Lincoln Electric OUTBACK SVM204-A Service Manual page 49

F-9
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
(Continued)
There is no weld output, or weld
voltage drops dramatically when
trying to strike an arc.
115/230 VAC auxiliary output is
normal; engine operates
normally.
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
connections, work clamps, and
electrode holder.
The
2. With engine running at high
idle, and output control set to
maximum,
voltage at the weld output
terminals. It should measure
70 to 80 Volts RMS.
CAUTION
OUTBACK® 185
3. If voltage is present at J3-9, check
for battery voltage at J3-8 (lead
#224A). If voltage is not present,
replace the PC board.
4. If voltage is present at J3-8,
check for battery voltage at J1-
9 (lead #224). If voltage is not
present, check leads 224 and
224A.
terminal connections at the
hour meter.
5. Check that the PC board is
properly grounded, pin J1-2
(lead GND-G).
6. Perform the rotor flashing,
voltage,
tests.
7. Perform the stator resistance
and voltage tests.
weld cables,
1. Check for loose or damaged
connections
output terminals, the choke,
the rectifier, the rector, and the
stator. See wiring diagram.
check the DC
2. With engine running at high
idle, and output control set to
maximum, check for about 63
VAC from each of the two
stator weld windings (W1 to
W2) and (W3 to W4).
wiring diagram. If voltage is
not present for either test, the
stator is probably defective.
3. With the engine still running,
check for about 63 VAC at
W1A to W2 and from W3A to
W4. If voltage is not present
for either test, the reactor may
be defective.
RECOMMENDED
COURSE OF ACTION
Check the positive
and resistance
between the
See
F-9