Raymarine ST70 Instrument, Руководство по эксплуатации

Страница: 69 / 82

Chapter 4: Maintenance & Troubleshooting 61
If it appears that ST70+ is not operating satisfactorily, check the symptoms below to
determine how to resolve the problem:
•
Nothing on the display screen – refer to Figure 4-1, Troubleshooting chart 1 .
• Data missing from the display screen – refer to Figure 4-2, Troubleshooting
chart 2 .
• Data on the display screen is garbled – refer to Figure 4-3, Troubleshooting
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.
Boat turns slowly and takes a
long time to come onto course,
under autopilot control Rudder gain too low. Complete AutoLearn or increase
gain setting (see
Chapter 3: Setup Information) .
Boat overshoots when turning
onto a new course under
autopilot control Rudder gain too high. Complete AutoLearn or decrease
gain setting (see
Chapter 3: Setup Information) .
The autopilot ‘hunts’ when
trying to position the rudder Increase the rudder damping one level at a time until the
autopilot stops hunting, and always use the lowest
acceptable value. (see
Chapter 3: Setup Informa-
tion) .
Symptom Possible cause/remedy
85024_1.book Page 61 Tuesday, January 27, 2009 11:31 AM