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1.8 Diagnostic of 1
This chapter can help you rapidly resolve minor problems which do not require the intervention
of a specialist. Before contacting technical support, please check the troubleshooting table
below.
The ULTRASONIC SPEEDO sensor comprises a two-colour LED that indicates the state of the
sensor :
The table below provides you with the operating state or the type of fault of the Ultrasonic
Speedo according to the state of the LED :
LED state
LED unlit
green LED
1 flash
▲ 1.5s period
2 flashes
▲▲ ▲▲
3 flashes
▲▲▲ ▲▲▲
Continue
Red LED
1 flash
▲ 1.5s period
2 flashes
▲▲ ▲▲
3 flashes
▲▲▲ ▲▲▲
4 flashes
▲▲▲▲ ▲▲▲▲
4 flashes
▲▲▲▲▲ ▲▲▲▲▲
6 flashes
▲▲▲▲▲▲ ▲▲▲▲▲▲
Continuous
red and green LED
Flashing fast
Flashing slow
The problem may also come from the Loch Sounder Interface : please also refer to the 33-60-
450 user guide. If you do not manage to solve the problem, please contact your distributor.
st
level troubleshooting.
- Sensor power off or out of order.
- Sensor power on, pending locking (detection of moving particles)
- or speed close to 0 or negative
- or sensor off-centre or wrong way round
- or very shallow seabed (<1m) hard and flat
- Sensor locked on one speed, poor level of particles (pure and calm water)
- Sensor locked on one speed, average level of particles
- Sensor locked on one speed, perfect quality of measurement
- Sensor power on, pending locking (no moving particles)
Occasional occurrence if extremely calm water with no current.
- Sudden unlocking at full speed, possible causes are :
•
very shallow seabed (<1m) hard and flat,
•
particles no longer detected (lift or cavitation air layer),
•
crossing of a very turbulent wake (saturation of air bubbles, eddies),
•
Non laminar flow (beneath the hull of very long ships with high tonnage and speed).
•
Angle between the flat surface of the sensor and non-parallel flow.
- Abnormal reflectivity of the ultrasounds on one of the transducers.
Air layer too significant (cavitation). Possible occurrence if the sensor is in the air layer, or if there are stagnant air
bubbles beneath the hull.
- Abnormal reflectivity of the ultrasounds on all the transducers (Same as 3 flashes)
- Measurement disrupted by abnormal ultrasound or electrical transitions (filter the disrupting equipment : high
power alternator, arcs of a power sweep engine, harmonics of a high power sounder, etc.)
- Measurement disrupted by an abnormal ultrasound or electrical carrier (isolate the disrupting equipment : power
supply or battery charger with faulty cutting, SSB transmitter in aviation band).
- self-diagnostic error : product out of order
Ongoing firmware download via the Toplink maintenance software.
Flash memory checksum error : must be reprogrammed via the Toplink maintenance software.
operating state or corresponding fault
Faulty sensor
6 -
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Ultrasonic Speedo sensor - 33-60-043-000
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