Lincoln Electric IM663 RED-D-ARC D300K 3+3 - Manual (Page 24)

E-3 TROUBLESHOOTING E-3
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Welding arc is loud and spatters
excessively.
Welding current too great or too
small compared to indication on the
dial.
Arc continuously pops out.
1. Current setting may be too high.
Check setting and current output
with ammeter.
2. Polarity may be wrong. Check
polarity. Try reversing polarity or
try an electrode of the opposite
polarity.
1. Exciter output low causing low
output compared to indication.
Check exciter field circuit.
2. Operating speed too low or too
high. Adjust speed screw on gov-
ernor. (High idle - 1800 RPM)
1. “Current Range Selector” switch
may be set at an intermediate
position. Set the switch at the cen-
ter of the current range set at an
intermediate position desired.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Authorized Field
Service Facility.
(1) FLASHING THE FIELDS:
1. Stop the engine welder and remove the cover from the exciter.
2. Turn the “Fine Current Adjustment” (rheostat) to “100” on the dial.
3. Using a 12 volt automotive battery, connect itʼs negative terminal to the negative brush holder.
The negative brush holder is the one nearest to the rotor lamination. See the wiring diagram. With
the engine NOT running, touch the positive battery terminal to the positive brush holder. Remove
the battery from the circuit.
4. Replace the exciter cover. Start the welder and the generator voltage should build up.
D300K 3+3
WELDER TROUBLESHOOTING