Lincoln Electric Ranger 305D Service Manual page 65

F-11
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The arc quality is poor with exces-
sive spatter. The arc heat can be
controlled and maintained normal-
ly, the auxiliary output is normal,
and the engine operates normally.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-888-935-3877.
TROUBLESHOOTING & REPAIR
All manuals and user guides at all-guides.com
POSSIBLE AREAS OF
MISADJUSTMENT(S)
WELD OUTPUT PROBLEMS
1. The arc Control may be set too
high. Try using a lower setting.
2. The output control may be set
too high for the electrode being
used. Try welding at a lower
setting.
3. Check that the electrode used is
of good quality, dry, and free of
contamination. Try using some
new Lincoln Electrode, and set-
ting the machine per the
Lincolnʼs recommendations for
that product.
4. If shielding gas is used, check
that the correct gas is being
used, and that the gas flow is
set correctly.
system for damaged, pinched or
leaking hoses.
5. The weld cables may be coiled,
or wrapped around metal reels
or racks. This can cause exces-
sive electrical inductance in the
weld circuit. Try welding after
uncoiling the cables, or discon-
nect the existing weld cables
and attach a set of adequately
sized, short test cables.
CAUTION
RANGER 305D
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check that the weld circuit is not
grounded. With the engine off,
check the resistance between
chassis ground and the weld
output terminals.
tance should be very high, a
reading of 500,000 (500k) ohms
or higher is acceptable.
2. The weld control system may
be grounded or malfunctioning.
Perform
Switch Test, and the Remote
Potentiometer
Receptacle Resistance Test.
3. The Chopper module may be
defective.
Check the gas
Chopper Module Resistance
Test.
F-11
The resis-
the
Control
and Mode
Perform the