TM 9-3431-254-14&P
TROUBLE
POSSIBLE CAUSE
REMEDY
d. Faulty regulator board
d. Refer to Control Box Malfunction, page
18, for detailed troubleshooting instruc-
(continued)
tions.
Voltage too high
a. Engine overspeeding
a. Check engine RPM; should read 1825-1840
(no load).
b. Faulty regulator board
b. Same as d. above.
Voltage too low
a. Engine running underspeed
a. Check engine RPM.
b. One or more revolving field
b. Replace defective coils.
coils shorted
Operator gets shock when
a.
welding generator is
b. Work table and work not
touched. Operator gets
b. Ground work and work table to plant
shock when ground cable,
grounded
ground.
work or work table is
touched.
Abnormal current
a. Irregular wire feed speed
a. See welding head manual.
fluctuation, voltage
nearly constant
b. Inadequate shielding of arc by
b. Increase shielding by trial and error.
See welding head manual.
c. Wire feed rate too slow
c.
Increase wire feed. See wire bum-off
rate charts.
d. Too much shielding gas
d. Decrease by trial and error. See welding
head manual.
e.
Loose cable connections
e.
Check for overheated connections and
tighten.
f. Welding contact tube (tip) on
f. Check contact tube hole size and replace
wire feeder makes poor contact
with proper tube.
with electrode
Contactor fails to open
a. Contactor contacts sticking
a.
Clean contacts.
a. Faulty Control Board
Line contactor fails to
Refer to Control Box Malfunction, page
a.
close
18, for detailed troubleshooting instruc-
tions.
Contactor chatters
a.
Line leads too small
a.
Use larger leads.
b.
Low line voltage
b. Check line voltage.
17