Troubleshooting Guide - Lincoln Electric PRINCE IM818 Operator's Manual

Trouble
No wire feed at torch, feeder no
operating, i.e. no slave motor or brake
solenoid.
No wire feed at torch, feeder operating
properly.
Wire feeds, but welding wire is not
energized.
Wire feeds erratically.
Wire feeds one speed only.
Wire walks out of drive rolls.
Poor gas/water fl ow.

Troubleshooting Guide

Cause
115/42VAC control fuse in feeder.
Micro-switch defective/not being
activated.
Broken electrical cable.
4 amp fuse (F1) in feeder/Control box
blown.
Bad potentiometer.
Broken electrical cable.
Bad speed control/PCB
Loose or no cable connections.
Contactor control cable loose or in
wrong position.
Welding power source.
Dirty or worn conduit.
Incorrect ressure on drive rolls.
Idler roll stuck.
Wrong size contact tip.
Bad potentiometer.
Broken electrical cable.
Bad speed control.
Idler roll upside-down.
Rear wire guide missing.
Incorrect placement of barrel insulator.
Prince ® XL - Owner's Manual - Page 15
Remedy
Replace fuse.
Replace switch. Check switch for
operation.
Check micro-switch wires for continuity.
Check motor leads for shorts; then
replace fuse.
Check potentiometer with meter.
Check motor and potentiometer wire
for continuity.
See specifi c cabinet/control box owners
manual for speed control operation.
Check all power connections.
Check power supply owner's manual
for location and type of contactor signal
required, i.e., closing or 115 VAC.
Check power source material.
Blow out or replace conduit.
Adjust pressure at both feeder and
torch.
Check for lock washer under idler roll,
or replace if damaged.
See contact tip table.
Check with meter.
Check potentiometer wires for
continuity or short.
See specifi c cabinet/control owner's
manul for speed control operation.
Place groove in idler roll toward top.
Replace wire guide.
Slide barrel insulator downa nd thread
until it bottoms out, covering coolant
ports and exposing gas ports.