Troubleshooting
20222410 / B 117
Display readout Probable fault Recommended action
No rudder
response
(cont’d)
Improper steering gear
operation.
Check that the steering gear has been
started and set for autopilot operation.
If in use, make sure that the ON and
MODE signals from JD5X are given
correctly (ref. Figure 2-20). Also check
for correct setting of switch S6-S9, LED
D903 for ON and D904 for MODE.
No rudder cntrl
voltage
1. External reference
voltage missing for
analog rudder
control.
2. Internal voltage
missing for ±10V
or 4-20 mA analog
rudder control.
Check reference voltage on Dual Analog
Board TB20 and TB22.
Wrong setting of S1-S4.
Check internal ±12V.
Drive 1:
+12V between S1-left and TB20-2.
–12V between S2-left and TB20-2.
Drive 2:
+12V between S3-left and TB22-2.
–12V between S4-left and TB22-2.
Rudder feedb.
failure
Installation settings
have been changed
from analog rudder
control to solenoid
systems.
Enter Dockside installation and re-install
analog rudder control.
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