Simrad AP50 Autopilot
48 20221032 / E
Display readout Probable fault Recommended action
Bypass/clutch
overload
Clutch/bypass current
exceeds specified load
(overload or short circuit)
1. Check actual current
2. Check voltage marking on coil
3. Check coil resistance (through
connecting wires)
Memory failure Wrong checksum on
memory parameters or
variables in the J50
Junction Unit or GI51
Gyro Interface.
Switch off and on again. If the
alarm is repeated and a GI51 is
installed, switch off – disconnect
GI51 – switch on again. If the
alarm is repeated, the fault has been
located to J50, otherwise GI51 has
caused the fault.
If installed, reconnect GI51,
perform a "Master reset" and make
a new "Dockside” and “Interface”
set-up. Switch off and on again. If
the alarm is repeated, replace
Junction unit Main PCB or GI51.
Com. failure with
J50
Faulty junction unit or
poor Robnet cable
connections from the
junction unit.
1. Check the Robnet connectors
and cable.
2. Replace the junction unit Main
PCB.
Low supply voltage Mains voltage less than 9
V.
1. Verify in the System Data menu
2. Switch autopilot off and charge
batteries.
3. Check/repair battery charger.
High supply
voltage
J50, J50-40 Mains
exceeds 44 V.
1. Verify in the System Data menu
2. Switch the autopilot off.
3. Check/repair battery charger.
Compass
difference
The difference in
readings between the
main compass and the
monitor compass exceeds
the limit set for
“Compass difference”.
Check the operation of both
compasses (Refer to the Installation
Manual, System Data). If one
compass is magnetic, the error may
be caused by deviation change or
heavy sea disturbances (Refer to the
Installation Manual, Compass
Difference).
Speed missing
(Automatic reset
when available, see
page 31)
The speed signal from
the GPS or the log is
missing (15 sec. delay).
Check the GPS, log, and cable
connections.