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Problem
No
signals received
Probable
Cause
7720V2 in Charging Mode
Low Battery
Central Station
is not receiving
Alarms.
Incorrect power-up procedure
Antenna Location
Programming (Subscriber #, Centra,
Station ID #, or O/E)
Radio Fault
Low Battery
Charging Source
Auxiliary Voltage
Environment
No ground connection
Incorrect trigger input.
Incorrect Jumper settings.
Solution
Replace or Charge Battery
Plug-in the battery first.
See
page
15-16
for selecting
Antenna locations.
Verify and correct
programming
entry.
If you have a 7720P, see page 20
If You don't have a 7720P, see ~age
4 {LED FLASHING).
" -
Confirm charging voltage at Pins
1&2.
Replace battery.
The 7720V2
needs a
constant
charging
source
of 100mA and
275mA at peak with a minimum of
9.5VDC
charging
voltage.
Problems will be displayed on the
7720P. If current charging source is
not
adequate
to
supply
the
7720V2,
use
the
ADEMCO
7720V2TR Power Pack.
If not providing 9.5 volts-14.2 volts,
use ADEMCO
7720v2TR
Power
Pack.
If temperature
exceeds -30°C to
60"C,
this will diminish
battery
capacity and or life. Replace battery
if required.
Relocate the 7720V2 by using the
Remote Antenna Kit.
Connect
common
around
from
trigger output (TB Pin ~).
Verify type of input.
Application of +4.5 to 12 volts (Non-
Inverted).
Absence
of +4.5
to
12 volts
(Inverted).
See Settinq the Jum~er Odions:
J2
Zone
ln@t
"
'
J3 ECP ODeration
J4 Trigger' Voltage
-20-
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