5.0Controls and indicators

5.1Power 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: Aqualified electrician should be summoned to correct the service wiring if the UPS detects a fault.

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American Power Conversion POWERCELL user manual Controls and indicators, Power I/0 switch, Audible alarm