No output but the fan operates normally, Troubleshooting & repair, Caution – Lincoln Electric INVERTEC V250-S User Manual
Page 37
F-5
TROUBLESHOOTING & REPAIR
F-5
INVERTEC V250-S
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 the Lincoln Electric
Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.
CAUTION
OUTPUT PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
No output but the fan operates nor-
mally.
1. The mode switch must be in one
of the SMAW modes or if in the
GTAW mode the remote trigger
circuit must be activated.
2. The Local/Remote switch (S3)
must be in the LOCAL position
unless a remote control device is
attached to the remote
receptacle.
3. If the machine has not been used
for a long time and is connected
for 380 VAC or higher, the
capacitors may need “condition-
ing”. See
4. The machine may be overheated.
Check the thermal indicator light.
Wait for the machine to cool and
the thermostats to reset.
2. Check for loose or broken
connections on the high current
carrying parts of the V250-S.
(i.e., output diodes, output
terminals, shunt and main
transformer connections.)
3. Check the continuity of the
normally closed thermostats and
associated wiring. See wiring
diagram.
4. Perform the