Fault Finding; System Fault Messages - Endress+Hauser RMA 422 Mise En Service

6. Fault finding and repair
During production all units go through a number of quality
control stages. In order to assist you in fault finding we have
listed a number of possible faults, causes and solutions.

6.1 System fault messages

Faults that could occur during the self test or during operation
are immediately indicated on the red LED or on the display.
Acknowledgeable fault messages are deleted either using the
PC software or by operating a push button and are accessed in
the operating menu under the function group "Operating
parameters" in the operating address "Actual fault"
Green Red Effect
LED LED
Off Off No measured
value
display
On Off No measured
value
display
On Off The 7 seg-
ment display
shows a
meas. value
The 7 seg-
ment display
shows an
incorrect/
inaccurate
measured
value
Cause
No power supply connected
Unit defective
Fuse of power supply defective
Unit defective
Display defective
Sensor incorrectly connected
Sensor defective
Process transmitter incorrectly set up
Process transmitter defective
Normal fault free operation
Measurement input incorrectly set up
Sensor calibration faulty
Offset incorrectly set up
Process transmitter
AERR
.
Fault Solution
code
Please check the
power supply to the
unit
Please exchange the
unit
Please replace the
fuse (see technical
data)
Please exchange the
unit
Please replace the
display
Connect the sensor
to the connection
diagram (chapter 3)
(polarity).
Change sensor
Please chaeck the
input range
Replace unit
E 000
Change set up in
operating menu
Compensate fault
using offset
Check offset
65