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Installation and operating instructions • Wilo-Rexa PRO-S • Ed.01/2022-03
Fault: Pump does not start
1.
Electricity supply interrupted or short-circuit/earth fault in the cable or motor winding.
⇒
Have the connection and motor checked by a qualified electrician and replace if ne-
cessary.
2.
Tripping of fuses, of the motor protection switch or the monitoring device
⇒
Have the connection and the monitoring device checked by a qualified electrician
and change it if necessary.
⇒
Have the motor protection switches and fuses installed and adjusted according to
the technical specifications by a qualified electrician and reset monitoring device.
⇒
Check the impeller to make sure that it runs smoothly, clean the hydraulics if ne-
cessary.
3.
The sealing chamber control (optional) has interrupted the electric circuit (connection-
related)
⇒
See “Fault: Mechanical seal leakage, sealing chamber control reports a fault and
switches the pump off”.
Fault: Pump starts up, motor protection trips after short period
1.
Motor protection switch set incorrectly.
⇒
Have the adjustment of the trigger checked and corrected by a qualified electrician.
2.
Increased power consumption due to major voltage drop.
⇒
Have the voltage of individual phases checked by a qualified electrician. Contact the
electricity distribution network.
3.
There are only two phases at the connection.
⇒
Have the connection checked and corrected by a qualified electrician.
4.
Excessive differences in voltage between the phases.
⇒
Have the voltage of individual phases checked by a qualified electrician. Contact the
electricity distribution network.
5.
Incorrect direction of rotation.
⇒
Have the connection corrected by a qualified electrician.
6.
Increased power consumption through jammed hydraulics.
⇒
Clean the hydraulics and check the inlet.
7.
The density of the fluid is too high.
⇒
Contact customer service.
Fault: Pump runs, there is no volume flow
1.
There is no fluid.
⇒
Check the inlet, open all gate valves.
2.
Inlet clogged.
⇒
Check the inlet and remove clogging.
3.
Hydraulics jammed.
⇒
Clean the hydraulics.
4.
Pipe system on the pressure side or pressure hose clogged.
⇒
Remove clogging and replace the damaged components if necessary.
5.
Intermittent operation.
⇒
Check the switching system.
Fault: Pump starts, duty point is not reached
1.
Inlet clogged.
⇒
Check the inlet and remove clogging.
2.
Slide valves on the pressure side closed.
⇒
Completely open all gate valves.
3.
Hydraulics jammed.
⇒
Clean the hydraulics.
