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7
Error Messages
Error messages are available on the status page of the display and at the status LEDs.
Green LED
Fig. 22
Status LED - error message
0: no error / green LED flashes
1: EEPROM faulty / green LED flashes, red LED lights up
Cause:
Consequence: The consumption meter status and the MIN/MAX values are no longer available.
Remedy:
2: Display error / green LED flashes, red LED lights up
Cause:
Consequence: Analogue, switch and pulse outputs operate normally.
Remedy:
4: Sensor fault / green LED flashes, red LED flashes
Cause:
Consequence: All measurands on the display are frozen at the lowest possible value e.g. -20 °C
Remedy:
8
Maintenance
It is recommended to calibrate the EE741 flow sensor on a yearly base.
For use with polluted media, the sensing head should be periodically cleaned.
User Manual EE741 Inline Flow Sensor for Compressed Air and Gases
Red LED
The EEprom for storing the consumption meter status and the MIN/MAX values
is faulty.
All current measured values are shown on the display. The analogue, switch and
pulse outputs operate normally.
Return the device to the manufacturer for service.
The display or the communication with the display is faulty.
Return the device to the manufacturer for service.
The sensing head is faulty.
or 0 m³/h. The analogue output is frozen at 21 mA (NAMUR NE43).
(-4 °F)
Return the device to the manufacturer for service.
23
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