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Chapter 2: Maintenance and Fault Finding
Low battery
Display blank
D D D D D epth reading
flashes when
under way
No depth
information
DEPTH
ST40
DEPTH
ST40
DEPTH
ST40
1 minute
ST40
Action
Recharge your vessel's battery as
soon as possible
D4735-2
Action
Check fuse/circuit breaker.
Check power supply.
Check SeaTalk cabling and
D4736-2
connector security.
Action
Ensure that reading stabilises when
clear of disturbed water, e.g. boat
wakes, propeller wash etc.
D4661-2
Action
Check the condition of the
transducer cable and the security of
the connections.
DEPTH
This symptom could also be caused
by weed on the transducer face.
DEPTH
D4660-2
9
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