35
WELD CONDITION
POSSIBLE CAUSE
REMEDY
13.Wire does not feed; motor
a. Kink, etc. in wire, or wire bound
a. Straighten; or feed wire until
running (drive roll turns).
on reel.
clear and cut off.
b. Wire freezing to contact tip
b. Free freeze, or remove contact
(burnback).
tip feed wire until clear cut end free,
and replace tip.
c. Clogged liner.
c. Replace liner.
14.Wire does not feed;
a. Motor
a. With wire speed dial on 10,
motor NOT running
press trigger. If voltage
(drive roll does not turn).
appears across motor leads
but motor does not run, check
motor gears and commutator
areas.
b.Power switch S3 and fuses.
b. With S3 ON, if voltage
across terminal 1 and 3 is 24 VAC,
switch and fuses are good.
c. Speed Potentiometer (POT).
c. Check for 1K ohms across
POT outside terminals.
d. Malfunctioning speed control board.
d. Check board voltages
(Para 5.3.1 b. and c.)
15.Wire feed does not stop.
a. Torch trigger switch.
a. Check continuity of Torch trigger
circuit; check to see if trigger lever
is stuck in “ON” position.
b. Malfunctioning relay (K3).
b. Check for proper action.
16.Gas continues to flow
a. Gas solenoid valve stuck open.
a. Tap solenoid or click on and off
after trigger release.
to clear valve.
SECTION 5 SERVICE
Summary of Contents for MIGMASTER 250
Page 1: ...F15 087 J 04 2003 MigMaster 250 Welding Package Instruction Manual...
Page 4: ...4 TABLE OF CONTENTS...
Page 22: ...22 SECTION 3 INSTALLATION...
Page 38: ...38 Figure 5 3 Wiring Migmaster 250 for 208 230 V Model D 32861 F...
Page 39: ...39 Figure 5 4 Wiring Migmaster 250 for 208 230 380 400 460 575 V Model D 33311 D...
Page 40: ...40 SECTION 5 SERVICE...
Page 52: ...52 SECTION 6 REPLACEMENT PARTS...
Page 53: ...53 NOTES...
Page 54: ...NOTES...
