-45-
PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
ERROR 4
This
means
that
there
is
a
Back-up
memory
fault.
Switch
the
unit
off
and
start
again.
If
this
recurs
then
the
Compass
Sensor
PCB
has
developed
a
fault.
This
message
only
appears
in
the
Deviation
Correction
page.
ERROR 6
This
means
that
the
supply
voltage
is
too
low,
below
10.4
volts.
This
message
only
appears
in
the
Deviation
Correction
page.
N O N A V G R
The
Autopilot
control
has
received
No
Navigator
Data.
•
Check
that
the
Data
output
format
from
the
Navigator
is
the
same
as
the
autopilot
is
set
to
receive
(see
Installation
Settings).
•
Check
that
NAV1
or
NAV2
is
selected
correctly
(see
Section
A,
Navigator
Control).
•
There
are
two
LED’s
on
the
PCB
inside
the
Distribution
Box,
one
for
each
NAV
port.
They
will
flash
if
data
is
being
received.
NAV DATA
The
Autopilot
has
received
an
error
code
from
the
Navigator.
•
Check
the
Navigator
for
bad
reception
or
faulty
equipment.
NAV OVFL
The
Autopilot
has
received
more
Navigator
Data
than
it
expected.
•
Clear
the
alarm
by
pressing
the
ALARM
key
(will
not
affect
the
autopilots
operation).
Often
caused
by
not
selecting
the
correct
data
formats.
NAV TIME
The
Autopilot
has
“timed
out”
because
it
has
not
received
expected
Navigator
Data
within
a
predetermined
length
of
time.
•
Check
the
Data
output
from
the
Navigator
WND TIME
The
Autopilot
control
has
timed
out
after
not
receiving
expected
Wind
Instrument
Data.
•
Check
the
Data
output
from
the
Wind
instrument.
If
any
of
these
following
System
faults
are
displayed:-
Press
the
ALARM
key.
This
can
clear
the
condition
if
it
is
only
a
temporary fault. If this fails to clear the fault, revert to compass
control or power off.
The system faults are indicated by numbers indicated below.
Faults with a number greater than 128 will result in the pilot
being switched automatically to ‘Standby’.
Error and Fault Messages
