Miller 301571 Manuel du propriétaire - Page 23

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Miller 301571 Manuel du propriétaire

7-3. Troubleshooting Table

Trouble
No wire feed at gun, feeder not operat-
ing. Check motor or brake solenoid.
No wire feed at gun, feeder operating
properly.
Wire feeds, but welding wire is not
energized.
Wire feeds erratically.
Wire feeds one speed only.
Pressing gun trigger does not energize
feeder. Welding wire is not energized.
Shielding gas does not flow.
Wire feeds, shielding gas flows, but
welding wire is not energized.
!
Reset circuit breaker at power source. See power source owner's manual.
Replace trigger-switch and test operation.
Check trigger-switch wires for continuity.
Reset circuit breaker in feeder/control box and check for short in motor leads. See feeder/control owner's
manual.
Check potentiometer with meter and replace if necessary.
Check motor and potentiometer wires for continuity.
See feeder/control owner's manual.
Clean and tighten all power connections.
See feeder/control owner's manual.
Check operation of welding power source.
Check conduit for wear and obstruction and replace if necessary.
Check contact tip for correct size and replace if necessary.
Check pressure roll tension setting (see Section 6-2).
Check for proper head tube liner (see Table 9-7).
Check potentiometer with meter and replace if necessary.
Check continuity of welding gun wire feed speed potentiometer and replace if necessary.
See feeder/control owner's manual.
Secure plug from gun control cable into gun control receptacle on feeder.
Have nearest Factory Authorized Service Agent check optional water flow switch, if applicable.
See Troubleshooting section in welding power source manual.
Disconnect power before troubleshooting.
Remedy
OM-285555 Page 19