Lincoln Electric MAGNUM PCT125M - Manual (Page 17)

D-2 TROUBLESHOOTING D-2
PLASMA TORCH
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
Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
FUNCTION PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE CAUSE
RECOMMENDED
COURSE OF ACTION
The torch does not start when the
trigger is pulled a. Blown fuse
b. Electrode or nozzle missing
c. Torch misconnected
d. Cable damaged
e. Torch connections assembled
improperly or shorted
f. Pro-Cut inoperative
a. Make sure all three phases are
present and the Pro-Cut is
reconnected for the proper volt-
age.
b. Properly assemble an electrode,
swirl ring, nozzle and shield cup
on the torch.
c. Make sure the pilot lead from
the torch cable is connected to
the pilot stud inside the Pro-Cut.
Verify that the fitting at the end
of the gas tube is connected to
the bulkhead union inside the
Pro-Cut.
d. Examine the cable for cuts or
punctures. Make sure there is
continuity from the nozzle at the
torch head to the ring lug at the
end of the pilot lead at the
machine end of the cable.
Make sure there is continuity
from the electrode at the torch
head to the fitting at the end of
the gas tube at the machine end
of the cable. replace any dam-
aged cable.
e. Remove the handles (or barrel)
of the torch and examine all the
connections. Pay attention to
lugs crimped on insulation, bro-
ken leads.
f. Refer to the troubleshooting
guide for the Pro-Cut 125.