Manual

51
Maintenance and troubleshooting
Problem
Bargraph
state
Red LED state
Green LED
state
Current or
frequency
output
state
Meaning / Cause Recommended action
The device
does not
respond
OFF Flashes 5 times
briefly every 2 s
Flashes once
every second
22 mA and
0 Hz
The calibration of the full
scale failed because the
fluid velocity > 10 m/s.
→ Clear the error by briefly pressing the
push-button.
→ Check the fluid velocity.
→ Restart the calibration of the full
scale (see chap. 9.8).
The sensor
does not
work
OFF OFF OFF 0 mA
and
0 Hz
The device is not
connected.
→ Connect the device.
The fuse of the installation
is in a bad condition
→ Replace the fuse.
The switch of the instal-
lation is set to OFF
→ Position the installation switch to ON.
- The power supply has
been wrong connected to
the + and - terminals
→ Check the wiring (see chap. 8.3.1,
8.3.2, 8.3.3).
Flashes irreg-
ularly or is off
0 mA
and
0 Hz
The power supply is not
stable.
→ Replace the power supply.
OFF 0 mA
and
0 Hz
The device is out of
service
→ Return the device to your Bürkert
retailer.
Incorrect flow
measurement.
- OFF Flashes once
every second
- The K factor has not been
correctly calculated.
→ Recalculate the K factor (see chap.
6.7).
All the
LEDs are
ON
OFF Flashes once
every second
20 mA and
240 Hz
Measuring range
exceeded by less than
20%.
→ Select the higher measuring range
(see chap. 9.6)
English
Type 8041