Hobart Welding Products OM-925 217 694A manual Troubleshooting Table, Trouble Remedy

Page 32

6-8. Troubleshooting Table

 

 

 

 

 

 

 

 

 

 

 

Trouble

 

 

Remedy

 

 

No weld output; wire does not feed; fan

Secure power cord plug in receptacle (see Section 4-6).

does not run.

 

 

 

Replace building line fuse or reset circuit breaker if open.

 

 

 

 

 

 

 

Place Power switch in On position (see Section 5-1).

 

 

 

 

 

Reset welding power source circuit breaker if open.

 

 

No weld output; wire does not feed; fan

Thermostat TP1 open (overheating). Allow fan to run with gun trigger switch off; thermostat closes when

motor continues to run.

unit has cooled (see Section 3-2).

 

 

 

 

 

Check Voltage range switch position. Rotate knob until it “clicks” into detent at desired range setting.

 

 

 

 

 

Voltage range switch set in “PURGE” position. Set switch to position 1, 2, 3, or 4.

 

 

 

 

 

Secure gun trigger leads (see Section 4-1).

 

 

No weld output; wire feeds.

Connect work clamp to get good metal to metal contact.

 

 

 

 

 

Replace contact tip (see Section 6-5).

 

 

 

 

 

Check for proper polarity connections (see Section 4-4).

 

 

 

 

 

Check thumbscrew securing gun end to feed head adapter and tighten if necessary.

 

 

Low weld output.

Connect unit to proper input voltage or check for low line voltage.

 

 

 

 

 

Place voltage switch in desired position (see Section 5-1).

 

 

Electrode wire feeding stops during

Straighten gun cable and/or replace damaged parts.

welding.

 

 

 

Adjust drive roll pressure (see Section 4-10).

 

 

 

 

 

 

 

Change to proper drive roll groove (see Section 6-4).

 

 

 

 

 

Readjust hub tension (see Section 4-9).

 

 

 

 

 

Replace contact tip if blocked (see Section 6-5).

 

 

 

 

 

Clean or replace wire inlet guide or liner if dirty or plugged (see Section 6-4or Section 6-6).

 

 

 

 

 

Replace drive roll or pressure bearing if worn or slipping (see Section 6-4).

 

 

 

 

 

Secure gun trigger leads or repair leads (see Section 4-1).

 

 

 

 

 

Check and clear any restrictions at drive assembly and liner (see Section 4-10or Section 6-6).

 

 

 

 

 

Release gun trigger and allow gun and motor protection circuitry to reset.

 

 

 

 

 

Have nearest Factory Authorized Service Agent check drive motor.

 

 

 

 

 

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Contents Description OM-925Processes From Hobart to You Table of Contents Options and Accessories Warranty Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLE Soudage peut causer un incen- die ou une explosion LES Particules Projetées peu- vent blesser les yeuxLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Bruit peut affecter l’ouïeRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut Faire LES Pièces Mobiles peuvent cau- ser des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques VAC Model − SpecificationsSpecifications Duty Cycle And Overheating AmperesOutput Duty Cycle % VAC Model Output AmperesVolt-Ampere Curves Voltage− Installation Installing Welding Gun Installing Work ClampProcess/Polarity Table Changing PolarityInstalling Gas Supply Is required Do not move or operate unit where it could tip = GND/PEElectrical Service Guide For 230 VAC Model Installing Wire Spool And Adjusting Hub TensionThreading Welding Wire Hold wire tightly to keep it From unraveling− Operation ControlsWeld Parameter Chart For 115 VAC Model Steel20 ga 18 ga 16 ga 11 ga InchWeld Parameter Chart For 230 VAC Model Wire Welding Package 18 ga 16 ga 11 ga 048 060 Inch− Maintenance &TROUBLESHOOTING Routine MaintenanceDisconnect power before maintaining Overload Protection Drive Motor Protection Replacing Gun Contact Tip Changing Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tip To Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit Diagram For 115 VAC ModelCircuit Diagram For 230 VAC Model − MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsTypical MIG Process Control Settings Wire Size Amperage RangeThickness to Amperage a 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 Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Waviness Of Bead Troubleshooting − DistortionApplication Troubleshooting Guide For Semiautomatic Welding EquipmentCommon MIG Shielding Gases Welding arc not stable Wire slipping in drive rolls Return To Table Of Contents − Parts List Main AssemblyDia Part H-10 Gun 195 Optional Drive RollsOptions Page Service SupportContact your Distributor for Hobart Welding Products
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