(b)
 Signal transmission The lavatory smoke detectors are connected via a CAN bus to a DEU type B and linked via the CIDS middle line bus to the CIDS directors. They communicate internally with the respective CIDS-SDF channels. The director sends a signal to the FAP where the SMOKE DETECTION page comes up automatically. On the SMOKE DETECTION page the location of the smoke alert is displayed.

R **ON A/C 106-149, 401-499,
 (c)
 Indication A smoke alert from the lavatory makes the respective ACP light segment come on in the steady mode. The related message is shown on the assigned AIP. Also, the respective lavatory call-light comes on in the flashing mode.

 (d)
 Chimes In case of a smoke alert the director transmits a signal to the DEU type A. The DEU type A activates directly or via PISA a chime sequence emitted through the loudspeaker.

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 Lavatory Smoke Detection - Block Diagram
 Figure 045A

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 FAP - Smoke Detection Page (only Smoke Detection related buttons labeled) -
Example
 Figure 046 
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 FAP - Smoke Detection Page (only Smoke Detection related buttons labeled) -
Example
 Figure 046A 
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 **ON A/C 301-399,
 (e) Indication A smoke alert from the lavatory makes the respective ACP light segment come on in the flashing mode. The related message is shown on the assigned AIP. Also, the respective lavatory call-light comes on in the flashing mode.
 (f) Chimes In case of a smoke alert the director transmits a signal to the DEU type A. The DEU type A activates directly or via PISA a chime sequence emitted through the loudspeaker. 
R  **ON A/C 106-149, 401-499,
 (g) Reset If there is no more smoke detected, the CIDS-SDF resets all visual and acoustical indications automatically. To reset the visual and acoustic indication in the cabin manually you have to push the 'SMOKE RESET' button either on the SMOKE DETECTION page on the FAP touchscreen, the FAP subpanel or on the AAP. This affects only the cabin indications. The indications on the FAP stay as long as the smoke is detected.
 **ON A/C 301-399,
R R R  (g) Reset If there is no more smoke detected, the CIDS-SDF resets all visual and acoustical indications automatically. To reset the visual and acoustic indications in the cabin manually you have to push the 'SMOKE RESET' button either on the SMOKE DETECTION page on the FAP touchscreen, the FAP subpanel or on the AAP. This affects only the cabin indications. The indications on the FAP stay as long as the smoke is detected. The EVAC/SMOKE RESET button (2064VU) in the mid and exit attendant area also resets the visual and acoustic indications in the cabin. 

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 (12)
 Cargo smoke detection (Ref. Fig. 047)

 (a)
 General The cargo smoke detection is part of the CIDS Smoke Detection Function (CIDS-SDF). The CIDS-SDF detects smoke alerts in certain cargo compartments. (Ref. 26-16-00)

 (b)
 Signal transmission The cargo smoke detectors are connected via a CAN bus to the CIDS-SDF channels of both CIDS directors. The CIDS-SDF channel transmits the smoke alert via a discrete signal directly to the cockpit indicator and via an ARINC 429 bus to the FWCs.

 (c)
 Indication A fault or an off-condition of the detector are indicated on the CFDS.

 (13)
 Cargo fire extinguisher monitoring

 (a)
 General The cargo fire extinguisher monitoring is part of the CIDS Smoke Detection Function (CIDS-SDF). The CIDS-SDF controls and monitors the fire-extinguisher bottle-pressure reservoir and squib condition in certain cargo compartments. (Ref. 26-23-00)

 (b)
 Signal transmission The fire extinguisher bottle pressure sensor and the discharge cartridge conditions are transmitted via the Cargo Smoke panel with discrete outputs to CIDS-SDF. The CIDS-SDF has an ARINC 429 bus interface to the FWC and to the CFDS.

 (c)
 Indication A low pressure of the fire extinguishing bottles and a fault condition of the discharge cartridges (SQUIB) are indicated on the CFDS.

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