Troubleshooting Table

Symptoms

Cause

Remedy

 

 

 

No wire feed at

Circuit breaker in feeder/

Reset.

control box open.

gun, feeder not

 

 

Micro-switch defective/not

Replace switch. Check

operating, i.e. no

being activated.

switch for operation.

slave motor or

 

Check micro-switch wires

brake solenoid.

Broken electrical cable.

 

 

for continuity.

 

Circuit breaker in feeder/

Check motor leads for

 

control box open.

short. Reset.

 

Bad potentiometer.

Check potentiometer with

 

meter.

 

 

No wire feed

 

Check motor and

at gun, feeder

Broken electrical cable.

potentiometer wires for

operating properly.

 

continuity.

 

 

See specific feeder/

 

Bad speed control/PCB.

control box owner's

 

manual for speed control

 

 

 

 

operation.

 

Loose or no cable

Check all power

 

connections.

connections.

Wire feeds, but

Contactor control cable

Check power supply

welding wire is not

owner's manual for

loose or in wrong

energized.

location and type of

position.

 

contactor signal required.

 

 

 

Welding power source.

Check power source.

 

Dirty or worn conduit.

Blow out or replace

 

conduit.

 

 

Wire feeds

Wrong size contact tip.

See contact tip table.

erratically.

 

Check for lock washer

 

Idler roll stuck.

under idler roll, or replace

 

 

if damaged.

 

Bad potentiometer.

Check with meter.

 

 

Check potentiometer

Wire feeds one

Broken electrical cable.

wires for continuity or

 

short.

speed only.

 

 

See specific feeder/

 

 

 

Bad speed control.

control owner's manual for

 

 

speed control operation.

Wire walks out of

Idler roll upside-down.

Place groove in idler roll

toward top.

drive rolls.

 

Rear wire guide missing.

Replace wire guide.

 

Consult wire feeder and welding power supply owners manuals for further problem solving solutions.

Millermatic Python® Owner's Manual - Page

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Python 091-0593 owner manual Troubleshooting Table, Symptoms Cause Remedy