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ENG
Operation Manual RT-500/RT-800/
RT-1000
Cold start function
• The UPS can be switched on without connection to the mains using the cold start function. In
order to switch on the UPS, press and hold down the button k within 4 sec. The buzzer beeps four
times, the output voltage indicator a displays the figure “220” and the power will be supplied to
devices-consumers.
Note. It is not recommended to use the cold start function when the connected load is large.
Sound alarm and protection
• At the instant the UPS starts to use power from batteries (when there is power failure), it beeps
4 times. Then the UPS beeps every 30 seconds, when it operates from batteries. This function can
be switched off. To do this, press and hold down the button j within 2 sec., the buzzer beeps one
time and signals will be over. When beeps are required, repeat the procedure. You can also to turn
off all sound signals by pressing the button l on the rear panel of UPS. Press the button l to turn
on all sound signals.
• If the battery capacity is low (while operating from batteries), the UPS beeps every second. When
the batteries are fully discharged UPS will frequent beeps for 20 seconds and then turns off
automatically. If you turn off the button beeps l, signal low battery charge will not supplied.
• When the battery residual voltage is lower than 10.5 V, the UPS is switched off.
• When load is too high (110 – 120 %), the UPS delivers frequent intermittent warning beeps within
20 sec., then it will turn off the load automatically. When load is 120 % or more the UPS delivers
a single beep and then it is turned off automatically.
• When the UPS protection is activated, load power supply, turn on the device again by pressing
the front panel button.
Three-stage switch of charging current
It enables the user to connect batteries of different capacities depending on the required time of
providing back-up power.
Table 2. Selection of the charging current for a battery depending on its capacity
Charging current
Switch position
Battery capacity
from 20 to 50 А · h
low (3 A ~ 5 A)
L
from 50 to 100 А · h
middle (7 A ~ 9 A)
M
from 100 to 200 А · h
high (13 A ~ 15 A)
H
Storage conditions
• The temperature and humidity conditions in premises, where the device placement is intended,
must correspond to the norms indicated in the Technical Specifications table.
• The UPS must be stored with batteries full charged.
• Storage conditions of batteries should comply with the manufacturer’s requirements.