Troubleshooting; First Considerations; Procedures - Raymarine ST70 User Reference Manual

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4.2 Troubleshooting

In the unlikely event that you encounter problems using your ST70 autopilot
controller, use this section to resolve the situation.

First considerations

If your ST70 is not performing as you think it should, be sure you are operating it
correctly as described in the ST70 Pilot Operating Guide.
Then:
• Ensure that any data you think may be missing is available on your boat. For
example, if you do not have a wind transducer, then there will be no wind-related
data.
• Take into account any changes that may have been made to the electrical system
aboard your boat. Such changes could affect the performance of your ST70 con-
troller.
• Be aware that radio signals transmitted nearby (for example from another boat or
shore station) could affect the performance of your ST70 controller.
If you are satisfied that the problem is not due to any of the above, use the procedures
in this section to isolate the cause of the problem.

Procedures

If it appears that an ST70 controller is not operating satisfactorily, check the
symptoms below to determine how to resolve the problem:
• Nothing on the controller screen – refer to Figure 4-1, ST70 troubleshooting –
Chart 1 .
• Data missing from the controller screen – refer to Figure 4-2, ST70 troubleshoot-
ing – Chart 2 .
• Data on the controller screen is garbled – refer to Figure 4-3, ST70 troubleshoot-
ing – Chart 3 .
• Specific data types are missing or incorrect:
• Check the relevant Transducer and Pod, including the connections between
them and to the system.
• If speed readings are missing or obviously wrong, the speed transducer pad-
dle wheel could be fouled and need cleaning.
ST70 Pilot Controller Reference Guide