Fault Finding, Repair And Maintenance; Diagnosis/Test Function; Unit Operation During Fault; Fault Finding And Cure - Endress+Hauser eco-graph a Betriebsanleitung

6. Fault finding, repair and maintenance

6.1 Diagnosis/
Test functions:
(access fro main menu)
6.2 Unit operation
during fault

6.3 fault finding and cure

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6. Fault finding, repair and maintenance
Service functions for fast unit checks in installed condition. Display test and testing
the digital inputs and relays. Protected by the security code "6051" in order to avoid
unintentional faulty use.
Functions:
- Display test
- Test digital I/O
- Calibration
Warning: so long as these functions are being used the normal measured value plot
is interrupted.
Hint: Each time this function is accessed it is recorded in the events table. Calibration
should only be carried out by skilled and trained personnel (in order to smooth
measurement chain tolerances please usee the "Offset" function - see "Analogue
inputs").
The videographic recorder informs the user of faults or faulty operation by displaying
a text on the screen.
Problem
Analogue input displays
"———" or "∧∧∧∧∧∧".
Display does not operate.
Display does not operate.
Diskette drive does not
operate.
Cause
The signal cables are either
incorrectly or not connected.
The input signal is not the same
as the signal set up.
The sensor is defective.
No illuminated LED => No
power supply.
No illuminated LED => Unit fuse
defective.
No illuminated LED => Power
supply or CPU defetive.
LED illuminates => Display
defective.
LED illuminates => CPU
defective.
Diskette drive defective.
CPU defetive.
Solution
Please check the connections.
Please check the input signal
and the unit setting up.
Please check the input signal
and replace the sensor.
Please ccheck the power
supply and connections.
Please check the fuse on the
power supply (see chapter
6.5.1).
Please replace power supply or
CPU (dependent on fault).
Please replace the Display.
Please replace the CPU.
Please replace the Diskette
drive.
Please replace the CPU.