Hobart Welding Products 500 manual Overload Protection, Troubleshooting Table, Trouble Remedy

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5-2. Overload Protection

1 Circuit Breaker CB1

CB1 protects the welding power source control circuit from over- load. If CB1 opens, weld output drops to the minimum of the range selected.

Press button to reset circuit break- er.

1

Ref. ST-800 040

5-3. Troubleshooting Table

Trouble

Remedy

 

 

No weld output; unit completely

Place line disconnect switch in On position (see Section 3-12B).

inoperative.

 

 

 

 

Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-12B).

 

 

 

Check for proper input power connections (see Section 3-12B).

 

 

 

Check for proper jumper link position (see Section 3-12A).

 

 

No weld output.

Clean and tighten all weld connections (see Section 5-1).

 

 

Unit provides only low or minimum

Check for proper line voltage.

weld output.

 

Check for open line fuse(s), and replace if necessary. Check and replace circuit breakers (see Sec-

 

 

tion 3-12B).

 

 

 

Clean and tighten all weld connections (see Section 5-1).

 

 

 

Place Remote Amperage switch in correct position (see Section 4-3).

 

 

 

Select correct size weld cables (see Section 3-8).

 

 

Low weld amperage; Amperage Ad-

Reset circuit breaker CB1, if necessary (see Section 5-2).

justment does not control amperage.

 

 

 

Maximum weld output.

Have Factory Authorized Service Agent check Amperage Adjustment control.

 

 

Erratic or improper weld output.

Check for proper input power connections.

 

 

 

Clean and tighten all weld connections (see Section 5-1).

 

 

 

Use proper size and type electrodes.

 

 

Excessive line current or line fuse(s)

Check for proper input power connections (see Section 3-12B).

open repeatedly.

 

Check for proper jumper link position (see Section 3-12A).

 

 

 

Fan not operating and/or over heating.

Check for and remove anything blocking fan movement.

 

 

 

Replace fan motor, if necessary.

 

 

OM-201 444 Page 23

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Contents OM-201 ProcessesDescription From Hobart to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesPrincipal Safety Standards About Pacemakers EMF InformationLES Fumé ES ET LES GAZ peuvent ê tre dangereux Signification des symbolesConsignes DE Securite Lire Avant Utilisation UN Choc É Lectrique peut tuerLE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxLE Bruit peut affecter l’ouïe DES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peutPrincipales normes de sé curité Information sur les champs é lectromagné tiquesConsignes relatives aux stimulateurs cardiaques Definitions General Precautionary Label? a Nameplate Safety SymbolsInput Connection Label Electric Shock And Airflow LabelSymbols And Definitions Manufacturer’s Rating Labels For CE Products60-550A Installation SpecificationsDuty Cycle And Overheating Movement Location And Airflow Volt-Ampere Curves Selecting a LocationDimensions And Weights Be careful when placing or moving unit over uneven surfacesTipping Selecting And Preparing Weld Output Cables 45 m 60 m 70 m 90 m 105 m 120 m Connecting To Weld Output TerminalsWeld Cable Sizes 150 ft 200 ft 250 ft 300 ft 350 ftRemote Amperage Control Receptacle Electrical Service GuidePlacing Jumper Links Connecting Input PowerConnecting Input Power Amperage Adjustment Control OperationControls Power Switch Remote Amperage SwitchAmmeter And Voltmeter Optional Maintenance & TroubleshootingRoutine Maintenance Disconnect power before maintaining MonthsTroubleshooting Table Overload ProtectionTrouble Remedy Circuit Diagram Electrical DiagramOM-201 444 Main Assembly Parts ListParts For Optional Equipment Panel, Front w/Components -1 Item Panel, Rear w/Components -1 Item Transformer & Amplifier, Power Main 50 Hz Support ServiceHobart Welding Products Contact your Distributor for