OPTI-UPS DS120KC33 - Manual (Page 43)

5-5 Introduction to LCD front panel and illustration of each function
Introduction to function keys on the front panel
→ button: Moves the page cursor to the right
← button: Moves the page cursor to the left
OFF button: “OFF” function key
ON button: “ON” function key
↑button: Moves up the page cursor
↓button: Moves down the page cursor
ENTER button: Execute/confirm setting
ESC button: Return to previous page
Use →,←,↑,↓ function key to select item on LCD menu and then press ENTER to enter the
category you need. Use → and ← key to move and enter into a setting field of 4 digits and use ↑
and ↓ key to select the number. Then Press ENTER key to confirm and execute the setting. If you
want to turn to another function, press ESC key to return to the previous page or press ESC key twice to
return to the main menu and use →, ←, ↑, ↓ key to select other functions.
5-6 Emergency shut down procedure
Introduction to EPO operation
EPO (Emergency Power Off) is a device for shutting down the UPS in case of emergency. If the EPO
is turned on, the following action will be performed:
(1) Stop Inverter immediately.
(2) Stop static switch immediately and the system won’t have output power.
(3) Stop rectifier charger system.
Except the above actions, the LCD panel will still remains active and keeps record on EPO time for
starting up and recovery. Meanwhile the UPS keeps communication with other device as it were.
For recovering from EPO, push the EPO switch while pressing the “OFF” button on the LCD panel
and a screen for confirming setting appears. Press “ENTER” button. The DSP system will respond in a
few seconds and “Setting complete” appears to indicate setting successfully. At the moment check the
voltage reading on the screen if the voltage of battery reaches to 410VDC. If it reads 410VDC, switch
off S4 breaker at once. The system will detect the battery for 30 seconds and after the procedure, DC
will recover and the UPS will transfer form Bypass mode to Inverter mode. At this point, the UPS is
powered by the INVERTER.