Lincoln Electric IM467-B manual Troubleshooting Guide, General Machine Trouble

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TROUBLESHOOTING

E-1

 

 

 

TROUBLESHOOTING GUIDE

WARNING

ELECTRIC SHOCK can kill.

Do not touch electrically live parts such as output terminals or internal wiring.

Turn the input power off at the fuse box before working on equiptment.

Only qualified personnel should perform this installation.

HOW TO USE THIS GUIDE: Carefully read through each applicable section listed below. Remember that most prob- lems are caused by improper setup, such as switch settings, control settings, electrode sizes, improper shielding gases, etc.

Observe Safety Guidelines detailed throughout this manual.

If you believe the setup is correct and the trouble still exists, first check for the obvious: input power, blown fuses, loose PC board connectors, broken wires and the like. The sections listed below are intended to help you find the less obvious sources of trouble.

General Troubleshooting

Stick Welding Trouble

TIG Welding Trouble

Lower Panel Controls Trouble

Accessory Troubles

GENERAL MACHINE TROUBLE

SYMPTOM

 

CAUSE AND REMEDY

Machine will not turn on.

1.

Input supply lines not “hot”. Check input supply line fuses.

 

 

2.

Blown control circuit fuse (F1). Replace.

 

 

3.

Thermostat (secondary) has opened. Allow machine to cool

 

 

 

before restarting.

 

 

 

 

 

Control circuit fuse (F1) keeps blowing.

1.

Machine reconnect panel hooked up for wrong voltage.

 

 

 

Connect per connection diagram in this manual.

 

 

2.

Fuse is too small. Use 1/2 amp fuse.

 

 

3.

Shorted control transformer T5. Replace.

 

 

4.

Defective Power, Meter, Control, or Protection PC board.

 

 

 

Replace PC boards one by one in this order until fuse no

 

 

 

longer blows.

 

 

 

 

 

Digital meter does not light, but welder

1.

Defective Meter PC board. Replace.

turns on as indicated by the Pilot Light

2.

Defective Control PC board. Replace.

and fan operation.

 

 

 

 

 

 

 

 

Accessories plugged into 115 volt recep-

1.

Is accessory defective? Plug it into a known “hot” receptacle

tacle do not work.

 

to check if it works.

 

 

2.

Circuit Breaker CB1 is open. Before resetting the Circuit

 

 

 

Breaker, find out why it opened. Is the accessory exceeding

 

 

 

the 15 amp maximum load? Is the accessory defective?

 

 

 

 

 

Cannot preset a current, but meter lights up.

1.

Set control knob to 12 o’clock position. Switch Start function

 

 

 

OFF. Machine should weld at approximately 80 amps. If

 

 

 

machine welds okay but ammeter does not display the weld-

 

 

 

ing current while welding:

 

 

 

a) The Meter PC board may be defective. Replace.

 

 

 

b) The Control PC Board may be defective. Replace.

 

 

2.

If machine does not weld:

 

 

 

a) Current control pot may be defective. Replace.

 

 

 

b) The Control PC board may be defective. Replace.

 

 

 

 

 

 

 

 

 

WARNING

 

 

 

 

 

 

This Troubleshooting Guide is designed to be used by the machine Owner/Operator. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For your safety, please observe all safety notes and precautions detailed in the Safety Section of this manual to avoid electrical shock or danger while troubleshooting this equipment.

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SQUARE WAVE TIG 355

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Contents Square Wave TIG Safety Electric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Thank You Table of Contents Section C Section DSection E P196 SeriesInstallation Technical Specifications Square Wave TIGSelect Suitable Location Safety PrecautionsHigh Frequency Interference Protection Input Connections Ground ConnectionInput Supply Connection Electric Shock can killReconnect Procedure Figure A.2 Input Supply ConnectionsTable A.1 Recommended Input Wire and Fuse Sizes Table A.2 Recommended Input Wire and Fuse SizesVolt/Freq Nameplate AWG Copper Cond Volt/Freq AC Output AWG Copper CondOutput Connections TIG Torch ConnectionLengths up to 100 to 200 ft 200 to 250 ft 100 ft 30 m 30 to 61 m 61 to 76 mStick Electrode Cable Connection Safety Instructions Operating InstructionsOperational Features and Controls Design Features and AdvantagesGeneral Description Recommended ProcessesWelding Capability LimitationsControls and Settings Upper Case Front ControlsMode Switch STEP/4-STEP SwitchHigh Frequency Switch Upper Case Front Control PanelVOLTS/AMPS Switch Peak Current ControlAC Wave Balance Auto Balance LEDPulse Controls Spot ControlsStart Controls Figure B.2 Status Indicator Light Sequence Square Wave TIG Crater Fill ControlsOperation Lower Case Front Controls Figure B.3 Lower Case Frontcontrols Square Wave TIGOperation Hand and Foot Amptrol Operation Operation Welding Operation Initial START-UPStick Welding TIG Welding GuidelinesIllustrated in the 2-Step Mode for clarity Table B.1 Specific Effects of ControlsCrater Fill Switch on OFFStart Switch on Pulse Switch on Crater Fill Switch onSpot Switch OFF Spot Switch onTable B.2 Typical Current RANGES1 for Tungsten ELECTRODES2 Dcen Dcep + Unbalanced Wave Balanced WaveTIG Welding Sequence Operation 2-STEP Mode TIG Welding Sequence Operation 4-STEP ModeTable B.3 Recommended Settings for TIG Welding Polarity SwitchOverload Protection Auxiliary PowerALL Machines Accessories OPTIONS/ACCESSORIESMaintenance Input Power Factor Capacitor Discharge ProcedureRoutine and Periodic Maintenance Figure D.2 General Component Locations Troubleshooting Guide General Machine TroubleTroubleshooting Guide Stick Welding Symptom Cause and RemedyTroubleshooting Guide TIG Welding TIG Welding Lower Panel Controls Accessories K870 Foot Amptrol or K963 Hand AmptrolDiagrams Dimension Print Square Wave TIG355 Equipment Installation Certification Equipment MANUFACTURER’S CertificationPage Precaucion Aviso DE