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cord. Observe that your equipment operates normally during both transfer from
utility power to UPS power and back again. Repeat this test four or five times to
ensure proper operation. See the following section covering Overloads if
abnormal operation is encountered.
The power I/0 control switches power to your equipment. If you leave your
equipment power switches on, the I/0 power control can be used as a master on/
off switch!
3.8 Overloads
If the total power requirement of your equipment is much greater than the
capacity of the UPS, the UPS’s rear panel circuit breaker may trip. This is called
an overload situation. Once the circuit breaker trips, the UPS will attempt to
operate the load using its internal power source. This may result in an unexpect-
edly short run time or, if the overload is severe, the UPS will immediately shut
down and cease to power the load. In this case, the UPS will emit a loud tone to
alert you of the overload. If this occurs during your test, turn off the UPS and
decide which equipment will be left unprotected by the UPS. The circuit breaker
may be reset (press button) when the overload is removed.
3.0 Installation
3.7 Test for proper operation - continued