Troubleshooting And Repair - Lincoln Electric SVM143-A Operator's Manual

F-6
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
No control of wire feed speed on
both sides. Both motors run, both
solenoids operate and arc voltage
is present. The WFS can be preset
on both sides.
The wire feeds and the gas sole-
noid operates but no arc voltage is
present.
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 216-383-2531 or 1-800-833-9353.
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TROUBLESHOOTING AND REPAIR

POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS (Continued)
1. Check the tach leads between
the tach (hall effect devices)
and the control board. See the
Wiring Diagram.
1. Make certain the electrode and
work cables are connected
correctly.
2. Make certain the control cable
between the DH- 10 and the
power source is in good working
condition.
3. Make certain the power source
is operating properly and capa-
ble of producing welding voltage
and current.
CAUTION
RECOMMENDED
COURSE OF ACTION
1. Perform the Tach Adjustment
2. Perform the wire Drive Motor
3. The control board may be
1. Check the continuity (zero
2. The control board may be
DH-10
and Feedback Test.
Test.
defective.
ohms) of leads #2 and #4
between the input cable recep-
tacle and plug j8 on the control
board. See the Wiring Diagram.
faulty.
F-6