Lincoln Electric LN IM311-E - Manual (Page 19)

E-3 TROUBLESHOOTING E-3
LN™-23P
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Improper wire speed control.
Can’t obtain required voltage.
1. Faulty printed circuit board,
faulty rheostat, or faulty motor.
1. Defective power source of CV
Converter.
2. On SAM welders, constant
voltage control must be adjusted
to give required voltage and
mode switch must be set to
constant voltage position.
3. On transformer or inverter
welders, fine voltage control
switch must be set to remote
position.
4. Broken lead(s) in 75-76-77
(A-B-C) control circuit.
5. Defective voltage control
rheostat.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.