Warnings And Errors - WIKA PSD-4 Mode D'emploi

6. Faults
In the event of any faults, first check whether the pressure switch is mounted correctly, mechanically and electrically.
If complaint is unjustified, the handling costs will be charged.
Fault
EN
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

Warnings and errors

Via the digital indicator, the instrument's internal warnings and errors are output. The instrument continues to measure,
even when a warning exists. The output signal and the switching outputs are still output.
The following table shows the codes and their meaning.
Warning
ATT1
ATT2
ATT3
ATT4
22
Possible cause
Cable break
No/wrong power supply
Wiring error or switching of switching logic/
analogue signal
Mechanical overload caused by overpres-
sure
Overpressure limit exceeded
Mechanical overload caused by overpres-
sure
Power supply too high/low
Moisture has entered
Diaphragm damaged, e.g. due to impacts,
abrasive/aggressive medium; corrosion at
diaphragm/process connection
Description
On changing the switch point, the reset point of the instrument is automatically reduced to the smallest hysteresis
of 0.25 %.
Zero point adjustment error, current pressure is outside the limits
Password entered for menu access is incorrect
Unit cannot be displayed on digital indicator, previous unit is used
Measure
Check the continuity
Rectify the power supply
Observe the pin assignment
Check the output configuration
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
Fit the cable correctly
Contact manufacturer and replace instrument
WIKA operating instructions pressure switch, model PSD-4