33
6 - ACTIVATING THE VRD DEVICE
MMA
The Voltage Reduction Device (VRD) is a safety device that reduces voltage. It prevents voltages forming on the output termi-
nals that may pose a danger to people. The standard settings and those defined beforehand by do not provide for the VRD to be
active on the welding machine and so the
DISPLAY
does not normally provide any indication.
If the operator wishes to weld in MMA using the VRD device (which must be done with the welding machine switched off), they must:
1) Use a suitable screwdriver to unscrew the 4 screws that fix the control panel to the welding machine.
2) Remove the “VRD” JUMPER on the DIGITAL INTERFACE PCB (see figure).
3) Use a suitable screwdriver to tighten the 4 screws that fix the control panel to the welding machine.
4) Start the welding machine by turning the switch on the rear panel to position I.
When it switches on, but with the machine in stand-by, the control panel shows that the VRD device is active (indication on the
DISPLAY
green colour - see enclosed image: MMA - PRE-SETTING).
D
iSpOSiTiVO
VRD
A
V
60 70.0
MMA Cr Ni
PROGRAM 3200
During the welding phase the VRD device is activated (indication on the
DISPLAY
red colour (does not indicate malfunctioning
of the welding machine) - see enclosed image: MMA - WELDING) and when welding is ended the voltage will be reduced with-
in a maximum time of
0,3
seconds.
Summary of Contents for DIX PI 3006.M PULS
Page 10: ...10 2101EA86 Wiring diagram ...
