Hobart Welding Products 187 manual Troubleshooting Table, Trouble Remedy

Page 32

7-7. Troubleshooting Table

 

 

 

 

 

 

 

 

 

 

 

 

 

Trouble

 

 

Remedy

 

 

No weld output; wire does not feed; fan

Secure power cord plug in receptacle (see Section 5-7).

does not run.

 

 

 

Replace building line fuse or reset circuit breaker if open.

 

 

 

 

 

 

 

 

 

 

Place Power switch in On position (see Section 6-1).

 

 

 

 

 

 

 

Reset welding power source supplementary protector (see Section 7-2).

 

 

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 4-2).

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

Secure gun trigger leads (see Section 5-2).

 

 

No weld output; wire feeds.

Connect work clamp to get good metal to metal contact.

 

 

 

 

 

 

 

Replace contact tip (see Section 7-5).

 

 

 

 

 

 

 

Check for proper polarity connections (see Section 5-5).

 

 

 

 

 

 

 

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

 

 

Wire does not feed; wire is not ener-

Check contact tip. Check for kinks in gun cable and liner.

gized; wire feeds unevenly.

 

 

 

Check gun trigger plug connection at welding power source/wire feeder.

 

 

 

 

 

 

 

 

 

 

Check, and if necessary, replace gun trigger switch (see Section 7-6).

 

 

 

 

 

 

 

Check contact tip. Check for kinks in gun cable. Blow out liner and gun casing (see Section 7-5).

 

 

Low weld output.

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

 

 

 

 

 

 

 

Place voltage switch in desired position (see Section 6-1).

 

 

Electrode wire feeding stops during

Straighten gun cable and/or replace damaged parts.

welding.

 

 

 

Adjust drive roll pressure (see Section 5-10).

 

 

 

 

 

 

 

 

 

 

Change to proper drive roll groove (see Section 7-4).

 

 

 

 

 

 

 

Readjust hub tension (see Section 5-9).

 

 

 

 

 

 

 

Be sure that wire is positioned in proper drive roll groove and wire is laying in the groove.

 

 

 

 

 

 

 

Replace contact tip if blocked (see Section 7-5).

 

 

 

 

 

 

 

Clean or replace wire inlet guide or liner if dirty or plugged (see Section 7-4or Section 7-5).

 

 

 

 

 

 

 

Replace drive roll or pressure bearing if worn or slipping (see Section 7-4).

 

 

 

 

 

 

 

Secure gun trigger leads or repair leads (see Section 5-2).

 

 

 

 

 

 

 

Check and clear any restrictions at drive assembly and liner (see Section 5-10or Section 7-5).

 

 

 

 

 

 

 

Release gun trigger and allow gun and motor protection circuitry to reset (see Section 7-3).

 

 

 

 

 

 

 

Gun is not secured to feed head. Check thumbscrew securing gun end to feed head adapter and tighten

 

 

 

if necessary.

 

 

 

 

 

 

 

Have nearest Factory Authorized Service Agent check drive motor.

 

 

Weld porosity.

Remove weld spatter buildup in nozzle.

 

 

 

 

 

 

 

Check O-rings on gun connector and replace if damaged.

 

 

 

 

 

 

 

Make sure inner head tube is tight in cable connector.

 

 

 

 

 

 

 

Check gun connector to be sure it is fully inserted into drive assembly.

 

 

 

 

 

 

 

Check shielding gas flow/supply.

 

 

 

 

 

 

OM-228 187 Page 28

Image 32
Contents OM-228 187B ProcessesDescription 2010−01From Hobart to You Protect Your InvestmentTable of Contents − Parts List Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can burnFumes 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 injure Fire or Explosion hazardFalling Equipment can injure Moving Parts can injurePrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortLE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peuvent être dangereux LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresProposition californienne 65 Avertissements Les Pièces Mobiles peuvent causer des blessuresLES Fils DE Soudage peuvent provoquer des blessures LE Soudage À L’ARC risque de provoquer des interférencesEn ce qui concerne les implants médicaux Principales normes de sécuritéInformations relatives aux CEM OM-228 187 − Specifications Symbols And DefinitionsSpecifications − DefinitionsDuty Cycle And Overheating Volt-Ampere CurvesAmperes OutputInstalling Welding Gun − InstallationInstalling Nozzle, Contact Tip, And Adapter Installing Work Clamp Changing Polarity Turn off welding power sourceProcess/Polarity Table Installing Gas Supply Selecting a Location And Connecting Input Power Electrical Service Guide Installing Wire Spool And Adjusting Hub TensionThreading Welding Wire Hold wire tightly to keep it from unraveling− Operation ControlsOM-228 187 Weld Parameter Chart CFH227010 − Maintenance & Troubleshooting Routine MaintenanceOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Thread wire according to Replacing Switch And/Or Head Tube Troubleshooting Table Trouble RemedyOM-228 187 − Electrical Diagram Circuit Diagram228 180-A − MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsSelect Voltage Typical MIG Process Control SettingsWire Size Amperage Range Holding And Positioning Welding Gun Groove WeldsConditions 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 − Parts List Main AssemblyDia Part Description Quantity 228 H100S2-10 Gun 245Optional Drive Rolls OptionsAssistance ServiceSupport Contact your Distributor for Hobart Welding Products