Troubleshooting - Lincoln Electric POWER MIG IM736-D Operator's Manual

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PROBLEMS
(SYMPTOMS)
Output voltage and wire feed is pre-
sent when gun trigger is not pulled
(not activated).
Machine output is low. Welds are
"cold", weld bead is rounded or
bumped up demonstrating poor wet-
ting into plate.
Poor arc striking with electrode
sticking or blasting off.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
LOCAL AUTHORIZED LINCOLN ELECTRIC FIELD SERVICE FACILITY for assistance before you proceed.

TROUBLESHOOTING

Observe Safety Guideline detailed in the beginning of this manual.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Check Weld Mode to make sure
the unit is in a CV Mode And not
a CC Mode.
2. Remove gun assembly from
machine. If problem is solved
gun assembly is faulty. Repair or
replace.
3. If problem persists when gun
assembly is removed from
machine then the problem is
within the POWER MIG 300.
1. Check input voltage. Make sure
input voltage matches name-
plate rating and reconnect panel
configuration.
2. Make sure settings for wire feed
speed and voltage are correct
for process being used.
3. Make sure output polarity is cor-
rect for process being used.
4. Check welding cables and gun
assembly for loose or faulty con-
nections.
1. Make sure settings for wire feed
speed and voltage are correct
for process being used.
2. The Run-In (Fast or Slow) speed
may be wrong for process and
technique being used. See
Operation Section.
3. The gas shielding may be
improper for process being used.
CAUTION
POWER MIG 300
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
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