Troubleshooting & repair, Caution – Lincoln Electric POWER-ARC 4000 SVM103-A User Manual
Page 45
TROUBLESHOOTING & REPAIR
POWER-ARC 4000
F-4
TROUBLESHOOTING GUIDE
Observe Safety Guidelines
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 weld output - auxiliary power
(230 - 115 VAC) operates normally
- engine runs normally.
1. Check the open circuit voltage
(OCV) at the welder output ter-
minals. If OCV is okay, go to
Step 2, below.
If OCV is not present at the welder
output terminals, contact your
local Lincoln Electric Authorized
Field Service Facility.
2.
Check the welding cables,
clamps and electrode holder for
loose or broken connections.
1. Check continuity (zero ohms) of
lead W1A (black) from output
terminal to reactor (L1). See the
Wiring Diagram.
2. Check continuity (zero ohms) of
lead W2 (black) from output ter-
minal to stator winding. See the
Wiring Diagram.
3. Check continuity (zero ohms) of
lead W1 (black) from reactor
(L1) to stator winding. See the
Wiring Diagram.
4. Check reactor (L1) for continuity
of winding. See the Wiring Dia-
gram.
5. Check the stator for continuity
of winding. See the Wiring Dia-
gram.
6. Make certain the reactor and/or
stator are NOT grounded. Mini-
mum acceptable resistance to
ground is 500 K-ohms.