Arcoweld ArcoMiG LCD 250C, Operator'S Manual

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MAINTENANCE &TROUBLESHOOTING
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within 10 minutes when it outputs the rated welding current.
The relation between the duty cycle “X” and the output welding current “I” is shown as the
right figure.
If the welder is over-heat, the IGBT over-heat protection unit inside it will output an instruction
to cut output welding current and brighten the over-heat pilot lamp on the front panel. At this
time, the machine should be relaxed for 15 minutes to cool the fan. When operating the machine
again, the welding output current or the duty cycle should be reduced.
3.3 Movement and placement
Please take care when moving the welder when moving it, and do not sit it on uneven ground.
It also can be moved by the handle on the top of the welder. Place the welder carefully when
moving it to the right position. When the machine gets to the destination, it needs to be secured
to prevent movement.
Movement may result in the potential danger or substantive hazard, so please make sure that the
machine is in a safe position before using it.
3.4 Power supply input connection
ArcoMig 250C welding machines’ power supply connects to 220V.
When the power supply voltage is over the safe work voltage, there are over voltage and
under voltage protection inside the welder, the alarm light will on, at the same time, the current
output will be cut off.
If the power supply voltage continually goes beyond the safe work voltage range, it will
shorten the welder lifespan. The below measures can be used:

Change the power supply input net. Such as connect the welder with the stable power supply
voltage of distributor;
 Reduce the machines workload and ensure input supply is regular.
 Set the voltage stabilization device in the front of power cable input.