___________________________________________________________
Page 4-6
GNS 400W Series Maintenance Manual
Rev. A
190-00356-05
Table 4-1. Fault Messages and Recommended Actions (continued)
VLOC has failed
The unit has detected a
failure in the VLOC receiver.
Replace the nav receiver.
VLOC needs service
N/A
Replace the nav receiver.
VLOC not responding
Internal system-to-system
communication between the
main processor and the
VLOC receiver has failed.
Check the applicable flex
cable.
Replace the nav receiver.
Return the unit for service.
