Lincoln Electric POWER MIG 140 Manuel Opérateur page 29

POWER MIG 140 & 180 MODELS
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Low or no gas flow when gun
pulled. Wire feed, weld output and fan
operate normally.
Arc is unstable – Poor starting.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
POSSIBLE
CAUSE
GAS FLOW PROBLEMS
trigger is 1. Check gas supply, flow regulator and
gas hoses.
2. Check gun connection to machine for
obstruction or leaky seals.
WELDING PROBLEMS
1. Check for correct input voltage to
machine.
2. Check for proper electrode polarity for
process.
3. Check gun tip for wear or damage and
proper size – Replace.
4. Check for proper gas and flow rate for
process. (For MIG only.)
5. Check work cable for loose or faulty
connections.
6. Check gun for damage or breaks.
7. Check for proper drive roll orientation
and alignment.
8. Check liner for proper size.
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.
If all recommended possible areas of
misadjustment have been checked and the
problem persists, CONTACT YOUR LOCAL
LINCOLN AUTHORIZED FIELD SERVICE
FACILITY
E-3
TROUBLESHOOTING
RECOMMENDED