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F-5
TROUBLESHOOTING AND REPAIR
F-5
LN-10
TROUBLESHOOTING GUIDE
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
The drive motor does not turn
when the gun trigger is activated.
The displays are lit and the correct
input voltage (42 VAC) is applied
to the LN-10.
The drive motor does not turn,
although the arc voltage is present
and the gas solenoid works when
the gun trigger is activated.
There is NO control of wire feed
speed. The motor turns, the gas
solenoid operates and arc voltage
is present. The WFS can be pre-
set.
1. If an error message “HXX”
appears on the wire feed dis-
play, the unit may be over-
loaded. The “XX” indicates the
time remaining in seconds
before the unit automatically
resets.
2. Make certain the dip switches
are set correctly for the power
source being used. See
Welding Power Source
Selection.
3. Ajumper plug or K1558-1
Remote Switch Interface
Module must be properly
installed into connector J5 on
the control board.
1. Check the connections between
the drive motor and the control
board. See the Wiring Diagram.
1. Check the tach leads between
the tach (hall effect device) and
the control board. See the
Wiring Diagram.
1. For feeders using the Remote
Switch Interface Module, make
sure there is continuity (zero
ohms) in the circuit connecting
the two terminals marked 1A on
the remote switch interface P.C.
board.
2. Make sure the gun trigger circuit
is working properly. See the
Wiring Diagram.
3. Perform the Wire Drive Motor
Test.
4. The control board may be faulty.
1. Perform the Wire Drive Motor
Test.
2. The control board may be faulty.
1. Perform the Tach Adjustment
and Feedback Test.
2. Perform the Wire Drive Motor
Test
3. The control board may be faulty.
FUNCTION PROBLEMS
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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