Commissioning
Cooling unit function specification
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Item No.: 099-004877-EWM01
6.8.2
Connection for workpiece lead
• Insert cable plug of the workpiece lead into either the "+" or "-" welding current connection socket and
lock by turning to the right.
Polarity depends on the instructions from the electrode manufacturer given on the electrode
packaging.
The welding current polarity can be reversed on the machine control
(see chapter "Function specification – reversing the welding current polarity").
6.9
Cooling unit function specification
A functional test is performed on the cooling module after the welding machine has been switched on.
The coolant pump and the fan are switched on.
When the coolant level is sufficient and enough hydrostatic pressure has built up, the cooling module is
then switched off after 25 seconds.
If the level is too low, the coolant pump continues to run for a maximum of 30 seconds. An error message
is displayed, see also chapter “Operating Problems, Causes and Remedies”.
The cooling unit is switched on at the start of the welding process.
Once the welding process has been completed, the water pump and fan continue to run for 5 minutes.
If the coolant pressure drops during the welding process, e.g. due to insufficient coolant, pump failure or a
defective tube, the welding process is terminated (coolant pump and the welding machine power unit are
shut down), see also chapter “Operating Problems, Causes and Remedies”.
6.9.1
Coolant error
If the coolant pressure drops during the welding process, e.g. due to insufficient coolant, pump failure or
defective hose, the welding process is terminated deliberately (coolant pump and the welding machine
power unit are shut down, please as well see chapter “Operating faults, causes and cures”).
When the welding process is re-started, the coolant error is reset and the cooling module is switched on.
If there is still no build-up of coolant pressure, the cooling unit is shut down and the welding process is
terminated.
6.10
Simultaneous welding on both sides, synchronisation types
This function is important for carrying out welding on both sides simultaneously by two welders. This is
sometimes the case with thick aluminium materials in the V-up position, for example. This ensures that
when using alternating current the plus and minus pole phases occur simultaneously on both power
sources ensuring that the arcs do not have a negative effect on one another.
6.10.1
Synchronisation via mains voltage
This application relates to two types of synchronisation:
• Synchronisation between a machine in the TETRIX series and a competitor’s machine
• Synchronisation between two machines in the TETRIX series
Phase sequences and rotating fields of the supply voltages must be identical for both welding
machines. It is possible to retrofit the "TSyn1" option (accessories) into a machine (rotary dial on
the rear of the machine). The phase sequence can be variably adjusted with this rotary dial and
optimised for the welding task.
All welding machines (except frequency, 50 Hz fixed) are set separately.
