Miller Electric 394F Troubleshooting, Disconnect power before troubleshooting, Trouble Remedy

Page 33

8-3. Troubleshooting

 

Y Disconnect power before troubleshooting

Trouble

Remedy

Wire feeds, shielding gas flows, but

Check and secure weld cable connections (see Section 4-2).

electrode wire is not energized.

 

Electrode wire feeding stops or feeds

Check gun trigger connection. See gun Owner’s Manual.

erratically during welding.

Check gun trigger. See gun Owner’s Manual.

 

 

Readjust hub tension and drive roll pressure (see Section 4-6).

 

Change to correct size drive roll (see 4-6).

 

Clean or replace dirty or worn drive roll.

 

Incorrect size or worn wire guides.

 

Replace contact tip or liner. See gun Owner’s Manual.

 

Remove weld spatter or foreign matter from around nozzle opening.

 

Have Factory Authorized Service Agency check drive motor or motor control board PC1.

Motor runs slowly.

Check for correct input voltage.

Wire feeder power is on, displays light

Check welding gun trigger leads for continuity, and repair leads or replace gun.

up, but unit is inoperative.

 

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Contents
Processes OM-222 394FDescription File Advanced Manufacturing SystemsFrom Miller to You Table of Contents Page Marks 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 killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique un message de sécurité particulier Incendie ou une explosion LE Soudage peut provoquer unDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéSpecifications − Installation− Introduction Selecting a LocationConnection Diagram Rear Panel Connections And Rotating Drive Assembly Gun Recommendation Table Pin Network Receptacle InformationInstalling And Threading Welding Wire Power Source Display At Power Up Dual Schedule Switch OptionPower Source Upper Display Lower Display Voltage Range Operational Terms − OperationGeneral Terms Sequence Feeder Set UpPreflow StartPower Switch Left/Right Select SwitchPower Switch Jog/Purge Push Button Gun Trigger Receptacle Adjust Knob Jog/Purge switch provides the following functionsJog/Purge Front Panel Sections Program Push Button Volts Arc AdjustUpper Display Upper DisplayLower Display Feeder Set Up Push Button Adjust KnobSequence Trigger Control Trigger Hold Feeder Set Up CO2 Process Set Up Push ButtonPulse Reset ModeMild Steel Accu-pulse− Setting Sequence Parameters Sequence Parameters In a ProgramSequence Parameters Routine Maintenance − MaintenanceDiagnostics Indicates a trigger Closed errorTroubleshooting Disconnect power before troubleshootingTrouble Remedy Circuit Diagram − Electrical Diagram218 564-D 21 − Figure − Parts ListPart Description Quantity Control Box PC1 Drive Assembly, Wire -1Item Drive Assembly, WireMetric 1.2 mm1.4 mm Page Service Your distributor also givesSupport Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s
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