Lincoln Electric INVERTEC 270SX Service Manual page 10

ROUTINE MAINTENANCE
1. Keep the welding 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 the machine should be cleaned with a
low pressure and dry airstream. Keeping the machine
clean will result in cooler operation and higher reliability.
3. Examine the sheet metal case for dents or breakage.
Repair the case as required. Keep the case in good
condition to insure that high voltage parts are protected
and correct spacing are maintained. All external sheet
metal screw must be in place to ensure case strength
and electrical ground continuity.
1. Input Board
2. Input Rectifier Diode Module
3. Output Board
4. Inverter Board
5. Fan
9
MAJOR COMPONENTS LOCATION
INVERTEC
1
3
8
7
Page10
THERMAL PROTECTION
Thermal detection device 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 temperatures should occur, the yellow
LED will light and the detection device will prevent output
voltage or current.
These detection device 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 corrected.
®
270SX
6. Mains Switch
7. Control Board
8. Output Transformer
9. Output Studs
2
5
6
4