Table 5-10. Weather Radar Alert Troubleshooting Guide - Garmin GTN 6 series Maintenance Manual

Alert Text
DATALINK - GDL 88 CSA
Failure
DATALINK – GDL 88 external
traffic system inoperative or
connection lost.
DATALINK - GDL 88 external
traffic system has a low
battery.
DATALINK – GDL 88
configuration module needs
service.
DATALINK – GDL 88 needs
service.
5.3.1.8 Weather Radar Alerts

Table 5-10. Weather Radar Alert Troubleshooting Guide

Alert Text
WX RADAR FAIL – Weather
radar is inoperative.
WX RADAR SERVICE –
Weather radar needs service.
Return unit for repair.
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Page 5-16
Possible Cause
The GDL 88 is reporting to the
GTN that the CSA application
has failed. Traffic alerting on
ADS-B traffic is unavailable.
The GDL 88 has detected a
TAS/TCAS input fault.
The GDL 88 is reporting that
the external traffic system has
a low battery.
The GDL 88 has detected a
configuration module fault.
GDL 88 has detected an
internal fault.
Possible Cause
GTN ARINC 708 input port or
ARINC 429 output not
configured correctly.
Improper setup on the weather
radar.
Wiring connections are
incorrect.
Weather radar is reporting a
system fault.
Weather radar is reporting a
system failure.
Corrective Action
Ensure the aircraft has a clear
view of the sky.
If the problem persists, contact
Garmin technical support.
Refer to the GDL 88 STC
Installation Manual.
Refer to the GDL 88 STC
Installation Manual.
Refer to the GDL 88 STC
Installation Manual.
Check the GDL 88 Fault page
in configuration mode on the
GTN.
Refer to the GDL 88 STC
Installation Manual.
Corrective Action
Check ARINC 708 port setting
for port 1. Raw ARINC 708
data can be viewed on the
GTN DIAGNOSTICS - ARINC
INPUTS page in configuration
mode.
Verify that ARINC 429 Out 3 is
configured for Radar Format 1.
Verify the configuration of the
weather radar.
Check wiring.
Check weather radar status
page on the GTN in
configuration mode.
Refer to the weather radar
installation manual.
Refer to the weather radar
installation manual for
troubleshooting.
190-01007-A1
Rev. 6