User guide

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