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E-7
TROUBLESHOOTING
E-7
PRO-CUT 55
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
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Press the reset button. If the torch
and consumables are properly
installed, the Safety LED should turn
off.
Try to recount the number of times
that the Safety LED has come on lit
and steady with this particular set of
consumables.
Check the condition of the electrode.
The maximum wear depth in the
center of the electrode tip is approxi-
mately .060" relative to the surround-
ing tip. A green and erratic arc will
indicate definite electrode failure as
explained in the "Consumable Life"
section of this manual.
Check the conditions of the inside of
the nozzle. Make sure that both the
electrode and nozzle are not dirty,
oily, or corroded.
Remove consumables from torch
and check inside of torch head for
contamination. Check incoming air-
flow for contaminants.
Make sure there is a Lincoln PCT 80
torch connected properly to the Pro-
Cut 55 and that the consumables are
properly installed. Make sure the
shield cup is hand tight. Do not use pli-
ers or over-tighten.
1. If the reset button (when pressed)
does not turn the Safety LED off,
the reset button or associated
wiring may be faulty. See the
wiring diagram.
1. If this has occurred numerous
times, clean consumables with a
piece of fine emery cloth to
remove any oxide buildup on the
tip of the electrode, or try replac-
ing the electrode and nozzle.
1. Replace both electrode and noz-
zle if electrode is excessively
worn. Otherwise, use a piece of
fine emery cloth to remove any
oxide buildup on the tip of the
electrode. Even if consumables
appear to be in good working
order, it is possible that they are
the cause of the problem. Try
replacing.
1. If debris has collected, rub the
electrode on the inside bottom of
the nozzle to remove any oxide
layer that may have built up. If
problems persist, try replacing
consumables.
1. If torch head is contaminated, take
a dry cotton swab and clean out
the pollutants. If needed, replace
air filter and check/change air sup-
ply. For more information, refer to
the "Gas Input Connections" sec-
tion in the manual.
1. After verifying that the torch and
consumables are properly set in
place, and the problem still per-
sists, contact your local Lincoln
Authorized Field Service Facility.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
NOTE: Make sure that consumables
are Lincoln Electric brand consum-
able parts. These parts are patented
and using any other replacement
consumables may cause damage to
the torch or reduce cut quality. Also
be sure to check that the nozzle is
the correct part number (as identified
on the top and side of the nozzle) for
the Pro-Cut being used.
CONSUMABLE RELATED SAFETY LED
If the Safety LED is LIT AND STEADY, perform the following:
If the Safety LED is FLASHING, perform the following: