1800 Series User Manual
20
STARTING THE UPS SYSTEM
Ensure the input breaker is switched on (Figure, page 15). When the “AC
Input” LED is lit switch the RUN/STOP switch to the RUN position (RUN = I,
STOP = 0).
When the RUN/STOP switch is in the RUN position both the “AC Input” and
the “On Line” LEDs should be lit. It is advisable to allow time for the batteries
to fully charge before any load is connected (see “Battery Recharge Time”,
page 24).
STOPPING THE UPS
There are two ways to turn off the UPS: switching from online to bypass mode,
or completely shutting down.
OPTION 1
The rst option is to place the UPS into bypass mode. Bypass mode means
that if there is AC power available, the UPS will route power directly from
the input source to the connected loads without any conditioning. The UPS
inverter is off during this state, but the attached loads do not lose power during
the transition. To place the UPS into bypass mode, switch the RUN/STOP
switch to the STOP position. This mode is most often used manually during
maintenance operation or automatically upon the occurrence of an internal
UPS fault. (For more information concerning bypass mode see Appendix D:
Bypass Undervoltage / Overvoltage).
OPTION 2
The other option is to turn the UPS off completely. This means that in addition
to the UPS’s inverter shutting down, all power will be stopped to any
equipment attached to the UPS. To shut the UPS down completely, switch
the RUN/STOP switch to the STOP position. Then switch the input breaker off
(Figure, page 15). Once the input breaker has been switched off, all the LEDs
should turn off.
If the RUN/STOP switch is in the RUN position when the input breaker is
switched off, the unit will switch to battery backup mode. The unit will continue
to run for as long as the available battery reserves can support the connected
loads.
