E-4
E-4
TROUBLESHOOTING
PROBLEMS
(SYMPTOMS)
The wire feed stops while welding.
When trigger is released and
pulled again the wire feed starts.
No control of wire feed speed.
Other machine functions are nor-
mal.
Gas does not flow when gun trigger
is pulled.
POSSIBLE
CAUSE
1. Check the wire feed drive rolls
and motor for smooth operation.
2. Check for restrictions in the wire
feed path. Check the gun and
cable for restrictions.
3. Make sure gun liner and tip are
correct for wire size being used.
4. Make sure drive rolls and guide plates
are clean and are the correct size.
5. Check spindle for ease of rotation.
1. The wire feed speed control may
be dirty. Rotate several times
and check if problem is resolved.
1. Make sure gas supply is con-
nected properly and turned
“ON”.
2. If the gas solenoid does actuate
(click) when the gun trigger is
pulled, there may be a restriction
in the gas supply line.
3. The gun cable assembly may be
faulty. Check or replace.
4. If gas solenoid does not operate
when gun trigger is pulled, the
problem is within the POWER
MIG
®
256.
5. Make sure the gun is pushed all
the way into gun mount and is
properly seated.
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.
GAS FLOW PROBLEMS
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.
CAUTION
FEEDING PROBLEMS
Observe all Safety Guidelines detailed throughout this manual
POWER MIG
®
256
Summary of Contents for POWER MIG 256
Page 34: ...NOTES ...
