MK Products WC-1-110 - Manual (Page 16)

Owner’s Manual - Page 15
Section 13 TROUBLESHOOTING
TROUBLE CAUSE REMEDY
No wire feed at torch
F3 fuse in WC-1 blown. Check 115VAC circuit. Replace fuse.
F1 fuse in WC-1 blown.
Check motor leads for shorts, then replace
with 4A fuse.
Micro-switch defective/not being
activated. Broken electrical cable.
Replace switch. Check switch for
operation. Check micro switch wires for
continuity.
Relay K2 inoperative. Check/Replace relay K2.
Loose P.C. board connectors. Check connectors.
Bad potentiometer. Check potentiometer with meter.
Bad torch motor. Check/replace motor.
Broken electrical cable
Check motor and potentiometer wires for
continuity.
Bad speed control/PCB. Check/Replace P.C. board.
Wire feeds, but
welding wire is not
energized.
Loose or no cable connections.
Relay K2 not sending contactor
signal.
Check all power connections.
Check/replace relay K2.
Contactor control cable loose or in
wrong position.
Check power supply owners manual for
location and type of contactor signal
required, i.e., closing contacts or 115VAC.
Welding power source. Check power source for operation.
Wire feeds erratically.
Excessive spool drag pressure. Decrease spool drag pressure.
Dirty or worn liners. Blow out or replace liners.
Incorrect pressure on drive rolls. Adjust pressure at both feeder and torch.
Idler roll stuck.
Check for lock washer under idler roll, or
replace if damaged.
Wrong size contact tip. See contact tip table.
Wire feeds one
speed only.
Bad potentiometer. Check with meter.
Broken electrical cable.
Check potentiometer wires for continuity or
short.
Bad speed control. Check/replace P.C. board.
Wire walks out of
drive rolls
Idler roll upside-down. Place groove in idler roll towards top.
Rear wire guide missing. Replace wire guide.