26
1
5
8
3
6
10
2
9
4
7
11
12
13
8 – Start-Up, Shutdown and Bypass (continued)
8-10 Manual Bypass Procedure (Parallel UPS) (continued)
If the UPS systems have external battery cabinets connected, •
switch off the external battery cabinet circuit breaker switch
A
of
each battery pack.
In this mode, only the output circuit breaker switch •
A
and the
terminal block
B
contain hazardous voltage, allowing qualified
service personnel to perform maintenance or repair. Note:
Qualified service personnel may prefer to de-energize the UPS
systems completely, depending on local codes and the nature of the
maintenance or repair.
8-11 Switching from Manual Bypass to Normal Mode (Parallel UPS)
If the UPS systems have external battery cabinets connected, •
switch on the external battery cabinet circuit breaker switch
A
of
each battery pack.
Switch on the bypass input circuit breaker switch •
A
and the output
circuit breaker switch
B
of each UPS system.
Confirm that the LCD screens of both UPS systems read “ON •
MANUAL BYPASS”, then switch off the manual bypass circuit
breaker switch
A
of each UPS system. The LCD screen will read
“ON AUTO BYPASS”.
Switch on the main input circuit breaker switch •
A
of each UPS
system.
Press the ON button •
A
of the first UPS systems for 3 seconds
(until you hear a beep), then release the button. Press the ON
button for the second UPS system for 3 seconds (until you hear
a beep), then release the button. When the inverter of each UPS
system is operating normally, they will switch to online (normal)
mode at the same time.
5
1
5
5
1
6
2
3
4
5
A
A
6
A
2
3
4
B
Main
Input
O
OFF
ON
I
ON
I
ON
I
Front Panel
Back Panel
A B
Main
Input
O
OFF
ON
I
ON
I
O
OFF
Front Panel
Back Panel
A
Main
Input
ON
I
ON
I
O
OFF
ON
I
Front Panel
Back Panel
A
A
Back Panel
200803004 93-2793 SU80k manual 4C.indd E26200803004 93-2793 SU80k manual 4C.indd E26 6/16/2008 1:43:50 PM6/16/2008 1:43:50 PM
