounting of Stud Type Diodes To Aluminum Heat Sinks Mounting of Stud Type Diodes To Aluminum Heat SinksMain Transformer Removal and Replacement Main Transformer Removal & Replacement Removal of Lift BailRemoval of Choke and TOP Iron Assembly Figure F.26 Choke RemovalReassembly of Transformer Coils Figure F.27 Epoxy MIX Application AreasFigure F.28 Coil Lead Placement Figure F.30 Primary Thermostat Location Reassembling the Main Transformer Into the Machine Reassemble the Lift BailRetest After Repair Input Idle Amps and WattsOpen Circuit Voltages Welding Output Load TestIdealarc CV-400 Electrical Diagrams Section GWiring Diagram Codes 10084, 10085 Wiring Diagram Code Control PC Board G2629-1 Layout Control PC Board G2629-1 Schematic Snubber Snubber PC Board M15370-3 Schematic Idealarc CV-400
Top Page Image Contents