Miller Electric MW 140 Plus, H-10 Maintenance &TROUBLESHOOTING, Routine Maintenance, Months

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SECTION 7 − MAINTENANCE &TROUBLESHOOTING

7-1. 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 heavyOr service, clean

monthly.

7-2. Overload Protection

1

1 Supplementary Protector CB1

CB1 protects unit from overload. If CB1 opens, unit shuts down.

Reset supplementary protector.

802 441

7-3. Drive Motor Protection

Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun trigger and wait until protection circuit resets allowing drive motor to feed wire again.

OM-219 316 Page 22

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Contents →Description OM-219 316CProcesses 2006−10Page Table of Contents − Parts List Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer unIncendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures graves’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaquesSpecifications − SpecificationsSymbols And Definitions − DefinitionsOutput Duty Cycle % WarrantyDuty Cycle And Overheating Exceeding duty cycle canVolt-Ampere Curves AmperageIncorrect − InstallationInstalling Welding Gun CorrectProcess/Polarity Table Changing PolarityInstalling Gas Supply CO 2 gas regulator/flowmeterSelecting a Location And Connecting Input Power Do not move or operate unit where it could tipInstalling Wire Spool And Adjusting Hub Tension Installing 8 in 203 mm Wire SpoolInstalling Contact Tip And Nozzle Flux NozzleThreading Welding Wire Hold wire tightly to keep it from unraveling− Operation ControlsWeld Parameter Chart 217 618-A Overload Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Drive Motor ProtectionReplacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip To Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Does not run Troubleshooting TableTrouble Remedy − Electrical Diagram Circuit Diagram− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsThickness to Amperage a Typical MIG Process Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Waviness Of Bead Troubleshooting − DistortionCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentWire does not feed ApplicationWelding arc not stable Wire slipping in drive rolls − Parts List Main AssemblyDia Part Description Quantity Dia Part Description Quantity Mkgs H-10 Gun 195Optional Drive Rolls OptionsWarranty Owner’s Record