en
Installation and operating instructions • Wilo-Rexa PRO-S • Ed.01/2022-03
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4.
Incorrect direction of rotation.
⇒
Have the connection corrected by a qualified electrician.
5.
Air cushion in the pipe system.
⇒
Vent the pipe system.
⇒
If air cushions occur frequently: Locate and prevent the air intake, if required install
ventilation systems at specified locations.
6.
Pump pumping against excessive pressure.
⇒
Open all gate valves on the pressure side completely.
7.
Signs of wear on the hydraulics.
⇒
Have the components (impeller, suction port, pump housing) checked and replaced
by customer service.
8.
Pipe system on the pressure side or pressure hose clogged.
⇒
Remove clogging and replace the damaged components if necessary.
9.
Strongly gassing fluid.
⇒
Contact customer service.
10. The connection only has two phases.
⇒
Have the connection checked and corrected by a qualified electrician.
11. Excessive decrease in the fill level during operation.
⇒
Check supply/capacity of the system.
⇒
Have the switching points of the level control checked and adjusted if necessary.
Fault: The pump does not run smoothly and is noisy
1.
Improper duty point.
⇒
Check the pump configuration and the duty point, contact customer service.
2.
Hydraulics jammed.
⇒
Clean the hydraulics.
3.
Strongly gassing fluid.
⇒
Contact customer service.
4.
There are only two phases at the connection.
⇒
Have the connection checked and corrected by a qualified electrician.
5.
Incorrect direction of rotation.
⇒
Have the connection corrected by a qualified electrician.
6.
Signs of wear on the hydraulics.
⇒
Have the components (impeller, suction port, pump housing) checked and replaced
by customer service.
7.
Motor bearings have worn.
⇒
Inform customer service; send the pump back to the factory for overhauling.
8.
Pump is installed under tension.
⇒
Check installation, install rubber compensators if necessary.
Fault: Sealing chamber control reports fault or switches the pump off
1.
Condensation water build-up due to extended storage or high temperature fluctu-
ations.
⇒
Operate the pump for a short period (max. 5 min.) without pencil electrode.
2.
Increased leakage when running in new mechanical seals.
⇒
Change the oil.
3.
Pencil electrode cable is defective.
⇒
Replace the pencil electrode.
4.
Mechanical seal is defective.
⇒
Inform customer service.
