Lufft VENTUS-UMB - 17 Fault Description

Operating Manual V25/09.2019 Ventus / Ventus-X / V200A
Chapter 17 Fault Description 36
17 Fault Description
Fault Description
Cause - Remedy
The device does not allow polling or
does not respond
- Check supply voltage
- Check interface connection
- False device ID  check ID; devices are delivered
with ID 1.
Wind direction transmits incorrect
values
Device not correctly aligned  check alignment of
device to North.
Device transmits error value 28h
(40d)
Device is in initialization phase after start-up 
device delivers measurement values after ca. 10
seconds
Device transmits error value 50h
(80d)
Device is being operated above the specified
measuring range
Device transmits error value 51h
(81d)
Device is being operated below the specified
measuring range
Device transmits error value 55h
(85d) for wind measurement
Device unable to carry out valid measurement due to
ambient conditions.
There may be several causes for this:
- Device is being operated above the specified
measuring range
- Very strong horizontal rain or snowfall
- Ventus sensors are heavily soiled  clean sensor
- Ventus sensors are iced up  check heating mode
in configuration and verify function / connection of
heating
- There are foreign bodies in the Ventus measuring
section
- One of the Ventus sensors is faulty  return device
to manufacturer for repair
The quality of the wind
measurement is not always 100%
The device should always transmit 90 – 100% in
normal operation. Values of up to 50% do not
represent a general problem.
When error value 55h (85d) is transmitted, this value
is 0%.
The device may be faulty if it permanently transmits
values below 50%.
Device transmits an error value not
listed here
There may be several reasons for this behavior 
contact the manufacturer’s technical support service.
Minimum value of wind direction is
greater than maximum value
In the case of wind direction, the minimum /
maximum value indicates the direction at which the
minimum / maximum wind speed was measured.