User's Manual

6-9
Symptom of Error Possible Cause or Cause of Fault Countermeasures
Internal GPS data
cannot be loaded.
Internal GPS malfunction Execute TEST2 of self-diagnosis.
If the result is “NG”, replace the
transponder.
External GPS data is abnormal. Confirm the external GPS setting.
If there is any failure, replace the
external GPS.
There is a difference
between internal GPS
data and external GPS
data.
Internal GPS data is abnormal. Replace the transponder.
External senor data is abnormal. Confirm the external sensor setting.
If there is any failure, replace the
external sensor.
Heading data is
mismatched.
The value of NSK unit is abnormal. Re-set the initial value of NSK unit.
If the setting is not available, check
the dip switch setting.
In case of another, replace the NSK
unit.
There is a difference
between Nav status
and actual Nav status.
Nav status is set by “at anchor”,
“moored” or ”aground”. And SOG is
over 3kn. The condition that Nav
status is set by “under way sailing”.
And SOG is under 1kn is continued
for 2 hours or more.
Change the Nav status to another.