APC 480kW 400V manual Acoustic alarm sounds for 30 secs

Stop/Start UPS and Operating the External Service Bypass

Action

Steps 1-4 apply to all the parallel systems. Note that this will switch all systems into bypass operation

1.	Press	on the keyboard		Display shows
2.	Press	or	on the keyboard until	Bypass operation
				: NO
3.	Press	on the keyboard		Bypass operation
				: YES
4.	Press	on the keyboard

All systems switch to bypass operation

Do not switch off any of the UPS systems until steps 5-8 have been completed

5.Check light indication on the bypass panel

6.Set the external bypass switch (Q003) to position 1

Bypass operation

Lamp indication on Bypass Panel

Green light (H003) above the bypass switch handle (Q003) lights up

Green light (H004) above the output switch handle (Q004) and green lights (H002) above the output switch handles (Q002) light up

7.	Set the output switch (Q004) to position 0	H003 switches off
		H002 and H004 still on
8.	Set all output switches (Q002) to position 0	H002 and H004 still on

9.Open the front door of any one system and press the green ON and the red OFF button simultaneously

The acoustic alarm sounds for 30 secs* Repeat for (all) other system(s)

10.Set all input switches (Q001) to position 0

The red alarm LED below the display lights up and

the acoustic alarm sounds for 30 secs*

*Reset the acoustic alarm by pressing the key.

Display shows

**System OFF**

990-4041

14 User Guide APC Silcon 480kW 400V UPS