Lincoln Electric LN-23P Service Manual page 34

F-6
Observe Safety Guidelines detailed in the beginning of this manual.
Since the K350 (-1) adapter is the communication link between the feeder and the power source,symptoms that
seem to indicate a defective feeder may be due to a defective adapter or control cable. If a working feeder and
cable is available, connecting it will help to isolate the problem. If this is not convenient, either replace the
adapter or follow the troubleshooting steps for the K350.
PROBLEMS
(SYMPTOMS)
Motor wonʼt run. No voltage on the
meter. Feeder checks OK and
power source has output.
NOTE: Symptoms on this page
assume that the LN-23P is
connected to Feeder "A"
terminal strip
Motor wonʼt run when trigger is
pulled. OCV shows on voltmeter.
No voltage control or cannot obtain
desired voltage.
Feeder A works OK, Feeder B does
not
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 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
All manuals and user guides at all-guides.com
K350 ADAPTER PROBLEMS
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1. Disconnect the Work Sensing
lead from the terminal strip and
with power applied to the K350,
check for continuity from the #21
terminal to #521 on Feeder "A"
Terminal strip.
2. Check for 24VAC at terminals
605 &606 at PC Board.
1. Temporarily jumper #602 from
terminal strip to #610.
1. Run test with the power source
in ʻLOCALʼ control.
2. Check the Voltage Control
potentiometer.
1. Make sure 2CR relay operates
when Feeder "B" trigger is
pulled.
CAUTION
1. If reading is 0 ohms, check the
2. If the voltage is 0, check for
3. Make sure the power source is
4. Perform the K350 Adapter test.
1. If motor runs, check connections
1. If desired voltage can be
2. Perform the Potentiometer
1. If relay does not operate:
LN-23P
RECOMMENDED
COURSE OF ACTION
control cable to the LN-23P.
120vac at terminals #31 & #32.
supplying 120vac to the cable.
to relay. Replace 2CR relay.
If motor does not run check
leads 602 & 604 from terminal
strip to PC Board and to 2CR.
achieved;
• Check cable from power
source to adapter.
• Check connections from
Feeder "A" terminal strip to
1CR.
test.
• Check wiring from Feeder"B"
terminal strip.
• Perform the K350 Adapter
test.
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