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Contents
Service Manual ............................................................................................................................................. 1
Dear Service Technician ............................................................................................................................... 2
General remarks ...................................................................................................................................... 2
Safety ....................................................................................................................................................... 2
Safety rules ................................................................................................................................................... 7
General remarks ...................................................................................................................................... 7
Utilisation for intended purpose only ......................................................................................................... 8
Ambient conditions ................................................................................................................................... 8
Obligations of owner/operator................................................................................................................... 8
Obligations of personnel ........................................................................................................................... 8
Personal protective equipment ................................................................................................................. 9
Hazards from noxious gases and vapours ............................................................................................... 9
Hazards from flying sparks ....................................................................................................................... 9
Hazards from mains and welding current ............................................................................................... 10
Hazards when the machine housing is open .......................................................................................... 10
Vagrant welding currents ........................................................................................................................ 10
EMC precautions .....................................................................................................................................11
Particular danger spots ............................................................................................................................ 11
Informal safety precautions .................................................................................................................... 12
Safety precautions at the installation location ......................................................................................... 12
Safety precautions in normal operation .................................................................................................. 12
Safety inspection .................................................................................................................................... 12
Alterations to the power source .............................................................................................................. 13
Spares and wearing parts ....................................................................................................................... 13
Calibration of power sources .................................................................................................................. 13
CE-marking ............................................................................................................................................ 13
Copyright ................................................................................................................................................ 13
Technical data - Rating plate ....................................................................................................................... 14
Rating plate ............................................................................................................................................ 14
Identification ........................................................................................................................................... 14
Data regarding weld process .................................................................................................................. 14
Duty cycle ............................................................................................................................................... 15
Data regarding power supply .................................................................................................................. 16
Standard characteristic ........................................................................................................................... 16
Set-up regulations .................................................................................................................................. 17
Mains connection ................................................................................................................................... 17
General basics - Functional principle .......................................................................................................... 18
Inverter principle - General remarks ....................................................................................................... 18
Resonance converter ............................................................................................................................. 18
Series resonance converter.................................................................................................................... 19
Series-parallel resonance converter ....................................................................................................... 19
Increasing the output voltage by means of series-parallel resonance ..................................................... 20
Limiting the increased output voltage in open circuit ............................................................................... 20
Complex regulation ................................................................................................................................ 20
Applying the resonance converter principle ............................................................................................ 21
Measuring and regulating the parameters “welding current” and “welding voltage” ................................ 21
Hot-Start and Anti-Stick functions ........................................................................................................... 22
“TIG-Comfort-Stop” function ................................................................................................................... 24
Gas flow ................................................................................................................................................. 25
VRD - Voltage Reduction Device ............................................................................................................ 25
General basics - how to handle components .............................................................................................. 27
ESD precautions .................................................................................................................................... 27
Heat dissipation from power componentry.............................................................................................. 28
General basics - packaging......................................................................................................................... 30
Delivery .................................................................................................................................................. 30
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