Kongsberg Simrad Robertson AP300X Series Instruction Manual page 117

Display readout
Drive unit shut
J3XX current
down due to
overload
excessive load or
short circuit.
Internal 15 Volt
Low 15 volt
supply in Junction
Unit below limit.
Clutch/bypass
Bypass/clutch
current exceeds 2,5
overload
Amps (overload or
short circuit).
Poor connection or
Bypass/Clutch
open circuit in
disengaged
bypass/clutch coil
Excessive
J3XX high temp.
temperature in
Junction Unit
(>75°C), possible
long term overload.
Wrong checksum
Data failure
on memory
J3XX
parameters or
variables. Junction
unit will use
default values
Junction Unit faulty
Com. failure
or possible poor
with J3XX
connections in
Robnet cable from
same.
Mains voltage less
Low supply
than 9 Volts
voltage
J300X, J300X-40
High supply
Mains exceeds 44V.
voltage
J3000X Mains
exceeds 29V
22081814H
Probable fault
1. Check Drive unit/Drive unit
2. Disconnect Drive unit. If fault still present,
1. Replace junction unit Main PCB
2. Replace junction unit Power PCB if Mains
1. Check actual current
2. Check voltage marking on coil
3. Check coil resistance (through connecting
1. Check connections
2. Replace bypass/clutch if open.
3. Perform new "Rudder test".
1. Switch off autopilot
2. Check for backload in Drive unit/ steering
3. Check that Junction unit specifications
Perform a "Master reset" and make a new
"Dockside set-up". Switch off and on again. If
the alarm is repeated, replace Junction unit
Main PCB.
1. Check Robnet connectors and cable.
2. Replace Junction unit Main PCB.
1. Verify by System Data Menu
2. Switch autopilot off, charge batteries
3. Check/repair battery charger
1. Verify by System Data Menu
2. Switch autopilot off
3. Check / repair battery charger
Recommended action
installation/Manual steering/Rudder
replace junction unit Power PCB.
voltage is 12V.
wires)
system.
matches Drive unit.
Trouble Shooting
115