Miller Electric NT 450, NT 500 manual Maintenance & Troubleshooting, Routine Maintenance, Fuse F1

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SECTION 6 − MAINTENANCE & TROUBLESHOOTING

6-1. Routine Maintenance

! Disconnect power before maintaining.

. Maintain more often during severe conditions.

n = Check	Z = Change	~ = Clean	Δ = Repair	l = Replace
* To be done by Factory Authorized Service Agent

Every 3 Months

nl Labels

n~ Weld Terminals

Every 3 Months

nΔ lCables And Cords

Every 6 Months

~:Durning heavy service, clean monthly.

6-2. Fuse F1

! Disconnect input power be- fore opening rear access door.

1Fuse F1 (See Parts List For Rating)

Fuse F1 protects control transform- er from overload. If F1 opens, weld output and fan motor stops. Re- place F1.

Close door when finished.

Tools Needed:

3/8 in

Ref. 800 101-C

OM-2252 Page 24

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Contents OM-2252218 084R ProcessesDescription File Multiprocess WeldingFrom Miller to You Table of Contents Page Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-2252 General Precautionary Label − DefinitionsNameplate Safety Symbols Input Connection LabelElectric Shock And Airflow Label ? aSpecifications − InstallationDuty Cycle And Overheating CC Mode CV ModeVolt-Ampere Curves 100 200 300 400 500 600Selecting a Location Movement460 mm 460 mm OM-2252Dimensions And Weights DimensionsWeight 376 lb 171 kg Holes EFrontDo not move or operate unit where it could tip Turn Off power before connecting to receptacleTipping VAC Receptacle And Circuit BreakersConnecting Weld Output Cables Weld Output Terminals And Selecting Cable SizesConnecting Remote Control Turn off power before conRemote 14 Receptacle Information SocketElectrical Service Guide Placing Jumper Links Connecting Input Power Welding Power Source Input Power Connections Disconnect Device Input Power Connec- tions = GND/PE Earth Ground− Operation ControlsLift-Arc TIG Procedure For CC/CV Models Meter Functions For CC/CV Models− Maintenance & Troubleshooting Routine MaintenanceDisconnect power before maintaining Disconnect input power be- fore opening rear access doorHelp 3 Display Voltmeter/Ammeter Help DisplaysHelp 7 Display Troubleshooting Trouble RemedyWork like a Pro − Electrical Diagram Circuit Diagram For Dimension NT218 081-F − Parts List Main AssemblyTHERMISTOR, NTC 10K OHM @ 25 DEG C 34IN Lead Panel, Front With Components 264Panel, Front With Components -1Item IGBT/Capacitor Assembly IGBT/Capacitor Assembly -1item 221Panel, Rear With Components Page Work like a Pro Your distributor also gives ServiceSupport To locate a Distributor or Service Agency visit Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s