Trouble shooting section on rough wire feeding, Troubleshooting and repair, Caution – Lincoln Electric POWER MIG SVM157-A User Manual
Page 42: Troubleshooting guide
TROUBLESHOOTING AND REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
Troubleshooting Guide –
See Wiring Diagrams for location of specified
components and for troubleshooting of specific circuits.
F-8
F-8
POWER MIG 200
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 1-800-833-9353
CAUTION
WIRE FEEDING PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
No control of wire feed speed.
Other machine functions are nor-
mal.
There is no wire feed when the gun
trigger is activated. Normal open
circuit weld voltage is present and
the gas solenoid functions normally.
1. The wire feed speed control may
be dirty. Rotate several times and
check if the problem is resolved.
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. The wire speed control potentiometer
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.
1. Perform the Wire Drive Motor and
2. The wire speed control potentiometer
may be faulty. Check or replace.
Normal potentiometer resistance is
10K ohms.
3. The control board may be faulty.
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.