Faults; Error Display - WIKA PSA-31 Manual De Instrucciones

8. Faults

8. Faults
In the event of any faults, first check whether the pressure switch is mounted correctly, mechanically and
electrically.

Error display

Via the instrument's display internal errors are output.
The following table shows the error codes and their meaning.
Error Description
ATT1 On changing the switch point, the system automatically reduces the reset point.
ATT2 Zero-point adjustment error, current pressure is outside the limits
ATT3 Password entered for menu access is incorrect
ERR Internal error
OL Overpressure, measuring range exceeded > approx. 5% (display blinks)
UL Underpressure, below measuring range < approx. 5 % (display blinks)
Acknowledgement of an error display by pressing the "Enter" key.
Problem
No output signal
No output signal
No/wrong output signal
Constant output signal upon
change in pressure
Deviating zero point signal
Signal span too small
Signal span too small
Signal span drops
Signal span drops/too small
If complaint is unjustified, we will charge you the complaint processing fees.
WIKA operating instructions pressure switch model PSA-31 for sanitary applications
Possible cause
Cable break
No/wrong power supply
Wiring error
Mechanical overload caused by overpressure
Overpressure limit exceeded
Mechanical overload caused by overpressure
Power supply too high/low
Humidity has entered
Diaphragm damaged, e.g. due to impacts, abrasive/
aggressive medium; corrosion at diaphragm/process
connection
Measure
Check the continuity
Rectify the power supply
Observe the pin assignment
Replace instrument; if it fails repeatedly,
contact the manufacturer
Observe the permissible overpressure limit
Replace instrument; if it fails repeatedly,
contact the manufacturer
Rectify the power supply
Assemble the cable correctly
Contact manufacturer and replace instrument
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