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8 – Start-Up, Shutdown and Bypass
8-9 Shutdown Procedure (Parallel UPS)
•
For the UPS system you wish to shut down, switch off the bypass
3
input circuit breaker switch
•
When the UPS system is completely shut down, the LCD screen
4
will be completely off. If the UPS systems have external battery
cabinets connected, switch off the external battery cabinet circuit
breaker switch
A
Note: If the UPS system remains off for an extended period of time, it
should be turned on periodically to allow the batteries to recharge. The
UPS system should be turned on and the batteries should be recharged
at least one uninterrupted 24-hour period every 3 months. Failure
to recharge the batteries periodically may cause irreversible battery
damage.
8-10 Manual Bypass Procedure (Parallel UPS)
Warning: When the UPS system is in manual bypass, the inverter shuts down. Connected equipment loads are powered by the bypass
power source and will not receive battery backup during a utility power failure.
•
For the first UPS system you wish to shut down, press the OFF
1
button
for 3 seconds (until you hear a beep), then release
A
the button. If the other UPS system can support the connected
equipment loads alone, the UPS system that was turned off will
shut down its inverter and its LCD screen will read "LOAD NOT
POWERED". The other UPS system's LCD screen will read
"ONLINE MODE". If the total connected equipment load is too
large to be handled by a single UPS system, both UPS systems
will shut down their inverters and switch to bypass mode, and their
LCD screens will read "ON AUTO BYPASS". Repeat step 1 for
the second UPS system you wish to shut down.
•
2
Switch off the main input circuit breaker switch
system.
•
3
Confirm that both UPS systems are shut down, then switch on the
manual bypass circuit breaker switch
bypass power source will power the loads and the LCD screen will
read "ON MANUAL BYPASS".
•
Switch off the bypass input circuit breaker switch
4
circuit breaker switch
will turn off completely.
200803004 93-2793 SU80k manual 4C.indd E25
200803004 93-2793 SU80k manual 4C.indd E25
A
.
of each battery pack.
A
of each UPS
A
of each UPS system. The
and the output
A
B
of each UPS system. The LCD screen
(continued)
(continued)
O
OFF
Main
Input
Front Panel
3
4
1
O
OFF
Main
Input
A
Front Panel
2
O
OFF
Main
Input
Front Panel
3
O
OFF
Main
Input
Front Panel
4
25
O
O
OFF
OFF
A
Back Panel
A
A
O
OFF
ON
I
Back Panel
ON
ON
I
I
A
Back Panel
O
OFF
ON
I
A
Back Panel
1
2
O
OFF
3
4
5
6
7
8
9
ON
I
10
11
ON
I
12
O
13
OFF
B
6/16/2008 1:43:46 PM
6/16/2008 1:43:46 PM
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