Connection And Preparation Of Equipment For Gtaw (Tig Lift) Welding; Functions; Front Panel - Oerlikon CITOARC 2200 VRD Instrucciones De Seguridad, Empleo Y Mantenimiento

3.4 CONNECTION AND PREPARATION OF EQUIPMENT FOR
GTAW (TIG LIFT) WELDING .
• SWITCH THE WELDING MACHINE OFF BEFORE CARRYING
OUT THE CONNECTIONS.
Connect the welding accessories carefully in order to avoid power
losses or dangerous gas leaks. Carefully comply with the safety
rules.
1. Select TIG LIFT welding mode (Section 9 ).
2. Fit the required electrode and gas-guide nozzle on the elec-
trode holder torch. (Check the condition of electrode tip and
protrusion).
3. Connect the earthing lead connector to the quick-release
positive terminal (+) and the clamp near the welding zone.
4. Connect the torch power cable connector to the quick-re-
lease negative terminal (-).
5. Connect the gas pipe to the regulator on the gas bottle.
6. Adjust the welding current to the required value (Section 12).
7. Adjust the welding parameters (upslope and downslope) to
the required values.
8. Open the gas cock.
9. Remote control connection.
To use the remote control, connect the remote control con-
nector to the socket on the front panel. In this condition the
current can be adjusted independently of the setting made on
the generator.
10. Switch the generator on.
4.0

FUNCTIONS

4.1

FRONT PANEL

Picture 1.
4
3
2
8
9
10
1
1. REMOTE CONNECTOR (Rif.1 - Picture 1 Page 4.) : the re-
mote control can be connected by means of this connector.
With this accessory the welding current can be varied with
continuity without leaving the work zone. Remote control
connection is signalled on the display for a few seconds
(Rif.4 - Picture 1 Page 4.) by the message "rEn".
2. VRD FUNCTION INDICATOR (Green) (Rif.2 - Picture 1 Page
4.): this indicator light up whem VRD function is activated.
3. ALARM INDICATOR (Yellow) (Rif.3 - Picture 1 Page 4.): this
indicator lights up when the generator does not work due to
FUNCTIONS
an alarm. Given below are the possible alarms signalled on
the display, their meaning and operations to be carried out to
restore generator operation.
SIGNALLING
ON THE DISPLAY
(Meaning)
- - -
(Line alarm)
thA
(Thermal alarm)
ScA
(Short circuit alarm)
PiF
(Inverter alarm)
FXX
(Hardware anoma-
ly)
EEE
(Software anomaly)
4. DIGITAL DISPLAY (Rif.4 - Picture 1 Page 4.): indicates the
set welding current, in particular:
- During welding it indicates the generator output current.
- In the welding parameter modification phase it indicates the
actual value of the quantity selected.
- In alarm conditions it identifies the type of alarm activated.
5
5. HOT START/ARC FORCE RATE INDICATOR (Rif.5 - Pic-
ture 1 Page 4.) : this indicator lights up when the HOT
6
START or ARC FORCE percentage value set for the MMA
welding process is being displayed.
7
6. UP/DOWNSLOPE TIME INDICATOR (Rif.6 - Picture 1 Page
4.): this indicator lights up when the up/down time (in sec-
12
onds) of the current slopes associated with the LIFT TIG
welding process is being displayed.
11
7. WELDING CURRENT INDICATOR (Rif.7 - Picture 1 Page
4.): this indicator lights up when the set current value (in am-
peres) or read value (in the case of welding in progress) is
being displayed.
8. MMA COATED ELECTRODE WELDING INDICA-
TOR (Rif.8 - Picture 1 Page 4.): normal basic and rutile coat-
ed electrodes can be welded in this mode.
9. TIG WELDING WITH LIFT START INDICATOR
(Rif.9 - Picture 1 Page 4.) : this TIG welding mode is carried
out with the following procedure:
ARC STRIKING:
touch the workpiece with the electrode to
cause short-circuiting between the work-
piece (2) and electrode (1) then lift it to
strike the arc. The integrity of the electrode
tip is guaranteed by a low striking current
during the short circuit between workpiece
and electrode. Striking is always perfect
even at minimum welding current setting
and enables work to be performed without
polluting the surrounding environment with
the very strong electromagnetic interfer-
ence typically caused by high frequency
discharge.
The advantages can be summarized as
follows:
4 EN
CAUSES - CURE
Power supply voltage, main switch off or no
phase.
Restore the correct generator power supply.
Fault in supply/control stage.
Contact Technical Assistance.
Power converter overtemperature due to exces-
sive work cycle.
Stop welding and leave the generator on until the
alarm ceases.
Generator output terminals short-circuited.
Eliminate the short circuit.
Fault in output stage.
Contact Technical Assistance.
Inverter stage fault.
Contact Technical Assistance.
Malfunction in generator control stage ("XX" is a
number identifying the type of fault).
Contact Technical Assistance.
Contact Technical Assistance.
EN