WSS 500 Series
User’s Manual/Installation Note
DEIF A/S
Page 18 of 25
Troubleshooting a WSS/WSDI-2 installation
No. Fault symptom
on WSDI-2
Cause/solution
1
No light in LEDs,
backlight or display
Aux. voltage is not available (18 to 31 V DC), or the WSDI-
2 is damaged.
2
Orange Error LED is
flashing
The WSDI-2 is defective, contact DEIF or a sales/service
representative.
3
Wind speed is “----“
and direction is not
changing
Cause: There is no valid wind data via RS-485 from the
wind sensor.
Check if the RS-485 port on the WSDI-2 is terminated.
See the WSDI-2 manual:
Check that “input select” is correct (0183 or r.183).
Use the WSDI-2 “Error functions” to find the type of error:
- Communication error (noise or bad connection).
- Error message from WSS sensor received (sensor may
be damaged or defective).
- LED indication for received and transmitted RS-485 data.
If there is no data communication:
- Check voltage from WSDI-2 terminals 7-8 and 9-8, it must
be 2 to 3 V DC on both. If not, the COM port may be
damaged in the WSS or WSDI-2 (lightning stroke,
insufficient lightning protection?), or
- Check the cable connection (broken or short-circuited).
4
Wind speed and
direction is dropping
out periodically
- Bad connection.
- The WSS is not grounded correctly on stainless
mounting tap.
- Heavy electrical noise or insulation error in the ship’s
electrical system (AC or DC).
- The WSS is not able to calculate valid data - snow, ice,
extreme rain or defective sensor head (lightning, bird
attack?).
5
Wind speed and
direction is dropping
out or instable when
outdoor temperature is
dropping below 5 °C
- The sensor is a WSS-L without heating - ice?
- The aux. power supply is not able to supply current
enough to drive the WSS heater. (24 V DC power supply
>2 A is recommended).
6
Wind speed is ”----“
and direction is not
changing when an
additional device
(VDR or Nav system)
is connected in
parallel on the RS-
485 port (A and B)
The added device is most likely overloading the RS-485
bus (only one extra NMEA input is allowed).
Termination on the RS-485 bus is missing.
The connection to the added device is damaged or short-
circuited.
Cable screen is wrongly connected, making a noise loop.
Solution: Use an NCI-1 NMEA converter (out) or an NMEA
buffer to solve the problem.
