Troubleshooting
LD900 Installation and Oper ations M anual
60
5.8 INS Issues
GNSS Heading not enabled
Navigate to
Configuration > Heading
and
conf irm that
State
is set to
Enabled
. If not
proceed to set to
Enabled
.
GNSS antenna voltage turned off.
Check
Receiver > Antenna
to ensure that
voltage is switched on for the
GNSS
Secondary
(GNSS2) antenna.
Lack of common satellites between
antennas.
Ensure adequate spacing has been
provided between both antennas while
avoiding masking from vessel
superstructure.
Fault Description
Possible Cause
Solution
No INS available
No GNSS reception from GNSS1
antenna.
Check the LD900 Status Page to see if
valid GNSS signals are being received
(GNSS icon should be green). A red GNSS
icon and no constellations highlighted
indicates a problem with the GNSS1 feed.
Check coaxial connection to GNSS1 and
inspect antenna and cabling for damage.
Conf irm that there are no potential sources
of interference or physical obstructions
around the GNSS1 antenna.
No GNSS reception from GNSS2
antenna.
Check coaxial connection to GNSS2 and
inspect antenna and cabling for damage.
Conf irm there are no potential sources of
interf erence or physical obstructions
around the GNSS2 antenna.
INS not enabled
Navigate to
Configuration > Heading
and
conf irm that
State
is set to
Enabled
. If not
proceed to set to
Enabled
.
GNSS antenna voltage turned off.
Check
Receiver > Antenna
to ensure that
voltage is switched on for the
GNSS
Secondary
(GNSS2) antenna.
Lack of common satellites between
antennas.
Ensure adequate spacing has been
provided between both antennas while
avoiding masking from vessel
superstructure.
Disconnection to IMU
Check that the IMU is both powered on
and connected to the COM port specified
within
Configuration > INS
.
