Filter
Top Products
TROUBLESHOOTING & REPAIR
F-20 F-20
LN-9 Wire Feeder
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
STARTING PROBLEMS
The output voltage is too low to
start the weld.
1. Check the welding cables for
loose or faulty connections.
2. Put the Lincoln power source in
the "Machine Control" mode.
Jumper the "BYPASS" pins on
the LN-9 voltage PC board.
Adjust the weld voltage from the
power source for the process
being used. If the correct volt-
age cannot be set, the power
source may be faulty.
3. Check for correct control cable
connections to the power
source.
4. The control cable may be faulty.
Check or replace.
5.
The start trimmer on the LN-9
voltage PC board may be set too
low. See
Starting Characteris-
tics
in the
Operation
section of
this manual.
1. Check the voltage control
potentiometer (R3) and the
associated leads. See the
Wiring Diagram.
2. The voltage PC board may be
faulty. Replace.
CAUTION
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.