Honeywell IntuVue RDR-4000 Pilot's Manual page 41

IntuVue RDR-4000 Weather Radar Pilot's Guide
If a fault occurs, follow standard operating/maintenance procedures.
Note that in a dual installation most faults will affect only one side; the
other system will normally be operational.
The following table shows some typical fault annunciations. Actual fault
annunciations depend on the display in use. In some installations,
faults may also be annunciated on displays other than the radar display.
Display Annunciation
RT
ANT
CONT
WEAK
PROC
ATT
See the aircraft installation documentation for complete descriptions of
the possible failure modes.
060-4492-000
Rev 7, February 2015
Example of Fault Annunciations
Failure
Transmitter/Receiver (TR-1) Unit Failure
Antenna Drive Failure
Control Panel Fault
TR Unit Fault - Below Normal Power
Radar Processor (RP-1) Fault
Attitude Fault
Principles of Weather Radar Use
37