Operating Instructions
37
7.3 Troubleshooting
Action to take in the event of faults
It is the responsibility of the system owner/operator to take suitable action to rectify any faults which occur.
Troubleshooting procedure
The first action to take is as follows:
•
Evaluate the error messages, for example on the display and control module
•
Check the output signal on 4 . . . 20 mA devices
•
Treatment of measurement errors
Check 4
. . .
20 mA signal
Connect a manual multimeter to in the appropriate measuring range as shown on the connection diagram.
The following table describes possible errors in the current signal and helps to rectify them:
Error
Cause
Remedy
4 . . . 20 mA signal not
stable
- Level fluctuations
- Set the damping to suit the device using
the display and control module
No 4 . . . 20 mA signal
- Electrical connection faulty
- Test the connection using the section
entitled Connecting and, if necessary correct
it using the section entitled Connection
diagram
- No voltage supply
- Check cables for continuity and repair them
if necessary
- Operating voltage too low or load
resistance too high
- Check and adjust if necessary
Current signal higher
then 22 mA or lower
than 3.6 mA
- Electronic system in sensor defective
- Replace device or return for repair
