Apc BK600EI User Manual download pdf (Page 20)

Page 18

5.0 Controls and indicators

5.1 Power I/0 switch

The power I/0 switch controls power to the UPS and its output

receptacles. When the switch is on, the UPS operates and your

computer equipment will be powered. When the switch is off, the

UPS 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 Test/Alarm Disable switch (on units so equipped)

When operating during a utility power outage, the UPS will emit a beep once every five

seconds. This beep can be silenced by pressing the Alarm Disable control (bottom of

toggle switch.) However, the UPS's low battery warning will still

sound in the event of an extended utility outage.

When the Test portion of the Test/Alarm Disable switch is pressed,

(top of toggle switch) the UPS simulates a power outage and

transfers your load to the alternate power source. This feature

allows you to determine that computer equipment protected by

the UPS operates normally during transfers. It also provides a

convenient means of testing the UPS’s battery. If the Test control is held depressed, the

UPS will operate your equipment from power derived from the battery continuously. If

during the test the low battery warning is sounded prematurely and the load is known to

be normal, then the battery is weak and requires extended recharge or replacement (see

section 7.0).

5.3 Audible alarm

During a utility failure, the UPS 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. The alarm

can be defeated using the Alarm Disable switch (on units so equipped) or, in advance of

the outage, via option switch #1. In the event of an extended utility failure, the UPS will

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Apc BK600EI User Manual Page 20