WIKA PSD-4-ECO, Operating Instructions Manual

Page: 23 / 140

14247391.01 07/2019 EN/DE/FR/ES
23 WIKA operating instructions, model PSD-4-ECO
EN
Fault Possible cause Measure
No output signal Cable break Check the continuity
No output signal No/wrong power supply Rectify the power supply
No/wrong output signal Wiring error or switching of switching logic/
analogue signal
Observe the pin assignment
Check the output configuration
Constant output signal upon change in
pressure
Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Deviating zero point signal Overpressure limit exceeded Observe the permissible overpressure limit
Signal span too small Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Signal span too small Power supply too high/low Rectify the power supply
Signal span drops Moisture has entered Fit the cable correctly
Warnings and errors
Via the digital display, 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 Description
ATT1 On changing the switch point (SP1 / SP2) and the upper display limit value CLRH, the reset point / lower display
limit value (CLRL)) of the instrument is automatically reduced by the smallest hysteresis of 0.25 %.
ATT2 Zero point offset, current pressure is outside the limits
ATT3 Password entered for menu access is incorrect
ATT4 Unit cannot be displayed on digital display, previous unit is used
ILOC Menu locked over IO-Link
OL Overpressure, measuring range exceeded > approx. 3.125 % (digital display flashing)
PAS Prompt for password input
UL Underpressure, below measuring range < approx. 3.125 % (digital display flashing)
6. Faults