IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 44 di 90 + FR
3.5.3 Standby-off (with mains present the load is not powered)
load not powered, in the event of an input mains failure the load is powered from the
inverter using the energy stored by the batteries.
Standby-Off:
if there is a mains power supply, UPS output is zero. The RECTIFIER remains on and
keeps the battery charged. The output voltage is only present when the mains power
supply fails. The system remains with output voltage = 0V while the voltage and the
input frequency are within the acceptance field. When the power supply line is
restored, the UPS is automatically repositioned in
Standby-Off
mode.
The letter
F
will be displayed on the second line of the BASIC MENU, near the UPS
model.
3.5.4 Stabilizer (operation in on-line mode without battery)
load powered from the inverter, if there is a mains failure the load is not powered, the
batteries are not present.
Stabilizer:
The load is always powered through the inverter, with stabilized voltage and
frequency, using the energy from the input mains. The batteries are not present. In
the event of an input mains failure, the output of the STABILIZER is not powered.
The letter
S
is displayed on the second line of the BASIC MENU, near the UPS model.