Garmin MX20 Installation Manual page 72

Troubleshooting
Problem
Unit shows LINK data flag.
Unit shows TRAF data flag.
Unit shows ADSB data flag.
MX20 runs hot.
62
Table 5-1. Troubleshooting Guide Cont'd
Cause
1. Unit is not WSI sensor capable.
2. Data port configuration incorrect 2. Ensure that the data port
3. WSI InFlight sensor function not
enabled.
4. WSI InFlight sensor not powered
up; not functioning properly.
5. Wiring connects are incorrect.
1. Unit is not Traffic capable.
2. Data port configuration incorrect. 2. Ensure that the data port
3. Traffic function not enabled.
4. Traffic unit not powered up; not
functioning properly.
5. Wiring connections are incorrect. 5. Verify serial wiring and pin
1. The GDL 90 UAT internal GPS
receiver is reporting an invalid
position or is unable to compute a
position.
2. The traffic unit is not a GDL 90
UAT.
1. Arrangement of avionics and
installation area does not provide
sufficient airflow.
560-1025-09 Rev E
Solution
1. Ensure that the model MX20 is
WSI sensor capable.
configuration is correct and the
WSI sensor is set correctly.
3. Ensure that the WSI sensor
function is enabled.
4. Ensure that the WSI sensor has
power applied and is functional.
5. Verify wiring and pin connections.
1. Ensure that the model MX20 is
traffic capable.
configuration is correct and
matches how the unit is wired for
the serial interface.
3. Ensure that the traffic function is
enabled.
4. Ensure that the Traffic unit has
power applied and is functional.
connections.
1. The ADSB data flag is displayed
at start-up during normal GPS
receiver signal acquisition. If the
data flag is displayed for more
than five minutes after the GDL
90 UAT is turned on and the GPS
antenna has a clear view of the
sky, refer to the troubleshooting
section of the GDL 90
Installation Manual.
2. Disable the GDL 90 selections in
the Install-Misc installation menu.
1. If an internal fan is present, verify
that it is operational and that the
opening is clear of obstructions.
The fans should turn on when the
unit's internal temperature is
approximately 95-100ºF. If an
internal fan is not present, one
may be installed by the factory.
Contact factory.
MX20 Installation Manual