4 UPS Startup and Shutdown
Powerware
®
Plus 12 Operator's Manual (164200090 Rev E) 23
. Turnon(I)theoutput breaker. The Bypass indicator remains lit.
The UPS supplies incoming AC power to the load. The Bypass indicator flashes in
the event of a phase rotation error. See page 43 for the appropriate input wiring.
If the Bypass indicator does not illuminate or flash, the UPS is in Load
PowerĆOff mode. Press the UPS On button to supply power to the load. The
Bypass indicator should illuminate.
When performing system startup after an EPO has occurred, the UPS may
automatically switch to Normal mode when the output breaker is closed.
. Press the UPS On button. The alarm beeps and the Battery and Bypass
indicators flash as the rectifier turns on.
After approximately 15 seconds, the Bypass and Normal indicators flash as the
inverter turns on. When the UPS is on, the Normal indicator remains lit indicating
that the UPS is operating in Normal mode.
If the Bypass and Battery, or Bypass and Normal indicators flash for more
than one minute, or if the indicators flash in any combination other than
those mentioned in this section, call your field service representative.
System Shutdown
Shut down your system according to one of the following procedures, depending on
whether the Bypass feature is disabled or enabled.
With Bypass Disabled
The Bypass Configuration switch is in the DISABLE position.
. Press and hold the UPS Off button. The alarm sounds for three seconds and
the Normal indicator goes off.
. Turn off (O) the input breaker, battery breaker, and output breaker to ensure
that all power is removed from the protected equipment.
With Bypass Enabled
The Bypass Configuration switch is in the ENABLE position.
. Press and hold the UPS Off button until the unit transfers to Bypass. The
Bypass indicator illuminates and the alarm sounds.
. Turn off (O) the input breaker, battery breaker, and output breaker to ensure
that all power is removed from the protected equipment. The Bypass indicator
turns off.
If the utility input voltage is removed from the UPS or the input breaker is
left open for an extended period, the batteries will be discharged. The batteries
must be disconnected from the UPS, opening the battery breaker will remove
all load from the batteries.
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