Turning On The Power Source; Fan Control; Overheating Protection; Cooling Unit - ESAB Aristo Mig U5000i 400 V Instruction Manual

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6.2

Turning on the power source

Turn on the mains power by turning switch (7) to the "START" position. Release the
switch, and it will return to the "1" position.
If the mains power supply should be interrupted while welding is in progress, and
then be restored, the power source will remain de--energised until the switch is again
turned manually to the "START" position.
Turn the unit off by turning the switch to the "0" position.
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.
6.3

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 180 A, and at full speed for
higher currents.
6.4

Overheating protection

The power source has three 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.
6.5

Cooling unit

Water connection (TIG welding)
The cooling unit is equipped with a detection system ELP (ESAB Logic Pump)
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 gun 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 gun 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
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.
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