Hobart Welding Products OM-949 manual Troubleshooting, Trouble Remedy

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5-4. Troubleshooting





	Trouble				Remedy

No weld output; fan does not run.			Be sure line disconnect switch is in On position (see Section 3-8).

			Check and replace line fuses if open. Reset breakers if necessary (see Section 3-8).

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 (see Section 4-1).

Electrode freezing to work.			Increase amperage setting (see Section 4-1).

			Increase arc length.

			Use dry, properly stored electrodes.

Noise and vibration from shunt block.			Lubricate shunt block and/or tighten adjustment screws (see Section 5-2).

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Contents Description ProcessesFrom Hobart 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 sécuritéDuty Cycle Charts SpecificationsSelecting a Location Volt-Ampere CurvesVolt Model AmpsInstalling Electrode Cable and Barrel onto Electrode Holder Installing Electrode Holder And Work ClampInstalling Work Cable onto Work Clamp Removing Barrel From Elec- trode Holder150 ft 200 ft 250 ft Weld Output Cables350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Put terminalsConnecting Input Power Electrical Service GuideControls Routine Maintenance Lubricating Shunt Block And Anti-Noise AdjustmentMonths Wrapper Remove wrapper from unit Crank Handle Shunt Shaft Reinstalling Amperage Adjustment IndicatorTrouble Remedy Troubleshooting− Electrical Diagrams Welding Methods Shielded Metal Arc Welding Smaw Procedure − Welding Methods & Troubleshooting6013 7014 Electrode And Amperage Selection ChartPositioning The Electrode Holder Striking An ArcConditions That Affect Weld Bead Shape Weld Bead CharacteristicsElectrode Angle Arc LengthButt Joints Electrode Movement During WeldingLap Joints Welding TroubleshootingTee Joints PorosityExcessive Spatter Incomplete FusionLack Of Penetration Burn-Through Excessive PenetrationWaviness Of Bead DistortionStart Your Professional Welding Career Now − Parts List Dia Part Description Quantity Page Service SupportAssistance Hobart Welding Products Contact your Distributor for