Miller Electric HF-251-2, HF-251D-1 manual Troubleshooting, Trouble Remedy

Page 23

5-3. Troubleshooting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trouble

Remedy

 

 

 

 

 

 

Unit completely inoperative; Pilot light

Secure input power cord plug in receptacle (see Section 3-8).

Off.

 

 

 

 

 

 

 

 

 

 

 

 

Place Power switch in the On position (see Section 4-5).

 

 

 

 

 

 

Lack of high-frequency; difficulty in es-

Place High Frequency Selector Switch in the correct position (see Section 4-3).

tablishing an arc.

 

 

 

 

 

 

 

 

 

 

 

 

Be sure torch cable is not close to any grounded metal.

 

 

 

 

 

 

 

 

 

 

 

Check cables and torch for cracked insulation or bad connections. Repair or replace necessary parts.

 

 

 

 

 

 

 

 

 

 

 

Increase setting of High Frequency Intensity Control (see Section 4-4).

 

 

 

 

 

 

 

 

 

 

 

Select proper size tungsten (see Section 8-1).

 

 

 

 

 

 

 

 

 

 

 

Check spark gaps and adjust if necessary (see Section 5-2).

 

 

 

 

 

 

Wandering arc − poor control of direction

Reduce gas flow rate (see Section 3-3).

of arc.

 

 

 

 

 

 

 

 

 

 

 

 

Select proper size tungsten (see Section 8-1).

 

 

 

 

 

 

 

 

 

 

 

Properly prepare tungsten (see Section 8-2).

 

 

 

 

 

 

 

 

 

 

 

Increase setting of High Frequency Intensity Control (see Section 4-4).

 

 

 

 

 

 

Tungsten electrode oxidizing and not re-

Shield weld zone of drafts.

maining bright after conclusion of weld.

 

 

 

 

 

 

 

 

 

 

 

 

Check and tighten all gas fittings (see Section 3-3).

 

 

 

 

 

 

 

 

 

 

 

Properly prepare tungsten (see Section 8-2).

 

 

 

 

 

 

 

 

 

 

 

Replace torch parts if water has leaked into torch.

 

 

 

 

 

 

Return To Table Of Contents

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Contents
Description OM-611Processes From Miller 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 eyesCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information − Consignes DE Sécurité − À Lire Avant Utilisation Identifie un message de sécurité particulierLE Bruit peut affecter l’ouïe LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LES Pièces Chaudes peuvent cau- ser des brûlures gravesLES Pièces Mobiles peuvent cau- ser des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut FaireConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques Typical Process Connections − InstallationSpecifications IN-GAS-OUT Installing Gas SupplyAmperage Control Power Source Plug Information And ConnectionsSocket Operator Control Receptacle Information And ConnectionsOperator Control Receptacle Socket Information Electrode Electrode OUT Work INPUT/OUTPUT Connecting To Weld Output TerminalsConnecting Input Power Controls High Frequency SwitchHigh Frequency Selector Switch − OperationShielding Gas Power Switch And Pilot LightPostflow Timer High Frequency Intensity ControlRoutine Maintenance Months − Maintenance & TroubleshootingAdjusting Spark Gaps Trouble Remedy TroubleshootingCircuit Diagram For 115 Volts Model − Electrical DiagramsCircuit Diagram For 230 Volts Model Weld Zone Incorrect Installation− High Frequency Welding Processes Requiring High FrequencyMetal Building Requirements Correct InstallationMetal Building AC − Argon AC − Argon − Amperage Range Gas Type PolarityPreparing Tungsten For Conventional AC Welding − Guidelines for TIG Welding GtawPreparing Tungsten Electrode For Welding Positioning The TorchTungsten With Filler Rod Torch Movement During WeldingPositioning Torch Tungsten For Various Weld Joints Tungsten Without Filler RodReturn To Table Of Contents Complete Assembly Part 1 of 2 115V Model − Parts ListComplete Assembly Part 1 Complete Assembly Part 2 of 2 115V Model Complete Assembly Part 2 Page Page Page Support ServiceMiller Electric Mfg. Co Owner’s Record