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E-4
TROUBLESHOOTING
E-4
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
When the trigger is pulled air begins
to flow, but there is no pilot arc after
at least 3 seconds.
The air begins to flow and there is a
very brief arc that snaps out consis-
tently with repeated trigger pulls.
The arc starts but sputters badly.
1.
Check the torch consumables to be
sure they are not dirty or greasy,
and are in good shape. Replace
the consumables if necessary.
2. Make sure the air pressure is set
at 70 psi.
3. Make sure there are no kinks or
restrictions for air flow in the torch
cable. Replace cable as needed.
4. If a slight thump cannot be felt in
the torch when the trigger is
pulled, check for loose connection
in the torch head and solenoid
assembly.
5. With machine turned off - input
power removed, and torch and
consumables connected - mea-
sure resistance on Output Power
board between B1 and B21. If
>10Ω, possible fault in torch and
cable assembly.
6. Possible fault in Output board.
1. Check the torch consumables to
be sure they are in tight, not dirty
or greasy and in good shape.
Replace if necessary.
2. Make sure the air pressure is set
at 70 psi.
3.
Possible fault in Output Power board.
1. Check the torch consumables to be
sure they are in tight, not dirty or
greasy and in good shape. Replace if
necessary.
2. Check air supply for oil or a great deal
of water. If there is oil or a great deal
of water, the air must be filtered or the
machine switched to nitrogen or bot-
tled air.
3. Make sure the air pressure is set at 70
psi.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.