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Miller AA40GBR w/OCP Panduan Pemilik

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 DIAGRAM
Figure 5-1. Circuit Diagram For AA-40GR/Gas Box (Left Hand)
OM-223 426 Page 16
!
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.
Disconnect power before troubleshooting
Remedy
221 660-A