Furuno DD-80 - Manual (Page 68)

9 – 2
GPS No fix
Figure 9-5 GPS error message
This message may appear when there is an
interfering object between the satellite and
GPS receiver (for example, mast) or the an-
tenna cable is disconnected.
DOP error
When PDOP value exceeds 6 in the 3D mode,
or HDOP value exceeds 4 in the 2D mode,
this error occurs and following indication ap-
pears.
DOP Error
Figure 9-6 DOP error message
DGPS error
When DGPS data contains errors or the DGPS
beacon station is experiencing transmitting
problems, the message shown in Figure 9-7
appears.
DGPS error
Figure 9-7 DGPS error message
Self test error message
If the self test (conducted when turning on
the power) finds equipment error, the mes-
sage shown in Figure 9-8 appears.
GPS No fix GPS SELFTEST error XX
Figure 9-8 Self test error message
If the self test error message appears, consult
your dealer for advice.
9.2 Preventative Maintenance
Regular maintenance is necessary to maintain
performance. Check the items mentioned be-
low monthly to keep the equipment in good
working order.
Antenna unit
Check for fixing bolts for tightness.
Antenna cable
Check connector for tightness, rust, damage
and water leaks.
Power cable
Check for tight connection.
Ground terminal
Check for rust and tight connection.
Fuse
The 2A fuse in the power cable protects the
unit from overvoltage and equipment fault. If
the fuse blows, find out the cause before re-
placing the fuse. If the fuse blows after re-
placement, request service.
CAUTION
Use of a wrong fuse can cause
permanent equipment damage.
9.3 Error Messages
Error messages appear on the display to alert
you to possible trouble.
GPS error
When GPS signal is suddenly lost and posi-
tion cannot be calculated within one minute
the message shown in Figure 9-5 appears.