Simrad AP26 Manual De Usuario

Trouble shooting 

20221586B

 121 

Failure active 
Control Unit 

Active control unit 
goes silent. 

1.  Press the STBY button on an 

"Inactive" unit to reset. 

2.  Check/repair Robnet2 cable. 
3.  Replace the control unit PCB. 

ACXX current 
overload 

The drive unit shut 
down due to an 
excessive load or a 
short circuit. 

1.  Check the drive unit and drive unit 

installation/Manual steering/ 
Rudder. 

2.  Disconnect the drive unit. If the 

fault is still present, replace the 
Autopilot Computer Power PCB. 

Low 15 volt 

Internal 15 Volt 
supply in Autopilot 
Computer below 
limit. 

1.  Replace Autopilot Computer Main 

PCB 

2.  Replace Autopilot Computer 

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". 

ACXX high 
temp. 

Excessive 
temperature in 
Autopilot 
Computer (>75°C), 
possible long term 
overload. 

1.  Switch off autopilot 
2.  Check for backload in Drive 

unit/steering system. 

3.  Check that the autopilot computer 

specifications matches Drive unit. 

Memory failure 
ACXX 

Wrong checksum 
on memory 
parameters or 
variables. 
Autopilot 
Computer will use 
default values. 

Perform a "Master reset" and make a 
new "Dockside set-up". Switch off 
and on again. If the alarm is repeated, 
replace Autopilot Computer Main 
PCB.