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F-11
TROUBLESHOOTING AND REPAIR
F-11
LN-10
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
The wire feeds for a few seconds
and stops. The voltage display
reads less than 8 VDC while the
wire is feeding.
The dual procedure switch is not
functioning at the gun.
1. Make sure the electrode and
work cables are connected
securely and properly.
2. Make sure the #21 lead is con-
nected correctly at the power
source.
3. Make sure the power source is
operating correctly and capable
of putting out more than 8 VDC.
1. Make sure the dual procedure
switch is installed and connect-
ed properly.
2. The “Remote LED” on the
keypad must be lit and the
toggle switch on the remote
control (if present) must be in
the gun position.
1. Make sure the #21 lead has
continuity (zero ohms) to the
workpiece and #67 lead has
continuity (zero ohms) to the
electrode wire. See the Wiring
Diagram.
2. The control board may be
faulty.
1. Check the resistance between
pins E & M of the 14 pin
Amphenol connector on the
wire drive while the dual proce-
dure switch is opened and
closed. The resistance must
change from an open to almost
no resistance. If the resistance
doesn’t change when the switch
is opened and closed, check
leads #519 and #520 for a bro-
ken solder connection or wire.
See the Wiring Diagram.
2. Check the resistance between
leads #519 and #520 of the plug
that goes into connector J7 on
the control P.C. board. As the
dual procedure switch is
opened and closed, the resis-
tance between leads #519 and
#520 must change. If the resis-
tance doesn’t change, Check
for a broken connection or wire
in the #519 and #520 leads.
See the Wiring Diagram.
3. The control board may be
faulty.
FUNCTION PROBLEMS (Continued)
CAUTION
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 1-800-833-9353.
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