Napco Security Technologies XP-400 User Manual

Page 25

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25

Troubleshooting

1. The bell output drops to about 3 volts

in alarm.
The battery/bell circuit is protected by a
PC board trace which may have burned
open by reversal of the battery leads. It is
on the back of the PC board just adjacent
to the red & black battery leads. Send in
for service if this occurs.


2. How do I remove the Keypad Sounder

on Alarm?
The keypad sounder follows the Burg
Output. If you need to remove the Keypad
Sounder, then you must remove the Burg
Output from that zone.

3. How do I activate Chime by Zone?

The Chime feature will automatically be
assigned to all zones, except for the
following:

3. Zones programmed as Home/Away

with Delay.

Zones programmed as Exit/Entry
Followers

4. Zones programmed for 24 Hour

Protection. To Activate/Deactivate
the chime mode, Press

A5

.

4. When using a piezo on the Bell Output,

it constantly buzzes.
This is due to the fact that there is a
constant loop current flowing through the
Bell circuit for supervision. To eliminate
this, cut resistor R26 which is located
directly above Terminal 9 just below the
heat sink.


5. Where are the fuses?

The control panel incorporates advanced
circuitry which automatically limits the
current when an over current condition
exists without the use of traditional fuses.
The circuit will restore automatically when
the over current condition is corrected.

6. The PGM Output Pulses in Alarm.

When the PGM lug of the control panel is
programmed for an Armed indication it
also incorporates an Alarm Memory
function which will indicate that the system
is in an Alarm condition. If this output is
being used to trigger a long range radio, it
can be converted to a steady output with
the use of a capacitor, negative to PGM
Terminal 15
, Pos to Aux. Pwr. Term 12.
(220 mF Electrolytic Capacitor, 25 Volts.
Increase to 470 mF if necessary)


7. I short out the bell and the system does

not indicate Bell Trouble.
The Bell Supervision circuit is only
designed to detect a "Bell Cut", it does not
supervise for a short on the Bell.

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