Garmin Cirrus Perspective SR20 Pilot's Manual page 606

APPENDIX A
System Annunciation
592 Cirrus Perspective
Comment
Attitude and Heading
Reference System is aligning.
Display system is not receiving
attitude information from the
AHRS.
AHRS calibration incomplete or
configuration module failure.
This annunciation is seen only
when the autopilot is engaged.
The annunciation indicates an
AHRS monitor has detected
an abnormal flight parameter,
possibly caused by strong
turbulence. In this case, the
situation should correct itself
within a few seconds. If there
is an actual failure, a red "X"
soon appears over the Attitude
Indicator.
GPS information is either
not present or is invalid for
navigation use. Note that
AHRS utilizes GPS inputs
during normal operation.
AHRS operation may be
degraded if GPS signals are not
present (see POH).
Display system is not receiving
airspeed input from air data
computer.
by Garmin – Pilot's Guide for the SR20/SR22/SR22T
™
System Annunciation
Display system is not receiving
vertical speed input from the
air data computer.
Display system is not receiving
valid heading input from AHRS.
Display system is not receiving
altitude input from the air data
computer.
Display system is not receiving
valid true airspeed information
from air data computer.
Display system is not receiving
valid OAT information from air
data computer.
Display system is not receiving
valid transponder information.
Different versions of GDU
software are installed in the
PFD and MFD. This can also
indicate different versions of the
navigation database installed in
the PFD and MFD. A cross-talk
error between the PFD and MFD
will also cause this annunciation.
A red 'X' through any other
display field (such as engine
Other Various Red X
instrumentation fields)
Indications
indicates that the field is not
receiving valid data.
Comment
190-00820-08 Rev. A