17
Troubleshooting
4. The built-in buzzer sounds and/or the external siren, dialer,
or alarm system is activated.
5. To conserve the backup DC source’s power, set the mode
switch to
TEST/OFF
as soon as you confirm proper opera-
tion.
6. Reconnect the AC adapter.
POWER FAILURE ALARM
When both AC power and the backup DC source are off, the
alert triggers an external device (such as a phone dialer or an
alarm system).
ˆ
Troubleshooting
We do not expect you to have problems with your Invisible
Beam Entry Alert, but if you do, refer to this table to find possi-
ble causes and remedies. If your alert is still not operating prop-
erly, take it to your local RadioShack store for assistance.
Problem Possible Cause Solution
The external siren
(or another con-
nected device) does
not operate.
The in-line fuse is blown.
Replace the fuse with one of
the same size and type (see
“Replacing the Fuse” on
Page 18).
The alarm sounds
when the infrared
beam is not broken,
giving off false
alarms.
The sensor is set out of
range, causing it to oper-
ate erratically.
Position the alert and the
reflector within 3 to 50 feet of
each other. Adjust
SENSI-
TIVITY
so the false alarm
stops.
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