Python 240-8XX 091-0593 - Manual (Page 20)

Millermatic Python ® Owner's Manual - Page 8
Troubleshooting Table
Symptoms Cause Remedy
No wire feed at
gun, feeder not
operating, i.e. no
slave motor or
brake solenoid.
Circuit breaker in feeder/
control box open.
Reset.
Micro-switch defective/not
being activated.
Replace switch. Check
switch for operation.
Broken electrical cable.
Check micro-switch wires
for continuity.
No wire feed
at gun, feeder
operating properly.
Circuit breaker in feeder/
control box open.
Check motor leads for
short. Reset.
Bad potentiometer.
Check potentiometer with
meter.
Broken electrical cable.
Check motor and
potentiometer wires for
continuity.
Bad speed control/PCB.
See specific feeder/
control box owner's
manual for speed control
operation.
Wire feeds, but
welding wire is not
energized.
Loose or no cable
connections.
Check all power
connections.
Contactor control cable
loose or in wrong
position.
Check power supply
owner's manual for
location and type of
contactor signal required.
Welding power source. Check power source.
Wire feeds
erratically.
Dirty or worn conduit.
Blow out or replace
conduit.
Wrong size contact tip. See contact tip table.
Idler roll stuck.
Check for lock washer
under idler roll, or replace
if damaged.
Wire feeds one
speed only.
Bad potentiometer. Check with meter.
Broken electrical cable.
Check potentiometer
wires for continuity or
short.
Bad speed control.
See specific feeder/
control owner's manual for
speed control operation.
Wire walks out of
drive rolls.
Idler roll upside-down.
Place groove in idler roll
toward top.
Rear wire guide missing. Replace wire guide.
Consult wire feeder and welding power supply owners manuals for further
problem solving solutions.