EWM T 4.00 - AC/DC Comfort 2.0 Operating Instruction page 10

Machine control – Operating elements
Overview of control sections
Item Symbol
6
7
8
9
10
11
12
13 VRD
14 Hold
15
16
17
18
10
Description 0
Welding procedure push-button
--------- TIG welding
---- MMA welding (signal light turns green)
---- Arcforce setting (signal light turns red)
Display switching push-button
kW ------- Welding power display
V --------- Welding voltage display
JOB ----- Display and setting of the JOB number with the control button
Welding data display (3-digit)
Displays the welding parameters and the corresponding values > see 3.2 chapter
Filler wire welding signal light
For machines with filler wire only (AW) > see 4.3 chapter
TIG ignition type signal light
Signal light on: Lift arc ignition active/HF start off. You can switch the ignition type in the
Expert menu (TIG) > see 4.1.20 chapter.
Character function signal light
Indicates that it is possible to weld in an environment with major electric hazards, such
as in boilers. Service must be informed if this signal light is not on.
Coolant fault signal light
Comes on when pressure is lost in the coolant circuit. Check coolant level and ensure
that coolant circuit is leak-tight.
Voltage reduction device (VRD) signal light
The VRD signal light is illuminated when the voltage reduction device is operating
without fault and the output voltage is reduced to a value specified in the relevant
standard (see technical data) > see 4.6 chapter. The voltage reduction device is only
active on VRD machine versions.
Signal light Status display
After each completed welding task, the last values used in the welding process for the
welding current and welding voltage are shown on the displays, and the signal light will
be on
Excess temperature signal light
In case of excess temperature, temperature monitors de-activate the power unit, and
the excess temperature control lamp comes on. Once the machine has cooled down,
welding can continue without any further measures.
Access control active signal light
Signal light is on when access control is active on the machine
control > see 4.5 chapter.
Simultaneous AC welding on both sides, signal light
This signal light indicates that the function is active > see 4.1.18 chapter.
Automatic AC frequency > see 4.1.16 chapter
099-00T400-EW501
21.10.2016