System Failure" In Switch Positions "Sys1" And "Sys2 - Raytheon 138-119 Operator's And Service Manual

Error recognition:
The activation of the error "System Failure" of the DU 1 can be gripped off and can be used
to control external devices. This error message is at the terminal board of the Change Over
Switch.
If the failure has been repaired and the compass system has been set into operation again,
the complete system operates automatically in the normal mode:
-- The "System Failure" --relay is dropped off.
-- There is no switching potential at the relays of the Change Over Box.
-- All relays of the Change Over Box are dropped off.
-- The outputs of the Distribution Unit are output from the Change Over Box.
4.4.2

"System Failure" in switch positions "Sys1" and "Sys2"

If the Change Over Switch is in position "Sys1" or "Sys2", there is no automatically switch--
over function!
-- In position "Sys1" only signal outputs of the compass system 1 are switched to the
outputs of the Change Over Box.
-- In position "Sys2" only signal outputs of the compass system 2 are switched to the
outputs of the Change Over Box.
3769DOC000002
Change Over Box
138- -119
ATTENTION!
In case of a failure in Distribution Unit 1 ("System
Failure") and with the Change over Switch in
Position "Sys1" or "Sys2" there is no automatic
switch--over to the other Distribution Unit.
31
COMPASS
STD22
Edition: April 06, 2005