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TROUBLESHOOTING
Problem
Probable Cause
Solution
No
signals
received
AC power not available and
battery dead.
Wall power pack defective.
Verify that wall outlet is live and
voltage is between 102 and 138
VAC.
Verify approximately 12 volts AC
across terminal block positions 1
and 2.
Replace power pack.
Antenna
Location
See page 21-23 for selecting
Antenna locations.
Programming (Subscriber #,
Central Station ID #, or O/E)
Verify and correct programming
entry.
Radio Fault
If you have a 7720P, see page 26
If you don’t have a 7720P, see
page 4 (LED FLASHING).
Low Battery and AC not
connected.
Apply AC voltage to radio for
approximately 2 hours to charge
battery. If this fails, replace
battery.
Environment
If temperature exceeds -30°C to
60°C,radio may not perform
correctly. Mount radio in
temperate area.
Relocate the 7720PLUS by using
the Remote Antenna Kit.
Central Station is not receiving
Alarms.
No connection to ground
Connect common ground from
trigger output of panel to TB 1 Pin
4.
Incorrect trigger input.
Verify type of input.
Application of +4.5 to 12 volts
(Non-Inverted).
Absence of +4.5 to 12 volts
(Inverted).
Incorrect Jumper settings.
See Setting the Jumper Options:
J2 Zone Sense Input
