Specifications

DS7400Xi Ver. 3+ Reference Guide Copyright © 1995-96 Detection Systems, Inc. Page 82
General System Problems (Continued)
Symptom Probable Cause Possible Solution
#87 display = Ground Fault
#89 display = System Fault 04
#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
Unable to arm the system.
There is a short to ground somewhere in
the system.
The message queue in the RF modem is
full and no messages can get out to the ra-
dio 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 AR-
DIS 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.
The communication between the panel and
the ARDIS Module is getting corrupted.
a) Zone(s) faulted.
b) If an AC failure exists, you must force
arm.
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 an-
other system fault present.
If there is no keypad nearby, or another control prob-
lem 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 con-
siderably higher or lower indicates a ground fault.
Disconnect field wiring from each terminal while
watching the meter. When the voltage reading re-
turns to between -4.5 and -7.5 VDC, you have found
the wire that is causing the ground fault.
Check RF coverage of the unit and check for RF noisy
environment.
Contract the central station and notify of status.
Contact the network administrators or technical ser-
vice.
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
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 By-
pass key during a 5 second beep.