2. troubleshooting – Miller Electric PipePro Dual User Manual
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OM-230 009 Page 32
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Disconnect power before troubleshooting.
9-2. Troubleshooting
Trouble
Remedy
Wire feeds, shielding gas flows, but
electrode wire is not energized.
Check cable connections. Check cables for continuity, and repair or replace cables if necessary
Wire feeder is on, display does not light
up, motor does not run, gas valve and
welding power source contactor do not
pull in.
Check and reset circuit breaker at welding power source.
Electrode wire feeding stops, or feeds
erratically during welding
Check gun trigger connection. See gun Owner’s Manual.
erratically during welding.
Check gun trigger. See gun Owner’s Manual.
Readjust hub tension and drive roll pressure (see Section 5-6).
Change to correct size drive roll (see Table 9-1).
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 nozzle opening.
Have Factory Authorized Service Agency check drive motor or motor control board PC1.
Motor runs slowly.
Check for correct input voltage.
Wire feeder power is on, displays light
up, feeder jogs, purges, but unit is in-
operative.
Check welding gun trigger leads for continuity, and repair leads or replace gun.
When triggered, wire feeds but no gas,
no contactor.
If the welding arc does not establish in 3 seconds after the gun trigger is activated the unit will feed
wire, but turns off contactor and gas valve. If the gun trigger is still activated after two minutes, the
wire will stop feeding.
When triggered, wire feeds, but no
contactor.
If the gun trigger does not enable output, make sure remote switch is in the correct position