Installation Instructions

ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
6-56
FFS Copyright © 2020 All rights reserved.
6.3 Warning Messages
If the FDL-DB-XVR detects a malfunction, the MSG icon appears to indicate that warning
messages are present. Depending on the nature of the malfunction, the FDL-DB-XVR may not
transmit ADS-B messages.
To enter the Warning View mode, press the FN button four times and WARNING will be
displayed top center along with a brief description of the fault. In this mode, the Controller
continually requests the active warning messages from the FDL-DB-XVR and displays them on
the Controller. Press the FN button again to exit this mode and return to normal operation.
TC978 Warning Messages
Warning MSG
Description
Synth Unlock
Transceiver Diagnostic – Timing Fault
Tx Fault
UAT Transceiver fault
Tx Power Low
UAT Transceiver power low during transmit
Tx PSU High
UAT Transceiver power supply output too high
Tx PSU Low
UAT Transceiver power supply output too low
Squitter Fail
System Diagnostic
Remote Hot
FDL-DB Series internal temperature too high
No ADS-B Pos
The unit is not receiving digital serial communication
from the GPS.
GPS Fault
GPS has reported unavailable position or a fault.
Top Ant Fault
Top antenna disconnected
Bot Ant Fault
Bottom antenna disconnected
PSU Fail
Internal DC power supply failure
ADC Fault
ADC or Altitude sensor fault or not responding
6.3.1 TC978 Warning Message Troubleshooting
The following is a quick reference troubleshooting guide using the TC978 Warnings:
Warning
Potential Cause
Troubleshooting
Synth Unlock
Transmitter can’t lock to
carrier frequency
Cycle power on the FDL-DB-XVR.
Return for maintenance if problem persists.