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18
ST30 Bidata Operation and Installation Handbook
Chapter 3: Fault Finding
All Autohelm products are, prior to packing and shipping, subject to
comprehensive test and quality assurance programmes. However, in the
unlikely event that a fault does occur with the ST30 Bidata, the following
table will help to identify the probable cause and provide the most likely
cure.
Fault Cause Action
Instrument display
blank
No supply to
instrument
Check supply
Check cabling and
security of connectors
Check circuit breaker
Return ST30 Bidata for
repair
No speed information Transducer cable
problem
Transducer fouled
Check transducer
connections
Clean paddlewheel
No depth information Aereated water, boat
wakes or propeller
wash
Transducer cable
problem
Depth reading will
return to normal once
clear of disturbed
water
Check transducer
connections
Speed/log information
inaccurate
Unit not calibrated
correctly
Calibrate unit as
described in the Log
Calibration section
Feet/metres display
flashes continuously
Transducer cable or
connector fault
Check cabling and
security of transducer
connector
No exchange of
information between
SeaTalk instruments
SeaTalk cabling or
connector problem
Check security of
SeaTalk connectors
Remove instruments one
by one to isolate
faulty unit