LORCH V27 - Table of Contents

page 2
Document no. 909.0340.1-05
Issue date: 10.03.2021
Contents
Machine ........................................................................... 3
Safety precautions ........................................................... 4
Common Logic functions ................................................. 5
Inverter Principle.............................................................. 6
Pc-board DK-MAPRO...................................................... 7
Pc-board DK-DCI40 / DK-ACI40 ................................... 10
Pc-board DK-DCI45 / DK-ACI45 ....................................11
Pc-board DK-DCDRV .................................................... 13
Pc-board DK-ACDRV .................................................... 18
Pc-board DK-PWRUP ................................................... 20
Pc-board DP-S3NEFI .................................................... 21
Pc-board NEFI3x32 ....................................................... 22
Pc-board DK-GLCL3 ..................................................... 24
Pc-board DK-KSDC / DK-KSDCD / DK-KSDCN ........... 25
Pc-board DK-HFDC / DK-HFDC HV .............................. 27
Pc-board DK-UFI ........................................................... 29
Pc-board DK-EMV ......................................................... 29
Pc-board LSW ............................................................... 30
Current sensor VAC ....................................................... 30
Control transformer........................................................ 31
Temperature monitoring................................................. 32
Supply voltages ............................................................. 33
Monitoring welding current ............................................ 34
Monitoring welding voltage ............................................ 35
Cooling unit.................................................................... 36
Torch control .................................................................. 38
Remote control interface ............................................... 39
Monitoring primary current............................................. 40
Power-up cycle .............................................................. 41
Monitoring bus voltage .................................................. 42
Identication power units ............................................... 43
Checking MOSFETs ...................................................... 44
Inside diagram diodes ................................................... 45
PE protection (optional) ................................................. 45
List of error codes .......................................................... 46