Emerson U/300/S/12P, U/300/S/6P LCD Screen Types, EPO Button, Start Screen, Current record window

32 Chapter 4 Operator Control And Display Panel

Current record window

Keeps a log of current alarms, ignores transient conditions that have been resolved. Use F1, F2 and F3 to read the alarm messages.

For a complete history log, refer to the Records menu in Table 4-6. Refer to Table 4-8 for a complete list of UPS alarm messages.

Keypad window

The function of menu keys F1 to F4 and HELP is shown by a self-explanatory icon as appropriate for the particular window.

4.1.6 EPO Button

As shown in Figure 4-3, the UPS door provides an emergency power off (EPO) button. It is housed beneath a safety cover to prevent inadvertent operation. After the EPO button has been pressed and hold for 2 seconds, it disables the static switch block entirely (so removing load power). It also disables the rectifier and inverter, and trips the battery circuit breaker. Under normal circumstances it does not remove UPS input power since this is applied through a manually controlled external isolator; however, if the UPS input supply is connected through circuit breaker having an electrical trip facility, the EPO switch can be used to drive the external circuit breaker’s trip circuit so as to remove the UPS input power.

Emergency power off (EPO) button

Figure 4-3 Emergency power off button

4.2 LCD Screen Types

4.2.1 Start Screen

Upon UPS start, the UPS executes system test, and the start screen will appear and remains approximately 15 seconds, as shown in Figure 4-4.

Figure 4-4 Start screen

HIPULSE U UPS Single Module And “1+N” (Expandable) 160/200/300/400kVA User Manual