American Power Conversion 480kW400V - Manual (Page 9)

Stop/Start UPS and Operating the External Service Bypass
990-4058
User Guide APC Silcon 480kW 400V UPS 9
2.5 Operating the External Service Bypass Switch (single systems)
2.5.1 Bypassing the Single System UPS
APC Silcon
UPS
Mains Load
Service Bypass
Switch
Action
1. Press on the keyboard
2. Press or on the keyboard until
3. Press on the keyboard
4. Press on the keyboard
5. Check light indication on the bypass panel
6. Set the external bypass switch (Q003) to position 1
7. Set the output switch (Q002) to position 0
8. Open the front door and press the green ON and
the red OFF button simultaneously
The acoustic alarm sounds for 30 seconds*
9. Set the input switch (Q001) to position 0
The red alarm LED below the display lights up and
the acoustic alarm sounds for 30 seconds*
*Use the key to reset the acoustic alarm
Display shows
Bypass operation
: NO
**System OFF**
Bypass operation
: YES
Lamp indication on
Bypass Panel
Green light (H003)
above the bypass switch
handle (Q003) lights up
Green light (H002)
above the output switch
handle (Q002) lights up
Only the light (H002)
above the output switch
handle (Q002) is now on
Display shows