7
5. STAND BY
The machine stops its main functions when it is not continuosly used,
in order to reduce the power consumption at 10W; the “STANDBY” icon
lights. The fan works only when the machine needs to be cooled down;
during light applications, the fan normally doesn’t work.
The water cooling unit, if any, works only on MIG process; at the end of the mig weld-
ing process, it works for further 180 sec.
6. VRD - VOLTAGE REDUCTION DEVICE
This feature reduces the output no load voltage <25V.
It increases the safety conditions of the operator: the no load volt-
age is not dan-gerous but any contact between human body and
live parts may cause a shock with lost of equilibrium control or
similar.
The VRD feature is activated with “VRD” light on. The feature is always “on”:
the system grants ecient arc stricking even with a no load voltage <15V.
On manual MIG process it becomes automatically “o”.
To set the VRD on On or O, push the pushbutton for ten seconds up to the icon
VRD light on or the icon V>20 light on
7. ALARMS AND SETTINGS
The power sources Multi synergic are completed with a monitoring system of the
machine conditions in order to avoid failure in the machine and in the welding.
In particular the alarms involve in:
Power supply quality in the voltage, in the missing phase, in the frequency.
Output welding conditions, short circuit or welding over limits Inverter over heating
or over load or over current.
Auxiliary electronic warning and failure wire feeder status water cooling unit status
communication with the external wire feeder.
REFER TO THE TROUBLESHOOTING, PARAGRAPH FOR THE DETAILS
8. POWER SUPPLY QUALITY IN THE VOLTAGE, IN THE MISSING
PHASE, IN THE FREQUENCY:
The tri-phase welding generators have an input voltage of 400V ( min 340V – max
480V). MULTI SYNERGIC versions can be supplied with motor generators and/or
long cables (within the min/max input voltage limits).
In case current exceeds the mentioned limits (current peaks), machine functions
stop and display shows the detected current peak.
Reset the machine by switching the main ON/OFF knob.
The tri-phase version detects even the right presence of the three current phases
and, should one of those fail for > 20 m/s, machine functions stop and display
will show the missing phase. Again, reset the machine by switching the main ON/
OFF knob.
In the case of shift of supply net frequency the machine is stopped an the ap-
propriate alarm is shown in the display (this case can occurs when the supply is
coming from motor generator and the the frequency goes outside the limits of
50-60 Hz.
9. OUTPUT WELDING CONDITIONS, SHORT CIRCUIT OR
WELDING OVER LIMITS
A circuit test is released every time you switch “ON” the machine. The correct
output polarities are checked-out and in case of an eventual short circuit detec-
tion, machine enters in alarm standby showing on the display:
Once short circuit conditions are removed, machine test will continue correctly.
Short circuit conditions may appear even during the welding job: in case they
persist continuously for more than 5 sec, generator enter in “short circuit alarm”.
The “anti sticking” icon lights too.
Fires, burns and shocks may be caused by uncorrected current outputs.
Reasons may be found on:
• involuntary failures on mig jobs which may release, without any control, the
weld ing wire: it melt entering in contact with negative polarities generating pos-
sible fire and burn conditions
• damaged cables, with insulation losses, etc.
In case of any output failure, the machine enters in alarm condition showing: ALL
OUT
