Wilo Rexa CUT GI-Serie Einbau- Und Betriebsanleitung Seite 113

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 distribu-
tion 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 distribu-
tion network.
5. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified elec-
trician.
6. Increased power consumption through jammed hydraul-
ics.
⇒ 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 com-
ponents 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.
⇒ Open all gate valves completely.
3. Hydraulics jammed.
⇒ Clean the hydraulics.
4. Incorrect direction of rotation.
Installation and operating instructions Wilo-Rexa CUT GI
Faults, causes and remedies
⇒ Have the connection corrected by a qualified elec-
trician.
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 com-
pletely.
⇒ Check the impeller shape, use other impeller shapes
if required. Contact customer service.
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 com-
ponents if necessary.
9. Strongly gassing fluid.
⇒ Contact customer service.
10.There are only two phases at the connection.
⇒ 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 elec-
trician.
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.
en
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