Raytheon 138-119, Operator'S And Service Manual

Page: 38 / 55

Change Over Box
138--119
32
3769DOC000002 Edition: April 06, 2005
4.4.3 Status messages/Error messages
The Distribution Unit provides other status messages:
•
System Failure (is used to switch--over all relays of the Change Over Box)
•
Sensor Alarm Gyro1 Failure
•
Sensor Alarm Gyro2 Failure
•
Sensor Alarm Gyro3 / GPS Failure
•
Sensor Alarm TMC Failure
•
Course Monitor Alarm
•
Sensor Diff. Alarm
•
TMC Selected
•
Gyro Selected
•
GPS Gyro Selected
•
CAN BUS Failure
•
Alarm reset
All above mentioned status messages and/or alarms can
be output out of each Distribution Unit and can be indi-
cated at external alarm devices/systems.
Only the “System Failure” of Distribution 1 switches the
relays of the Change Over Box.
If a “System Failure” occurs in the Distribution Unit 1, all
other status messages and/or alarms of the Distribution
Unit 1 are without interest.
If a “System Failure” occurs in the Distribution Unit 2, all
other status messages and/or alarms of the Distribution
Unit 2 are without interest.
The DV bus, which is also output from a Dis-
tribution Unit is not switched--over.
For further information on the status messages of the Distribution Unit see manual of the
Distribution Unit.