American Power Conversion 480kW400V - Manual (Page 13)

Stop/Start UPS and Operating the External Service Bypass
990-4058
User Guide APC Silcon 480kW 400V UPS 13
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
2. Press or on the keyboard until
3. Press on the keyboard
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 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
Bypass operation
: NO
Bypass operation
**System OFF**
Bypass operation
: YES
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