The "MACHINE ON" LED is lit
but there is no response when
the torch trigger is pulled. The
"AIR PRESSURE" LED does
not turn on. The fan runs nor-
mally. The “FAULT” LED
blinks.

POSSIBLE AREAS OF
MISADJUSTMENT(S)

1. Check the air supply to the

machine. Make sure suffi-
cient air pressure is supplied
to the PRO-CUT 60. If the
air does not flow, the
machine will not operate.

2. Low air pressure will also

result in a "no start" condi-
tion. With the machine in
"PURGE" adjust the air reg-
ulator to 60 psi (413kPa)
minimum while air is flowing.
"AIR PRESSURE" LED
must be lit when the air is
flowing.

3. Check the operation of the

air solenoid by switching the
machine to "PURGE". If the
air pressure is sufficient the
air should begin to flow and
"AIR PRESSURE" LED
should turn on. Return to
the "RUN" mode. If air does
not flow when the torch trig-
ger pulled, consult your local
Lincoln Authorized Field
Service Facility.

4. Check torch consumables -

replace if necessary.

RECOMMENDED
COURSE OF ACTION

1. With 60 PSI applied to the

machine the air pressure
switch should be “closed.”
Check for continuity (less
than 1 ohm) between leads
#319 to #323. See wiring
diagram.

2. Check the air solenoid

(SV1) operation by apply-
ing 115 VAC to the solenoid
leads.
a. If the solenoid activates
and air flows, the solenoid
is good.
b. If the solenoid does not
activate, replace the
solenoid.

3. Check plug J10 on the

Control Board for loose or
faulty connections.

4. The Control Board could

be faulty. Replace.

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln
Electric Service Department for technical troubleshooting assistance before you proceed call 216-383-2531 or 1-800-833-9353.

AIR FLOW PROBLEMS

CAUTION