Miller Electric 250 manual Overload Protection, Component Panel Stop engine, Fuse F1

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.A complete Parts List is available at www.MillerWelds.com

9-5. Overload Protection

Tools Needed:

3/8 in

Component Panel

! Stop engine.

.When a circuit breaker or fuse

opens, it usually indicates a more serious problem exists. Contact a Factory Authorized Service Agent.

1 Fuse F1

F1 protects the weld excitation winding from overload. If F3 opens, weld output stops or is low.

2 Fuse F2

F2 protects the generator power excitation winding from overload. If F4 opens, generator power output stops or is low.

3 Circuit Breaker CB7

CB7 protects the engine glow plug circuit. If CB7 opens, the glow plug will not heat. CB7 automatically re- sets when the fault is corrected.

4 Supplementary Protector CB8

CB8 protects the engine battery cir- cuit. If CB8 opens, the engine will not crank. CB8 automatically re- sets when the fault is corrected.

Replace any open fuses. Close door and/or reinstall cover before operating unit.

804 253-A / Ref 804 250-A

OM-217 455 Page 38

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Contents Visit our website at OM-217 455HFile Engine Drive 2007−05−21From Miller to You Table of Contents 13-4 13-213-3 13-5Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burnsARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosionEngine Hazards Compressed Air HazardsFire or Explosion hazard Welding Wire can cause injuryHOT Parts can cause burns and injury Falling Unit can cause injuryEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings Radiation can cause interferenceUN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiquesDES Pièces Chaudes peuvent provoquer des brûlures graves LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut affecter l’ouïe ’EXPLOSION DE LA Batterie peuDES Organes Mobiles peuvent pro voquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie ’AIR Comprimé peut provoquer des blessuresRisque D’INCENDIE OU D’EXPLO- Sion LES Fils DE Soudage peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures ’EMPLOI Excessif peutInformation EMF Proposition californienne 65 AvertissementsPrincipales normes de sécurité En ce qui concerne les implants médicauxWeld, Power, and Engine Specifications − SpecificationsSymbol Definitions − DefinitionsDimensions, Weights, and Operating Angles Dimensions For Units With Optional Running GearDimensions Vehicle frame. Always connect a ground wire − InstallationInstalling Welding Generator Mounting+ − Installing Exhaust PipeConnecting the Battery Stop engine and let coolOverview And Engine Prestart Checks Run-in period first 100 hours Engine Left Side Engine Right SideStarting engine for the first time Daily pre-start checksWork Weld Output Terminal Connecting to Weld Output TerminalsCorrect Installation Tools Needed Do not placeSelecting Weld Cable Sizes − Operating the Welding Generator Engine Control SwitchesPlace switch in Run position to operate most MIG equipment Do not use glow plugs longer than 20 secondsWeld Output Controls Stop engine Typical Stick Welding Connections And Control SettingsTypical Settings For 7018 1/8 Electrode Work Clamp Electrode HolderSet Weld Process Selector switch to Wire + position Typical MIG Welding Connections And SettingsSet Weld Process Selector switch to Wire + Dcep position Set Weld Process Selector switch to Wire − position DcenTools Needed 3/4 Work Not Used To Work Left Side View At least once a month, run engine at Generator Power Receptacles− Operating Auxiliary Equipment To verify Gfci is working properlySimultaneous Weld And Power − Operating Optional Battery Charger Battery Charge ControlsDetermining Battery Charging Current Battery Charge Cable Connections Battery Charging Procedure MinutesStart Your Professional Welding Career Now − Maintenance and Troubleshooting Routine MaintenanceMaintenance Label And Engine Maintenance Activities Stop engine and let cool Oil And Fuel804 197-A / Ref 803 111-A / 227 Air cleaner primary element can Cleaner or with dirty element. EngineMent is not covered by the warranty Damage when determining whetherStop screw is factory-set and should not be adjusted Adjusting Engine SpeedAdjusting Fuel Solenoid Position Checking Fuel Solenoid16 mm Adjusting Throttle SolenoidChecking Throttle Solenoid Check for non-bindingMaking Engine Speed Adjustments Adjusting Idle SpeedAdjusting Weld/Power Speed Fuse F1 Overload ProtectionComponent Panel Stop engine Supplementary Protector CB8Welding Troubleshooting TablesGenerator Power Trouble RemedyMaintenance Display Action EngineRecommended Spare Parts − Parts ListRecommended Spare Parts Current transformer CT1, and throttle solenoid TS1− Electrical Diagrams Circuit Diagram For Welding Generator228 719-B OM-217 455 231 607-B − RUN-IN and Wetstacking Run-In And WetstackingUS Gal./Hr − Performance DataFuel Consumption Curves IdleVolts Generator Power CurveDuty Cycle AC Amperes At 120 VoltsStick Mode Volt-Ampere Curves DC Amps CC/AC Stick Mode AC VoltsAC Amps MIG Mode Volt-Ampere Curve DC Amps− Generator Power Guidelines Selecting EquipmentGrounding Generator To Truck Or Trailer Frame Use ground device as stated in electrical codes Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Amperes x Volts = WattsIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Stick Welding Procedure Weld current starts when electrode touches work- piece− Stick Welding Smaw Guidelines Electrode and Amperage Selection Chart Striking an Arc − Scratch Start TechniqueStriking an Arc − Tapping Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 10-30 9090 End View of Work AngleConditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint 16 in 30 1.6 mm Tack WeldsWeld Test Troubleshooting − PorosityTroubleshooting − Excessive Spatter Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Excessive Penetration Troubleshooting − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Work like a Pro Service Your distributor also givesSupport For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s