Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 24
14. THE LCD DISPLAY
The LCD displays Real Time information as to the status and operation characteristics of
the UPS system and battery banks. In order to make the display sharp and readable, the
LCD is back-lit by LED’s. To prolong the life of the LED, the CPU will cut off the power of
the LED 3 minutes after the last key has been pressed. The backlight will illuminate
whenever a key has been pressed. This screen will pop up once the system power is
enabled (i.e. the default screen).
14.1. Menu 0 – Main Menu
The first row will display the greeting content set by the factory. The model no. (MODEL),
serial no. (S/N), and the identification no. (ID) are displayed in the second row. The third
row will display the kVA rating, input rating and output rating of the UPS.
The serial no. is set by the factory for the convenience of maintenance personnel who
may need to refer to the serial number for the correct spare parts and testing
procedures. The identification no. is set only when multiple UPS systems are
connected in parallel. Each UPS must have a unique number to identify itself, and will
be set by a factory trained technician after installation. The YEAR/MONTH/DATE, DAY
OF THE WEEK, HOUR, MINUTE and AM/PM from the real time clock inside the UPS
are displayed in the fourth row for user’s reference and for stamping the date and time
in the historical data when an abnormal conditions occurs. By pressing one of the
UP(↑), DOWN(↓) or ENTER(↵) keys, the LCD will change to another screen.
W E L C O M E T O A L WA Y S O N U P S S Y S T E M S I N C
M O D E L : N
X
- S E R I E S S / N : 3 4 5 6 7 8 9 0 I D : 0 1
5 0 K V A I : 1 2 0 2 0 8 V 6 0 H Z O : 1 2 0 2 0 8 V 6 0 H Z
2 0 0 2 0 2 0 1 T U E 0 8 : 0 0 A M
Figure 14.1.1
Main Menu Dis
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