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9 – Start-Up, Shutdown and Bypass (continued)
9-5 Manual Bypass Procedure (Single UPS)
Warning: Placing the UPS system in manual bypass will disable the inverter and power all loads from the manual bypass (reserve) source,
but the UPS system will still be energized. Before performing maintenance or repair on the UPS system, shut down and de-energize the
UPS system completely by following the steps in
Section 9-6. Although connected equipment loads will be powered by the bypass (reserve)
power source, they will not receive battery backup in the event of a utility power failure.
When the UPS system is in online (normal) mode, press the OFF •
button
A
for 3 seconds (until you hear a beep), then release the
button. The inverter will automatically switch to bypass mode and
the “BYPASS” LED will illuminate.
Switch on the manual bypass circuit breaker switch •
A
, then switch
off the output circuit breaker switch
B
.
9-6 Shutdown Procedure (Single UPS)
Warning: The UPS system shutdown procedure will eliminate the AC power output for all loads. Before shutdown, confirm that all loads
are turned off or place the UPS system in manual bypass mode to keep loads powered by the reserve (bypass) power source.
Press the OFF button •
A
for 3 seconds (until you hear a beep), then
release the button. If the UPS system is in online (normal) mode, it
will switch to bypass mode. If the UPS system is in battery backup
mode, the inverter will shut down and AC output power will be
interrupted.
Switch off the main input circuit breaker switch •
A
.
Switch off the bypass input circuit breaker switch •
A
.
1
1
2
2
3
1
1
2
2
3
A
A
Output Manual
Bypass
Bypass
Input
Main
Input
AB
Output
Output
Manual
Bypass
Manual
Bypass
Bypass
Input
Bypass
Input
Main
Input
Main
Input
A
A
200706017 93-2688 SU manual 4C.indd 27200706017 93-2688 SU manual 4C.indd 27 11/29/2007 2:02:46 PM11/29/2007 2:02:46 PM