Garmin G300 Pilot's Manual page 226

annunciations & alerts
SyStem StatuS meSSageS (COnt.)
Message
Magnetic anomaly - Check
mag installation
Check XM antenna
Check XM antenna
Magnetometer failure
Navigation database
mismatch
Network fault - Duplicate
GDU detected
Not receiving autopilot RS-
232 data
Obstacle database mismatch The PFD and MFD have different obstacle
Obstacle database missing
Terrain database mismatch
Terrain database missing
XM receiver needs service
208
Comments
An anomaly has been detected in the
magnetometer data. Heading may or may not
be flagged invalid.
The display that is configured for a XM antenna
connection does not have an XM signal.
The display that is configured for a XM antenna
connection does not have an XM signal.
Communication has been lost or a fault has
been detected in the GMU. Heading is flagged
invalid and the AHRS will use GPS for backup
mode operation. The G300 system should be
serviced.
The PFD and MFD have different navigation
database versions installed. Install the correct
navigation database on all displays.
A duplicate GDU has been detected on the CAN
bus. If the problem persists, the G300 system
should be serviced.
Not receiving RS-232 data from integrated
autopilot unit.
database versions installed. Install the correct
obstacle database on all displays.
The obstacle database is missing. Install the
correct obstacle database on all displays.
The PFD and MFD have different terrain
database versions installed. Install the correct
terrain database on all displays.
The terrain database is missing. Install the
correct terrain database on all displays.
The display should be serviced when possible.
Garmin G300 Pilot's Guide 190-00921-00 Rev. D