Maintenance; Routine Maintenance; Periodic Maintenance - Lincoln Electric TOMAHAWK 375 AIR Operator's Manual

D-1
WARNING
ELECTRIC SHOCK CAN KILL.
• Have an electrician install and ser-
vice this equipment.
• Turn the input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
---------------------------------------------------------------------
ROUTINE MAINTENANCE
1. Keep the cutting or gouging area and the area
around the machine clean and free of combustible
materials. 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:
- Printed circuit boards and heat sinks
- Power switch
CAUTION
• When using a low pressure air stream, wear
appropriate eye protection.
------------------------------------------------------------------------
3. Examine the sheet metal case for dents or break-
age. Repair the case as required. Keep the case in
good condition to insure 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 continu-
ity.
4. Inspect the cable periodically for any slits or punc-
ture marks in the cable jacket. Replace if neces-
sary. 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.
5. Regularly clean the compressor air inlet filter.

MAINTENANCE

PERIODIC MAINTENANCE
----------------------------------------------------------------------------
Change consumables as required.
THERMAL PROTECTION
Thermal Detection Devices protect the machine from
excessive operating temperatures. Excessive temper-
atures may be caused by a lack of cooling air or oper-
ating the machine beyond the duty cycle and output
rating. If excessive operating temperatures should
occur, the yellow thermal LED will light and the
Detection Devices will prevent output voltage or cur-
rent.
These Detection Devices are self-resetting once the
machine cools sufficiently. If the thermostat shutdown
was caused by excessive output or duty cycle and the
fan is operating 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
and the fan problem or air obstruction must be cor-
rected.
A protection circuit is included to monitor the voltage
across filter capacitors. In the event that the capacitor
voltage is too high, the protection circuit will prevent
output.
TOMAHAWK™ 375 AIR
WARNING
ELECTRIC SHOCK CAN KILL.
• Turn off machine at the disconnect
switch on the rear of the machine
before tightening, cleaning or
replacing consumables.
D-1