ESAB Aristo Mig 4000iw, Instruction Manual

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5 OPERATION
0459 419 401 - 14 - © ESAB AB 2017
Whether in the event of a loss of power supply or of turning the power source off in the
normal manner, welding data will be stored so that it is available next time the unit is started.
5.3 Fan control
The power source fans continue to run for 6,5 minutes after welding has stopped, and the
unit switches to energy-saving mode. They start again when welding restarts.
The fans run at reduced speed for welding currents up to 144 A, and at full speed for higher
currents.
5.4 Overheating protection
The power source has two thermal overload trips which operate if the internal temperature
becomes too high, interrupting the welding current and lighting the orange indicating lamp on
the front of the unit. They reset automatically when the temperature has fallen.
5.5 Cooling unit
To ensure problem-free operation, the installation height from the cooling unit to the welding
torch must be max. 7 m. Heights in excess of this can cause problems, such as long starting
times, air bubbles, vacuums, etc.
If an installation height in excess of 7 m is required, we recommend an installation kit
comprising a non-return valve and a solenoid valve, refer to accessories in chapter
"ACCESSORIES". Once these valves have been installed, the hose package must be
horizontal during the initial startup so that everything fills with water. Then raise the wire feed
unit and hose package to the high height. Continued safe operation at installation heights of
up to 12 m can now commence.
Water connection (TIG welding)
The cooling unit is equipped with a detection system ELP ( E SAB L ogic P ump) which checks
that the water hoses are connected.
The power source On/Off switch must be in the “0” position (Off) when connecting a
water-cooled TIG torch.
If a water-cooled TIG torch is connected, the water pump starts automatically when the main
On/Off switch is turned to ”START” and/or when welding starts. After welding, the pump
continues to run for 6,5 minutes, and then switches to the energy-saving mode.
Function when welding
To start welding, the welder presses the welding torch trigger switch. The power source turns
on and starts the wire feed and the cooling water pump.
To stop welding, the welder releases the welding torch trigger switch. Welding ceases, but
the cooling water pump continues to run for 6,5 minutes, after which the unit switches to
energy-saving mode.
Water flow guard (optional)
The water flow guard interrupts the welding current in the event of loss of coolant, and
displays an error message on the control panel. The water flow guard is an accessory.
5.6 Remote control unit
When the remote control unit is connected, the power source and wire feed unit are in
remote control mode; the buttons and knobs are blocked. The functions can only be adjusted
via the remote unit.
If the remote control unit is not to be used, the remote control unit must be disconnected from
the power source / wire feed unit, as otherwise it will remain in remote control mode.