Lincoln Electric IM422 PRO-CUT 40 - Manual (Page 13)

MAINTENANCE PROCEDURES
ROUTINE MAINTENANCE
1. Keep the cutting area and the area around the
machine clean and free of combustible materi-
als. No debris should be allowed to collect
which could obstruct air flow to the machine.
2. Every 6 months or so, the machine should be
cleaned with a low pressure airstream. Keeping
the machine clean will result in cooler operation
and higher reliability. Be sure to clean these
areas:
• Power, Driver, Switch, and Control printed
circuit boards
• Power switch
• Main Transformer
• Input Rectifier (located on fan baffle)
3. Examine the sheet metal case for dents or
breakage. Repair the case as required. Keep
the case in good condition to assure that high
voltage parts are protected and correct spacings
are maintained. All external sheet metal screws
must be in place to insure case strength and
electrical ground continuity.
4. Check the air regulator filters to be sure they do
not become clogged. The first stage of the air
filter on the machine is self draining and will
stop most of the water in the air line. The sec-
ond stage of the filter is also self draining and
will stop almost all of the oil in the line as well as
particulate matter. Both stages will drain auto-
matically when the flow rate changes rapidly.
5. Check the filter elements every several months
to see if they are clogged (weekly in very dirty
environments). Replace if necessary.
6. Inspect the cable periodically for any slits or
puncture marks in the cable jacket. Replace if
necessary. Check to make sure that nothing is
crushing the cable and blocking the flow of air
through the air tube inside. Also, check for
kinks in the cable periodically and relieve any so
as not to restrict the flow of air to the torch.
ELECTRICAL SHOCK CAN KILL.
Turn off machine at the disconnect switch at the back
of the machine before tightening, cleaning or replacing
consumables.
------------------------------------------------------------------------
Change consumables as required.
PERIODIC MAINTENANCE
Thermal Protection
Two thermostats protect the machine from excessive
operating temperatures. Excessive temperatures may
be caused by a lack of cooling air or operating the
machine beyond the duty cycle and output rating. If
excessive operating temperature should occur, the
yellow thermal LED will light and the thermostat will
prevent output voltage or current.
Thermostats are self-resetting once the machine cools
sufficiently. If the thermostat shutdown was caused
by excessive output or duty cycle and the fan is oper-
ating normally, the Power Switch may be left on and
the reset should occur within a 15 minute period. If
the fan is not turning or the air intake louvers were
obstructed, then the power must be switched off for 15
minutes in order to reset. The fan problem or air
obstruction must also be corrected.
– 13 –
ELECTRIC SHOCK CAN KILL.
BEFORE PERFORMING ANY MAINTE-
NANCE THAT REQUIRES OPENING
THE CASE OF THE POWER SOURCE:
• Disconnect input power to this machine at the
Disconnect switch and discharge input capacitors
before working inside machine.
• Do not touch electrically live parts or internal wiring.
• Only qualified personnel should service this
machine.
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WARNING
WARNING