CIDS WARNINGS Airbus A320

GENERAL
All BITE results are stored in the director (DIR) BITE dedicated memory
with failure indication shown on the Cabin Intercommunication Data
System (CIDS)
CAUTion light, the ECAM EWD, the STATUS page on
the ECAM SD, the MCDU and the Programming and Test Panel (PTP).
Some failures or combination of failures cause immediate indication on
ECAM and single chime activation. A failure in the initialization process
in DIR 1 causes:
– display of the STatuS reminder on the EWD,
– display of CIDS 1 message on the STATUS page (on request).
NOTE: The STATUS page does not appear automatically after a
warning.

CIDS 1 + 2 FAULT
If a failure of:
– both directors,
– 50% of all type A Decoder/Encoder Units (DEUs),
– 20% of adjacent type A DEUs zone wise,
– all type B DEUs with connected handset,
happens, the single chime sounds, the ECAM MASTER CAUT comes
on in the cockpit and the CIDS CAUT light comes on, on the Forward
Attendant Panel (FAP). The failure message is shown on the ECAM
EWD, and on request, on the STATUS page. A “CIDS FAIL” (check
CIDS functions) message is displayed for cabin crew on the PTP for all
cases. The related message is sent to the Centralized Fault display System
(CFDS)/PTP:
– DIR (via DIR 1 + 2),
– 50% type A DEUs,
– 20% type A DEUs in (x) zone,
– all type B DEUs with handset.

CIDS CAUTION ON ECAM
When a CIDS caution message is displayed on the ECAM, the detailed
failure message is memorized in the PTP and available on ground on
request. The caution messages on the ECAM are the STS reminder on
the EWD, and the class 2 maintenance message on the STATUS page
which is displayed on request. The DIR continues to send CIDS caution
message to the System Data Acquisition Concentrator (SDAC) until the
fault is corrected. The CIDS caution message on the ECAM is displayed
if one DIR fails.

CIDS CAUTION LIGHT ON FAP
Some CIDS caution message or failure signals also activate the CIDS
CAUT light on the FAP.
NOTE: The CIDS CAUT light can be reset in flight, but comes on again
on the ground (landing gear down and locked). The light cannot
be reset on the ground. When a CIDS CAUT occurs, the
respective failure message is displayed on the PTP.
The CIDS CAUT light comes on if :
– both DIRs fail,
– 50% of all type A DEUs fail,
– 20% of adjacent type A DEUs fail zonewise,
– all type B DEUs with a connected handset fail,
– no data from Smoke Detection Control Unit (SDCU) channel 1 and 2,
– the lavatory smoke detector fails (option),
– lavatory fire extinguisher bottle pressure low (by SDCU) (option),
– the heater of the drain mast fails,
– the control unit of the drain mast fails,
– the slides bottle pressure is low,
– the doors bottle pressure is low,
– CIDS top bus,
– CIDS mid bus,
– DEU-A,
– DEU-B,
– FAP, PTP, Cabin Assignment Module (CAM),
– no data from CAM,
– no data from FAP,
– no data from PTP.

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