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machine is operating in environment where there is no heavy accumulated dust, the machine need remove dust once a year. If
in the environment where is polluted with smokes and polluted air, it is needed to be removed once or even twice of each season.
c) To maintain good contact with cable and plugs.
d) Check up the contact conditions of cable and plug frequently, at least once a month for stationary use.
warning
Due to high voltage in the main circuit of the welder, you need to do the safety precaution measure to prevent acciden-
tal electric shock. Don't open the shell except for the professionals. Remember to turn off the power before removing
dust. And don't meddle with the connections and components when doing this work.
6. basic troubleshooting
NUM.
DESCRIPTION
1
Abnormal indicator
2
Current knob broken
Motor fan can't work or
3
low rotational speed
4
No open circuit voltage
Electrode holder cable is
5
too hot; output terminals
are too hot
6
Power off
7
Other problems
warning
The machine has the function of prohibit switching power supply in rapid succession within a short period of time for
switching on and off. The power will not open then (the indicator light is not on or the fan does not work or there is
no-load voltage). Shut down the power switch and resume back to normal after a few minutes.
POSSIBLE CAUSE
Bad ventilation leads to overheating
protection.
High environmental temperature.
Exceed rated duty cycle.
Potentiometer damaged.
Bad power switch.
Bad fan.
Led broken.
Overheating.
Bad power switch.
Capacity on electrode holder is too
small.
Cable is too thin.
Socket is loosen.
Power capacity is not big enough.
Welding process
11
REMEDY
Improve ventilation conditions.
Automatic recovery after decreasing.
Replace potentiometer.
Replace it.
Replace the switch.
Replace the fan.
Check the circuit.
See point 1
Replace the switch.
Replace larger capacity electrode
holder.
Replace a proper cable.
Remove the oxide coat and re-tight
it.
Enlarge the capacity.
Contact the supplier
Contact the supplier
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