Lincoln Electric LN-25 SVM179-B Service Manual page 51

F-7
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
No shielding gas.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
GAS SHIELDING ISSUES
1. The gas supply is off or empty.
2. The gas hose is cut or crushed.
3. The flow meter is closed. Dirt
or debris is in the solenoid.
4. There is a loose connection at
the solenoid.
5. The solenoid has failed.
CAUTION
LN-25™ PRO
RECOMMENDED
COURSE OF ACTION
1. Verify the gas supply is ON and
flowing.
2. Reroute the gas hose to avoid
sharp corners and make sure
nothing is on it. Repair or
replace damaged hoses.
3. Open the flow meter valve.
4. Apply 80 psi of filtered air to the
solenoid to remove dirt and
debris.
5. Remove the cover and verify
that all the connections are in
good condition.
6. Perform the GAS SOLENOID
TEST, replace if necessary.
F-7