American Power Conversion 240-320kW 480V manual Lamp indication on Bypass Panel

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

7.Set the output switch (Q004) to position 0

8.Set all output switches (Q002) to position 0

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

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

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

(Q010) to position 0 (dual utility)

The red alarm LED below the display lights up and the acoustic alarm sounds for 30 secs*

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

H003 switches off

H002 and H004 still on

H002 and H004 still on

Display shows

**System OFF**

*Reset the acoustic alarm by pressing the key.

	990-4039
User Guide APC Silcon 240-320kW 480V UPS	13