Miller Electric 340, 440 manual Maintenance and Troubleshooting, Routine Maintenance, Months

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SECTION 4 – MAINTENANCE AND TROUBLESHOOTING

4-1. Routine Maintenance

Y Disconnect power before maintaining.

3 Months

Replace unreadable labels.

Repair or replace cracked weld cable.

Clean and tighten weld terminals.

6 Months

Blow out or vacuum inside. During heavy service clean monthly.

OR

4-2. Troubleshooting

 

 

 

 

 

 

 

 

 

 

 

Trouble

 

 

Remedy

 

 

No weld output; fan does not run.

Be sure line disconnect switch is in On position.

 

 

 

 

 

Check and replace line fuses if open. Reset breakers if necessary.

 

 

Fan does not run; weld output okay.

Be sure nothing is blocking movement of fan. If fan does not run freely, replace fan motor.

 

 

Erratic weld current.

Clean and tighten all weld cable connections.

 

 

Erratic arc with excessive spatter.

Use dry, properly stored electrodes.

 

 

 

 

 

Shorten arc length.

 

 

 

 

 

Reduce amperage setting.

 

 

Electrode freezing to work.

Increase amperage setting.

 

 

 

 

 

Increase arc length.

 

 

 

 

 

Use dry, properly stored electrodes.

 

 

 

 

 

OM-193 696 Page 9

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Contents Description ProcessesFrom Miller to You Table of Contents Standards DirectivesMarks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards About Pacemakers EMF InformationSpecifications InstallationDuty Cycle and Overheating Positioning Jumper Links Volt-Ampere CurvesSelecting a Location and Connecting Input Power Electrical Service GuideControls OperationRoutine Maintenance Maintenance and TroubleshootingTroubleshooting Disconnect power before maintainingBluthunder 340/440 230V Electrical DiagramBluthunder 340/440 400V Main Assembly Parts ListMachine 400/520 Dia Code Dwg Dia Code Dwg60100 160 Amp PRI. Coil Page Page Page Effective January 1 Miller Electric Mfg. Co Owner’s Record