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4-3. Troubleshooting

Trouble

Electrode wire feeding stops or feeds er-

ratically during welding.

Motor runs slowly.

Motor runs at full speed regardless of

wire speed setting.

SECTION 5 − ELECTRICAL DIAGRAMS

Figure 5-1. Circuit Diagram For AMD-4G, AMD-4GR, And AMD-4GH

OM-179 082 Page 14

Readjust hub tension and drive roll pressure.

Change to correct size drive roll.

Clean or replace dirty or worn drive roll.

Incorrect size or worn wire guides.

Replace contact tip or liner. See gun Owner's Manual.

Remove weld spatter or foreign matter from around gun nozzle opening.

Check and secure motor plug connection.

Have Factory Authorized Service Agent check drive motor.

Reduce load.

Check for correct input voltage.

Have Factory Authorized Service Agent check digital wire drive motor Tachometer board and encoder

disc.

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Remedy

180 590