Raymarine AUTOHELM ST50 PLUS DEPTH User Manual

ST50 plus Depth Operation and Installation Handbook
Chapter 3: Fault Finding and Maintenance
Chapter 3: Fauit Finding and Maintenance
3.1 Fault Finding
All Autohelm products are, prior to packing and shipping, subjected to
comprehensive test and quality assurance programmes. However, if a fz
arises with the ST50 Flus Depth, the following table will help to identify the
probable cause and provide the most likely cure.
Fault
Instrument display
blank.
Cause
No supply.
Action
Check supply.
Check cabling and
security of SeaTalk
connectors.
Check fuse/breaker.
Return unit for repair
Instrument displays
‘CODELOCK set’,
ENTER CODE.
The ‘CODE Lock Enter correct code
feature has been set. number.
No exchange of SeaTalk cabling
information between problem.
SeaTalk instruments
tie, illumination levels).
Check securii of
SeaTalk connectors.
Remove instruments
one by one to isolate
faulty unit.
Failure of a group of SeaTalk
instruments in SeaTalk cabling/connector
chain. problem.
Check security of
SeaTalk connectors
between functioning
and nonfunctioning
instruments.
Depth reading Transducer
Check cabling and
continuously flashes cable/connector securii of transducer
@e;th greater than 3
problem. connector.
Depth reading flashes Aereated water, boat
Normal reading will
while underway. wakes, propellor wash return when clear of
etc. disturbed water.
IX
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Raymarine AUTOHELM ST50 PLUS DEPTH Specifications

Power

power supply	10 to 16 V
power consumption	100 mA
illumination levels	3 levels plus off

Operating Environment

temperature range	0 to 70 °C
shallow alarm	10 to 400 feet (3 to 120 metres)
deep alarm	0 to 600 feet (0 to 180 metres)

Weight and Dimensions

dimensions	110x110 mm (4.33x4.33 in)
depth	0 to 600 feet (0 to 180 metres)
minimum depth	3 to 33 feet (1 to 10 metres)