Troubleshooting & repair, Caution – Lincoln Electric POWER-ARC 4000 SVM103-A User Manual
Page 46
POWER-ARC 4000
TROUBLESHOOTING & REPAIR
F-5
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
No auxiliary power - welding output
is normal - engine runs normally.
1. Check circuit breakers CB1 and
CB2. Reset if tripped.
2. Make sure that the control rheo-
stat (R1) is set at “GENERA-
TOR” (maximum).
3. Check for loose or faulty plug at
power receptacle.
1. Check the auxiliary power re-
ceptacles ands associated wires
for loose or faulty connections.
2.
Check the continuity (zero
ohms) of leads 3, 3A (black); 6,
6A (yellow); and 5 (white) from
the receptacles to the stator
windings. See the Wiring Dia-
gram.
3. Make sure lead 5 (white) is
grounded to the machine frame
(zero ohms).
4. Check for an open or grounded
auxiliary winding in the stator, 6
(yellow) to 3 (black). See the
Wiring Diagram.