Maintenance And Service; Error Messages; General Recommendations - E+E Elektronik EE741 User Manual

8 Maintenance and Service

8.1

Error Messages

Error messages are available at the status LEDs and on the status page of the optional display.
Green LED
Fig. 26 Status LED - error message
LED States
Green Red
Flashes Off
Flashes On
Flashes Flashes
Tab. 12 Explanation of the status led indicator
8.2

General Recommendations

It is recommended to calibrate the EE741 flow sensor on a yearly base.
For use with polluted media, the sensing head should be cleaned periodically.
Red LED
Description
No error
EEPROM faulty
Cause:
The consumption meter status
and the MIN / MAX values are no
longer available.
Display error
Cause:
The display or the communication
with the display is faulty.
Sensor fault
Cause:
The sensing head is faulty.
Consequence:
All current measured values
are shown on the display. The
analogue, switch and pulse
outputs operate normally.
Consequence:
Analogue, switch and pulse
outputs operate normally
Consequence:
All measurands on the display are
frozen at the lowest possible value,
3
e.g. -20 °C (-4 °F) or 0 m /h.
The analogue output is frozen at
21 mA (NAMUR NE43).
Inline Flow Sensor for Compressed Air and Gases | 28
User Manual EE741
Recommended Action
Return the unit to E+E
for service
Return the unit to E+E
for service
Return the unit to E+E
for service