Lincoln Electric MAGNUM PCT125M - Manual (Page 19)

D-4 TROUBLESHOOTING D-4
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
Only a brief spurt of a Pilot Arc
appears
Electrode Stuck in Torch head
a. Make sure the air pressure is
set correctly
b. Consumables may be improper-
ly assembled.
c. There may be oil in the air.
d. The Pro-Cut may be in expand-
ed metal mode.
e. The swirl ring may have holes
out of spec.
f. The Pro-Cut is not working prop-
erly.
a. The duty cycle may have been
exceeded
b. Make sure the Pro-Cut has the
larger solenoids (this applies to
codes 10097 and lower only)
c. Make sure the air pressure is
set properly.
a. Put the Pro-Cut in Purge and
adjust the air pressure to 55-65
psi while the air is flowing.
b. Make sure an electrode, swirl
ring, nozzle and shield cup are
assembled in the torch.
c. Check the filters in the regula-
tors for oil. Replace if neces-
sary and eliminate the source of
oil.
d. This is a normal condition which
occurs after several long pilot
arcs have been pulled in a row.
After a while, the Pro-Cut will
return to the standard pilot arc if
no pilot arcs are pulled for sev-
eral seconds.
e. Some swirl rings were shipped
with the swirl hole diameter too
large. If possible, use plug
gages to make sure the swirl
hole diameter is not larger than
.028”.
f. Refer to the troubleshooting
guide for the Pro-Cut 125.
a. Operate the Pro-Cut within the
duty cycle limits (125 Amps at
60%, 100 Amps at 100%.)
b. Install a S21237 solenoid kit.
c. Put the Pro-Cut in Purge and
adjust the air pressure to 55-65
psi while the air is flowing.