SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
C--15
PRIMUS
R
870 Weather Radar
If a failure is detected during TEST mode, a corresponding fault code
is generated. Fault codes are displayed as part of the FAIL annunciator
i.e., F AIL “N”, where “N” is the fault code. (Refer to Table C--3.)
NOTES: 1. Some weather failures are annunciated on the
EFIS/MFD with WX.
2. Some EFIS/MFD installations power up with WX
displayed if the weather radar is turned off.
EFIS Fault Code
Fault Description
00 No fault detected.
01 The antenna is not scanning or it is not
scanning correctly.
02 Antenna stabilization errors.
03 Radar receiver fault.
04 The radar signal mixer current is out of
specification -- probably due to defective
mixer diodes.
05 Radar automatic frequency control fault.
Can be caused by defective transmitter .
This fault can be observed in TEST by the
display of a broken noise band.
06 Indicates abnormal fan current for an
extended period of time.
07 Central processing unit microprocessor
fault in RTA.
EFIS Fault Code Descriptions
Table C- -3
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