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Trouble shooting
20220505H 111
Display
readout
Probable fault Recommended action
Compass data
missing
No data from
selected compass.
1. If more that one compass is
connected to the system, refer to the
USER SETUP menu to select a
different compass.
2. Check connections/Interface menu.
3. Replace compass PCB or interface
PCB (Note: Do not cut cables. The
PCB contains screw terminals).
Comm. failure
active Cntrl
Active control unit
goes silent.
1. Press STBY button on "Inactive"
unit to reset.
2. Check/repair Robnet cable.
3. Replace control unit PCB.
J3XX current
overload
Drive unit shut
down due to
excessive load or
short circuit.
1. Check Drive unit/Drive unit
installation/Manual steering/ Rudder
2. Disconnect Drive unit. If fault is still
present, replace junction unit Power
PCB.
Low 15 volt Internal 15 Volt
supply in Junction
Unit below limit.
1. Replace junction unit Main PCB
2. Replace junction unit Power PCB if
Mains voltage is 12V.
Bypass/clutch
overload
Clutch/bypass
current exceeds 2,5
Amps (overload or
short circuit).
1. Check actual current
2. Check voltage marking on coil
3. Check coil resistance (through
connecting wires)
Bypass/clutch
disengaged
Poor connection or
open circuit in
bypass/clutch coil
1. Check connections
2. Replace bypass/clutch if open.
3. Perform new "Rudder test".
J3XX high
temp.
Excessive
temperature in
Junction Unit
(>75°C), possible
long term overload.
1. Switch off autopilot
2. Check for backload in Drive
unit/steering system.
3. Check that Junction unit
specifications matches Drive unit.
113


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