DS7400Xi-AT (Ver. 3+) Reference Guide Copyright © 1995-2000 Detection Systems, Inc. Page 87
General System Problems (Continued)
Symptom
Probable Cause
Possible Solution
#87 display = Aux Power Fault
#87 display = Keypad Fault
The auxiliary power output has been
shorted.
a) The keypad wiring is defective.
b) A keypad is missing.
c) A keypad has been programmed, but is
not intended in this system.
Remove wiring from auxiliary power and check for
shorts.
a) Check keypad operation and wiring.
b) Install a keypad.
c) Remove from programming (0173-0180).
#87 display = Ground Fault
#89 display = System Fault 04
There is a short to ground somewhere in
the system.
Disconnect field wiring from each terminal while
watching the keypad display. When the keypad
power LED stops flashing, you have found the wire
that is causing the ground fault.
Note:
The LED will not stop flashing if there is
another system fault present.
If there is no keypad nearby, or another control
problem exists, you can use a volt-meter to find the
ground fault:
1) Connect the negative lead of a volt-meter to the
panel ground terminal.
2) Connect the positive terminal to the Aux Power –
terminal.
You should read -4.5 to -7.5 Volts DC. A reading
considerably higher or lower indicates a ground
fault.
Disconnect field wiring from each terminal while
watching the meter. When the voltage reading returns
to between -4.5 and -7.5 VDC, you have found the
#87 display = AR IB Queue Full
#89 display = System Fault 51
#87 display = AR Host Down
#89 display = System Fault 52
#87 display = AR Unreg. Modem
#89 display = System Fault 53
#87 display = AR Power Fail
#89 display = System Fault 54
#87 display = AR Network Lost
#89 display = System Fault 55
#87 display = AR Modem HW Err
#89 display = System Fault 56
#87 display = AR Modem SW Err
#89 display = System Fault 57
#87 display = AR Opt. Bus Err
#89 display = System Fault 58
#87 display = AR Corrupt MSG
#89 display = System Fault 59
The message queue in the RF modem is
full and no messages can get out to the
radio network.
The central station receiver has ceased to
be available to the network.
The modem is not registered through all
parts of the network.
There is a possible problem with the ARDIS
Module unit.
The ARDIS Module has lost contact with
the radio network.
There is a possible problem with the radio
modem.
The ARDIS Module is having some trouble
communicating with the radio modem.
The panel can no longer communicate
with the ARDIS Module.
Communication between the panel and the
ARDIS Module is getting corrupted.
wire that is causing the ground fault.
Check RF coverage of the unit and check for RF
noisy environment.
Contact the central station and notify of status.
Contact the network administrators or technical
service.
Return for service.
Check the location and coverage of the unit.
Replace the unit.
Check for noisy environment and replace the unit if
the problem continues.
Check the wiring between the DS7400Xi and the
ARDIS Module.
Check for noisy environment, and check the wiring
Unable to arm the system.
a) Zone(s) faulted.
b) If an AC failure exists, you must force
arm.
between the DS7400Xi and the ARDIS Module.
a) Determine the cause of the problem and clear
the indicated zone(s).
b) Enter an arming sequence, then press the
Bypass key during a 5 second beep.
Summary of Contents for DS7400Xi-AT
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