Lincoln Electric IM983 RED-D-ARC DC655e (CE) - Manual (Page 30)

E-6 TROUBLESHOOTING E-6
DC655e (CE) (RED-D-ARC)
Observe all Safety Guidelines detailed througout 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 Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Thermal Protection Light comes ON
and fan does not run.
NOTE: Fan is thermal controlled and
does not continuously run when
machine is powered up.
Fan runs continuously.
One or both Digital Meters not light-
ing.
Digital Voltmeter not working proper-
ly or erratic display.
1. Check for obstructions that could
prevent the fan from turning.
2. Check the fan control circuit. See
wiring diagram.
3. The fan motor may be faulty.
4. The Thermal Fan/Snubber PC
board may be faulty. See PC
board LED information.
1. The Thermal Fan Thermistor may
be faulty. See wiring diagram.
2. The Thermal Fan/Snubber PC
board may be faulty. See PC
board LED information.
1. The meters may not be receiving
the voltages from the auxiliary
transformer. Check plug P13.
See wiring diagram.
2. The Digital meter PC board may
be faulty.
1. Meter may not be receiving auxil-
iary or sensing voltages. Make
sure plug P12 & P13 are securely
plugged into the Digital meter PC
board and also plug P3 is securely
plugged into the control board.
2. The may be an open in the volt-
age feedback circuit. See wiring
diagram.
3. The Digital meter PC board may
be faulty.
Contact your Local Authorized Field
Service
Facility for technical
troubleshooting assistance.