Lincoln Electric 10120 Operator's Manual page 31

E-8
PROBLEMS
(SYMPTOMS)
Digital Ammeter not working properly
or erratic display.
Analog Meters not reading, or not
reading correctly.
220VAC receptacle not working.
(50/60 HZ machines only)
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.
TROUBLESHOOTING
Observe all Safety Guidelines detailed througout this manual
POSSIBLE
PROBLEMS
1. The meter PC board may not be
receiving the auxiliary or sensing
voltages. Check plug P3 and
plugs P12 & P13. See wiring
diagram.
2. The current feedback circuit may
be faulty. From the shunt to the
control board. See wiring dia-
gram.
3. The Digital meter PC board may
be faulty.
1. The meters may not be receiving
voltage or current feedback sig-
nals. Make sure plug P3 is
securely plugged in the control
board and plug J14 (in-line con-
nector) is securely seated in the
plug assembly from the control
board.
2. Check the current feedback and
voltage feedback circuits. See
wiring diagram.
3. The meter(s) may be defective.
1. Check the circuit breaker. Reset
if necessary.
2. Check for broken or loose con-
nections in the 220VAC circuit.
See wiring diagram.
CAUSE
If all recommended possible areas of
misadjustments have been checked
and the problem persists, contact
your local Lincoln Authorized
Field Service Facility.
CAUTION
CV-655
RECOMMENDED
COURSE OF ACTION
E-8