Lincoln Electric SVM138-A Service Manual page 78

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TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The LN-9 GMA shuts down while
welding. Upon retriggering the
gun, the unit will weld again for a
period of time.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Make sure the power source
and wire feeder polarity switch-
es are set correctly for the
process being used.
2. Make certain the voltage control
switch on the Lincoln CV power
source is set in the "Remote"
position.
3. Make sure the #21 lead in the
control cable has continuity to
the work piece.
4. Check the 1/8 amp fuse on the
LN-9 GMA voltage PC board.
Replace if faulty.
5. Be sure the welding power
source is compatible with the
LN-9 GMA.
CAUTION
LN-9 GMA Wire Feeder
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Perform the Out of Voltage
Range Shutdown Test.
2. The control cable may be faulty.
Check or replace.
3. The voltage PC board may be
faulty. Replace.
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