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NAVIGATING THE ‘LCD’ CONTROL PANEL
System Setting
-
Selection and Adjusting
VRD Function
Voltage Reduction Device (VRD) is a hazard reducing circuitry inbuilt into welding power sources which is
used in the MMA/Stick welding process which reduces the open circuit voltage (OCV) when the voltage
output of the machine is ON but not welding to a safe voltage (normally under 20V). VRD has no effect
on arc starting.
The factory setting for VRD is ON and The VRD symbol will be
on show when the machine is in MMA mode and the output
voltage is limited to 12V when the machine is idle (as shown
right).
Please Note:
•
The VRD icon will go off when the welding arc is established.
•
VRD can be disabled although this requires a technician to carry out this task, please contact your
supplier for further details.
Alarm function
The Evo range of machines have inbuilt protection devices and in the unfortunate case of a malfunction,
an error code is indicated along with the corresponding error
description appears on the LCD display as the example right shows.
As long as an error code is shown, welding operation is generally
not possible.
There are seven alarm conditions that the machine can experience
as follows:
Overcurrent Protection (E10), Undervoltage Protection (E31),
Overvoltage Protection (E32), Data error alarm (E55),
Overheat Protection (E60), Overheat protection (E61), Water Cooler Alarm (E71)
See the trouble shooting section of the EM
-
200CT / EM
-
250CT PFC operating manual for further details
on error codes and troubleshooting them.
Screen (Saver) Protection Mode
When the machine is switched on but has not been operated or
used for a set period of time (standby time, see page 23 for further
details), the unit will enter into standby (idle) mode and the machine
will enter sleep mode although the screen display will only show the
protection image which is the Jasic logo (as shown right).
The machine will wake up immediately and the screen will show the previous data if either the torch
trigger, remote device or one of the control panel buttons are pressed.
