source of power that is limited in duration. Restore power to the UPS by plugging in the line cord. Repeat
this test four or five times to ensure proper operation.
Another way to test the operation of the UPS is to simply press and hold the On/Off/Test button for two
seconds or more, and then release it to run a self-test routine. The UPS will immediately transfer your
equipment to power derived from its internal battery and run a self-test. See the next section if abnormal
operation is encountered.
Overloads and Output Shorts
If the total power requirement of your equipment is much greater than the capacity of the UPS, the UPS
rear-panel circuit breaker may trip. (120 V model 168175 and the 220 V versions have a fuse instead of
a circuit breaker.) Once the breaker is tripped, the UPS will attempt to operate the load using its internal
power source. The UPS will emit a loud tone before it shuts down and ceases to power your equipment.
The yellow LED will be illuminated and stay on to alert you of the overload until the UPS is started up again.
In this case, turn off the UPS and decide which equipment is to be left unprotected by the UPS. Once the
overload or short circuitry is released, reset the input circuit breaker on the rear panel by pressing the button
in. Then re-start the UPS. Do
not
plug laser printers into this device, as their power requirements are much
greater than the capacity of the UPS.
Connection for Telephone/Network Surge Suppression
Connect a single-line telephone or 10 Base-T network cable into the telephone/network surge protection
sockets on the rear panel of the UPS. The RJ-11/RJ-45 modular combination sockets accept all standard
single-line telephone and 10 Base-T connections. The cable coming from the telephone service or networked
system is connected to the port marked IN; the OUT port is connected to the equipment to be protected.
