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5.0 Controls and indicators
5.1 Power I/0 switch
The power I/0 switch controls power to the PowerCell and its
output receptacles. When the switch is on, the PowerCell oper-
ates and your computer equipment will be powered. When the
switch is off, the PowerCell is de-energized and your equipment
is unpowered. If your equipment switches are left on, the entire
system can be operated by using just the power I/0 switch! The
lamp within the power I/0 switch illuminates whenever normal
voltages are present at the output receptacles. When the switch is in the on
position and the lamp is extinguished, the UPS has shut down due to overload
or low battery.
5.2 Audible alarm
During a utility failure, your PowerCell emits a beep once every five seconds to
warn you that your equipment is operating from a source of power which is
limited in duration. In the event of an extended utility failure, the PowerCell will
sound a loud tone 2 minutes in advance of shut down due to battery capacity
exhaustion. Once shut down, the UPS will return to the periodic beep. The
PowerCell should be turned off at this point to cease the alarm. If your PowerCell
is overloaded, it will shut down and emit a loud tone. The alarm is reset when
the UPS is turned off.
5.3 Site wiring fault indicator
The site wiring fault indicator warns you of wiring conditions which could be
hazardous and impair the UPS’s ability to provide the highest degree of surge
and noise suppression. The indicator will illuminate when the UPS is turned on
and connected to an outlet in which the “hot” and “neutral” wires are reversed,
the ground wiring is missing, or whose “neutral” wiring is overloaded. Nor-
mally, the indicator need only be checked at installation.
Note: A qualified electrician should be summoned to correct the service wiring if the UPS
detects a fault.