Troubleshooting and repair, Caution – Lincoln Electric POWER MIG 11521 User Manual
Page 46
WIRE FEEDING PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
Rough wire feeding or the wire will
not feed but the drive rolls are turn-
ing.
1. The gun cable may be kinked or
twisted.
2. Check the drive roll tension and
the position of the grooves.
3. Electrode may be rusted or dirty.
4. The contact tip may be damaged
or not the correct size.
5. Check the wire spindle for ease of
rotation.
6. Make certain the gun is pushed
all the way into the gun mount
and properly seated.
No control of wire feed speed.
Other machine functions are nor-
mal.
1. The wire feed speed control may
be dirty. Rotate several times and
check if the problem is resolved.
1. The wire speed control potentiome-
ter may be faulty. Check or replace.
Normal potentiometer resistance is
10K ohms.
2. Perform the Wire Drive Motor and
3. The control board may be faulty.
There is no wire feed when the gun
trigger is activated. Normal open
circuit weld voltage is present and
the gas solenoid functions normal-
ly.
1. Check for adequate wire supply.
2. If the drive rolls are turning, check
for a mechanical restriction in the
wire feed path.
3. The gun liner may be clogged.
Check or replace.
4. If the drive rolls are not turning
when the gun trigger is activated,
contact your local Lincoln Electric
Authorized Field Service Facility.
1. Perform the Wire Drive Motor and
2. The wire speed control potentiome-
ter may be faulty. Check or replace.
Normal potentiometer resistance is
10K ohms.
3. The control board may be faulty.
TROUBLESHOOTING AND REPAIR
F-8
F-8
Power MIG® 215XT