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PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
Troubleshooting
Guide
and
Fault
Messages”
after
this.
Check
the
heavy
duty
supply
to
the
Distribution
Box.
In
the
Distribution
Box:
Check
fuse
FS3.
Check
that
the
relay
(left
rear
of
PCB)
switches
when
going
from
STANDBY
to
PILOT
(it
can
be
heard).
If
it
does
not,
suspect
a
relay fault or Regulator (REG2) fault. If it does, suspect a drive
FET or logic failure on the Distribution Box PCB.
If you suspect a faulty motor, test it by powering the motor
directly from a suitable battery.
Centre the helm and retry to ensure you are inside the electronic
limits.
If using a Rudder Feedback Unit without integral limit switches,
check that the DIL switches 5 & 6 in the Distribution Box are
switched ON. If using a Rudder Feedback Unit with integral
limit switches , check that the switches are working.
Otherwise suspect a drive FET or logic failure on the
Distribution Box PCB.
Low battery voltage.
Motor cable or supply cable too small.
Motor faulty. Check brushes etc.
On hydraulic systems check hydraulic fluid level. On mechanical
systems check that the Clutch output and Motor Clutch are
working.
Indicates a wiring error on either the Rudder Feedback Unit or
the motor drive connections, probably in the Distribution Box
and possibly the Phasing of them.
Also check that the Rudder Feedback Unit arm has not become
disconnected.
6. The autopilot
powers up but
displays a System
Fault which
cannot be reset.
10. Motor drives
hard over when
autopilot
is
engaged
9. Motor drives
both ways but
lacks power.
8. Motor drives
one way only
7. Autopilot
engages but
motor does not
drive
