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DESCRIPTION OF PROTECTIVE DEVICES
Thermal protection
This machine is protected by a temperature probe, which
prevents the machine from operating if the allowable
temperatures are exceeded. Under these conditions the fan
keeps running and the LED
J
lights. The duty cycle of the
welder has been exceeded if the welder overheats.
Duty cycle of a welding power source is the percentage
of a ten minute period that the welder can operate without
causing harm to the welder. Ex. A 60% duty cycle means
that the welder can operate for 6 minutes and should cool
for 4 minutes.
Block Protections
This welding machine is equipped with various safety devices
that stop the machine before it can suffer damage.
In the event of a malfunction, the letter E may appear on the
display
Z
, followed by a flashing number:
52 = Start button pressed during startup.
53 = Start button pressed during thermostat reset. In both
cases, release the start button.
The machine stop is signaled by the flashing LED
J
.
When this occurs, it signals:
1) During the start-up phase, the power status of the
machine.
2) After the start-up phase, incorrect supply voltage.
3) With the machine running, that the voltage has fallen
below 118V.
4) With the machine running, that the supply voltage is above
280V.
5) During welding, that the voltage exceeds 300V.
switch, wait 5 seconds, and switch it on again. If the problem has
been corrected, the welding machine will begin operating
again.
NOTE: If the supply voltage is below 170V at start-up, no LED
will light and the fan is powered.
If the message E2 appears on the display, the machine
requires technical service. 800-ABC-WELD
TIG WELDER MAINTENANCE
Any maintenance operation must be carried out by qualified
personnel.
GENERAL TIG WELDER MAINTENANCE
In the case of maintenance inside the machine, make sure
that the switch
AF
is in position "O" and that the power cord
is disconnected from the mains. It is also necessary to
periodically clean the interior of the machine from the
accumulated metal dust, using compressed air.
PRECAUTIONS AFTER REPAIRS.
After making repairs, take care to organize the wiring so that
there is secure insulation between the primary and secondary
sides of the machine. Do not allow the wires to come into
contact with moving parts or those that heat up during
operation. Reassemble all clamps as they were on the original
machine, to prevent a connection from occurring between the
primary and secondary circuits should a wire accidentally
break or be disconnected.
Also mount the screws with geared washers as on the original
machine.
TROUBLESHOOTING/MAINTENANCE
To restore operation, check the voltage. Then shut off the
AC
