Operation Manual

M-2 AIS Operation Issue 1 47
Reviewing Alarm Mode information
Alarm Mode: All events log
View a list of all system alarm events and UTC time of alarm event activation.
Alarm Mode: View current alarms page
View a list of alarm events that are still active and the UTC time of activation.
Before calling an authorised Service Centre perform the following checks and
note detail of any alarm events:
Symptom Cause Cure
Display will not power
up
No power to the
transponder unit
Cable or plug fault
System fault
See below
Also check cabling and
plug connections.
Transponder PWR
(power) LED (under
dust cover) is OFF
No power to
transponder
Transponder fuse is
blown.
Verify that power supply is
available at the
transponder power input
connector
Check / replace
transponder fuse.
No text on Display
screen or too dark or
lacking in contrast
Poor LCD backlight
and/or contrast
adjustment
Adjust LCD backlight
and/or contrast. Hold
Display dimmer key for 5
seconds to enter display
setup mode.
Antenna VSWR fault
alarm activates
VHF Antenna
installation
Check the VHF coaxial
cable/connections
Check VHF antenna for
damaged.
Tx malfunction alarm
activates
System fault Contact Service Centre
Tx or Rx channel 1, 2,
DSC malfunction alarm
System fault Contact Service Centre
Position sensor not
available alarm
Internal and external
GNSS / GPS signal lost
Check AIS GNSS /GPS
antenna coaxial
cable/connections
Check GPS antenna for
damage
Check that external GNSS
is working correctly
External EPFS lost
alarm
GNSS / GPS signal lost Check that external GNSS
is working correctly
No Valid COG and
SOG alarm
GNSS / GPS signal lost Check that external GNSS
is working correctly
No Valid SOG alarm Bottom track log Check function of Bottom