30
WIKA operating instructions pressure switch, model PSD-3x
EN
11430486.07 04/2015 EN/DE/FR/ES
Problem
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
Observe the pin assignment
Constant output signal upon change
in pressure
Mechanical overload caused by over-
pressure
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 over-
pressure
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
Humidity has entered
Assemble the cable correctly
Signal span drops/too small
Diaphragm damaged, e.g. due to
impacts, abrasive/aggressive medium;
corrosion at diaphragm/process
connection
Contact manufacturer and replace
instrument
If complaint is unjustified, we will charge you the complaint processing fees.
CAUTION!
If deficiencies cannot be eliminated by means of the measures listed above, shut down the
instrument immediately, and ensure that pressure and/or signal are no longer present, and
secure the instrument from being put back into operation inadvertently. In this case, contact
the manufacturer. If a return is needed, follow the instructions given in chapter 9.2 "Return".
8. Faults
