Troubleshooting Guide - Lincoln Electric LN-15 WIRE FEEDER SVM166-A Service Manual

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TROUBLESHOOTING GUIDE

PROBLEMS
(SYMPTOMS)
Major physical or electrical damage
is evident when the sheet metal
cover(s) are removed.
The LN-15 does not "power-up"
when the on/off switch is turned to
the "ON"position.
When the gun trigger is activated
the wire drive runs and electrode
wire feeds, but there is no welding
output.
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
1-888-935-3877.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FEEDING PROBLEMS
1. Contact your local authorized
Lincoln Electric Field Service
Facility for assistance.
1. Make sure the correct input volt-
age is being applied (15 to
110VDC). See Specifications
Pages.
2. Make certain the "Work Clip" is
attached securely to the work
piece.
1. Make sure the contactor is func-
tioning correctly.
2. Check the current carrying leads
at the contactor and between
the contactor and the feed plate
for loose or faulty connections.
See the Wiring Diagram.
3. Make sure the welding gun is
connected correctly and func-
tioning correctly.
4. Make certain the DC power
source is functioning correctly.
CAUTION
LN-15
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Contact the Lincoln Electric
Service Department,
1-888-935-3877.
1. Check the on/off switch.
the wiring diagram.
2. Check the input rectifier bridge.
See the wiring diagram.
3. Perform the Boost
Supply Board Test.
4. The control board may be faulty.
5. If the Display Board is not lit
check the input voltages to the
Display Board. See the Wiring
Diagram.
1. Perform The Contactor Test.
2. The Control Board may be faulty.
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See
Power