Lincoln Electric RANGER 3PHASE SVM207-A Service Manual page 43

F-5
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
No weld output in AC or DC Modes.
The auxiliary power (480, 23 &
115VAC) is normal. Engine runs
normally.
No DC welding output. AC welding
output and auxiliary power is nor-
mal.
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 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Check the
clamps and electrode holder for
loose or broken connections.
2. Check the open circuit voltage
(OCV) at the welder output termi-
nals, engine at high idle (3650
RPM). Normal maximum is 73 to
80VAC. Normal DC maximum is
67 to 72VDC. If the OCV is OK
then proceed to Step #2.
1. Make sure the Polarity Switch is
in the proper position and is
"seated" correctly.
2. Make sure the electrode and
polarity are correct for the
process being used.
CAUTION
RANGER® 3 PHASE
welding cables, 1. Disconnect lead W1 from the
Output Bridge (D1) and check
for the presence of 80VAC from
lead W1 to lead W2 on the main
stator winding. See the Wiring
Diagram. If the AC voltage is
NOT present, the winding in the
stator may be faulty. Check the
winding for continuity and test to
be sure it is NOT grounded to
the stator iron.
Sstator if necessary. If the cor-
rect AC voltage is present, pro-
ceed to step #2.
2. Check the Reactor, Range
Switch (S1) and associated
wires for loose or faulty connec-
tions. Check the reactor wind-
ing for continuity and test to be
sure it is NOT grounded to the
reactor iron.
3. Check the Choke (L1), Polarity
Switch (S2) and associated
wires for loose or faulty connec-
tions. Check the choke winding
for continuity and test to be sure
it is NOT grounded to the choke
iron.
4. Check the weld output terminals
and associated wires for loose
or faulty connections.
5. Perform the Output Bridge
Test.
1. Perform the Output Bridge Test.
2. Check the Choke (L1), the
Polarity Switch (S2) and associ-
ated wires for loose or faulty
connections. Check the choke
winding for continuity and test to
be sure it is NOT grounded the
choke iron.
RECOMMENDED
COURSE OF ACTION
Replace the
F-5