Garmin G300 for Cessna SkyCatcher Pilot's Manual page 237

SYSTEM STATUS MESSAGES (CONT.)
Message
Check XM antenna
Config module error
Config module missing
Demo Mode - Do not use for
navigation
GDU software version
mismatch
GPS antenna not connected
GPS antenna shorted to
ground
GSU 73 configuration error
GSU 73 needs service
GSU 73 not responding
GSU 73 software update
available
GSU 73 temperature too low The GSU temperature is too low. If the problem
GSU 73 temperature too
high
190-00921-00 Rev. E
Annunciations & Alerts
Comments
The display that is configured for a XM antenna
connection does not have an XM signal.
The GDU has encountered unexpected
configuration settings. The G300 system should
be serviced.
The PFD config module is not connected.
The system is in demo mode, do not use for
navigation.
The PFD and MFD do not have the same
software version installed. Display crosstalk is
disabled. Ensure all installed display software
matches.
The display that is configured for a GPS antenna
connection does not detect any antenna current
draw from the GPS antenna RF connector.
The display that is configured for a GPS antenna
connection detects the GPS antenna RF
connector is shorted to ground.
The GSU configuration settings do not match
the configuration settings stored in backup
memory. The G300 system should be serviced.
The GSU should be serviced when possible.
The GDU has lost communication with the GSU.
A software update for the GSU 73 is available.
Consult the install manual for instructions on
performing a GSU 73 software update..
persists, the G300 system should be serviced.
The GSU temperature is too high. If the
problem persists, the G300 system should be
serviced.
Garmin G300 Pilot's Guide
219