Lincoln Electric MAGNUM PCT125M - Manual (Page 18)

D-3 TROUBLESHOOTING D-3
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 Safety LED is lit a. The Pro-Cut was quickly turned
“off” then “on” again.
b. The shield cup is missing.
c. The shield cup is not making
contact with the pins of the torch
head
d. Torch misconnected
e. Cable damaged
f. Standoff too high
g. Pro-Cut inoperative
a. Press the SAFETY RESET but-
ton.
b. Make sure an electrode, swirl
ring, nozzle and shield cup are
all properly assembled on the
torch.
c. Verify that the spring loaded ring
in the back of the shield cup is
not jammed. Replace as neces-
sary.
d. 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.
e. 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
the cable. Replace any dam-
aged cable.
f. Maintain a standoff of .15” to
.25” during cutting. Too high of
a standoff may trip the safety
circuit..
g. Refer to the troubleshooting
guide for the Pro-Cut 125