10 | P a g e
TROUBLESHOOTING
All parts of the fan are sealed such that extra maintenance is not required for the fan.
When operated at dusty place, the machine’s air duct may get plugged to cause the machine
overheated, therefore, remove inside of the machine’s dust with dry compressed air regularly.
Overload protection
The thermostat inside the welding machine can effectively protect important power devices with
overload or insufficient cooling, by the thermostat switch. When the machine is continuously
overloaded or the power device IGBT and fast recovery diodes are not cooled adequately, the
over temperature indicator will be lighted and normal output of the machine will be stopped. When
these components are sufficiently cooled, the over temperature indicator will be off and the voltage
output of the machine returns to normal.
Under-voltage protector is equipped in the machine control circuit to stop operation of the machine
when the input voltage is too low. When the input voltage is not within limits, the output of the
machine will stop. If no voltage is available at the output terminals and the power signal is on while
the overheat indicator is off, please check the input supply voltage.
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