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Mechanical faults on pumps with and without controller
Fault
Possible causes of the fault/ visible
Remedy
No pressurization/ too slow pressurization
Wear on the piston of the change-over cartridge
Leakage of the line system or of the metering
device
Grease leaking from the leak grease bore of the
change-over cartridge. Replace change-over
cartridge.
Check and replace any defective parts.
No change-over procedure is triggered.
Interruption of the control line
End-of-line pressure switch does not give any
signal
Check electrical lines to and from the
EM-U3/ WS-E.
Check end-of-line pressure switch.
Change-over devices runs permanently.
PLC controls the EM-U3/ WS-E wrongly.
(more than 1 signal)
Defective position switch of the EM-U3/WS-E
Check whether there is more than 1 signal from
the PLC pending, if so, correct it.
Remove the EM-U3/ WS-E and send it to the
manufacturer.
If the fault cannot be determined and remedied, please contact our Customer Service.
10. Troubleshooting
10. Troubleshooting
