ESAB Mig C420 Manuel D'instructions page 11

GB
6.2 Functions explanation
The ESABMig C420 is equipped with standard control unit. Welder can manually
select and adjust all welding parameters.
S Wire speed 75 – 1000 ipm (1,9 – 25m/min) is set with knob [12].
S The stroke control (2/4 stroke) is selected with switch [13].
Creep start i.e. start with 50% wire speed is toggled ON/OFF with switch [14].
S
Burn back time is set with knob (0 – 0,5 sec) [15].
S
Digital instrument displays continously the actual welding current and voltage, when
welding process is stopped – the last values are memorised (HOLD – function).
6.2.1 Start
When machine is switched on by the mains switch [1], indicating lamps [4,5] are
checked for 2 seconds. Normally, if the machine is not overheated, it should start to
work in idle mode, which is indicated by blinking of the supply–ON lamp [4]. The fan
is stopped and starts from the first start of welding.
6.2.2 Overheating protection
The power source has 2–step control of fan speed and overheating protection.
If temperature crosses the threshold point, the fan starts to run with increased
speed. If the internal temperature becomes too high, the welding is interrupted and
disabled. This state is indicated by permanent lighting of the orange indicating lamp
on the front of the unit. It resets automatically when the temperature falls down.
6.2.3 Idle mode
The machine can run in the idle mode. The fan is switched off 5 min after the end of
the last welding, or after 5 min of run with decreased speed without welding, then
the power supply lamp [4] on the front panel is blinking.
C420e1
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