1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-73-00Page 55 1201-299, 1Config-1 Aug 01/05R 1 1 1CES 1
-more than 50% of all DEU A or 20% of adjacent DEU A zonewise fail,
-no data from SDCU channel 1 and 2,
-
the drainmast system fails,
-
the emergency slide bottle pressure is low,
-
the slide bottle pressure is low,
-
the door bottle pressure is low,
-
the lavatory smoke detection fails,
- one DEU A fails,
- one DEU B fails,
-
the CIDS top bus fails,
-
the CIDS mid bus fails,
-
the FAP fails,
-
the PTP fails,
-
the CAM fails,
-
no data from FAP,
-
no data from CAM,
-
no data from PTP.
The CIDS CAUTION light is resettable 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 CAUTION occurs, the
respective failure message is displayed on the programming and
test panel. The director will perform, or cause a CIDS
component test to be done, when commanded from the programming
and test panel. This is described under 'System Testing and
Programming'.
The function of the director with respect to these systems is
described in the 'System Operation' section:
-
the PA system,
-
the interphone system,
-
the lighted signs,
-
the PAX call.
For other systems, refer to the appropriate system chapters.
There remains, however, other aspects to the director's
operation, and these are described in the text shown below.
(Ref. Fig. 010).
(c) Emergency Mode Activation For reduction of power consumption, the director has the capability to activate an emergency mode. The emergency mode causes all sections of the director which are not permanently in use to switch off. The sections of the director and the cabin systems control circuits which are not switched off are:
-
the power supply,
-
the microcomputer,
-
the CIDS data bus driver,
-
the PA system,
1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-73-00Page 56 1201-299, 1Config-1 Aug 01/05R 1 1 1CES 1
-
the interphone,
-
the EVAC. The power supply for top lines is also disconnected. This is done when no power is detected at the 'normal power sensing' input and no PA announcement is made. The director then applies a 28 V DC output to the 'Top Line Cut-off Relay 106RH' output.
**ON A/C 001-049, 051-099, 101-105, 201-299,
(d) Power Sensing As long as power is available at power input one, it supplies the director. In the event of a power failure at this input, the director automatically switches over to supply input two. If power is detected at the 'Normal Power Sensing' input (and the director is operative), then the output 'Power Transfer Relay' is switched to active ground. The connected relay 105RH is held in the energized state. Failure in the output deenergizes the relay. This connects essential power and transfers control of the top-line cut-off relay 106RH to the other director.
**ON A/C 151-199,
(d) Power Sensing As long as power is available at power input one (NORM), it supplies the director. In the event of a power failure at this input, the director automatically switches over to supply input two (ESS).
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