en
Installation and operating instructions • Wilo-Rexa FIT-S • Ed.01/2022-03
21
3.
The sealing chamber control (optional) has interrupted the
electric circuit (connection-related)
⇒
See “Fault: Mechanical seal leakage, sealing chamber con-
trol 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 quali-
fied electrician. Contact the electricity distribution net-
work.
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 quali-
fied electrician. Contact the electricity distribution net-
work.
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.
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 hous-
ing) 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 hous-
ing) checked and replaced by customer service.
7.
Motor bearings have worn.
⇒
Inform customer service; send the pump back to the fact-
ory for overhauling.
8.
Pump is installed under tension.
⇒
Check installation, install rubber compensators if neces-
sary.
Fault: Sealing chamber control reports fault or switches the
pump off
1.
Condensation water build-up due to extended storage or high
temperature fluctuations.
⇒
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.
