Wilo Rexa CUT, Installation And Operating Instructions Manual

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54 WILO SE 11-2014 V05 DIN A4
English TROUBLESHOOTING AND POSSIBLE SOLUTIONS
• In the event of frequent clogging, contact
Wilo customer service to have the macerator
replaced
7. The fluid is too dense
• Contact the manufacturer
Fault: Pump is running but not pumping
1. No fluid available
• Open inlet for tank or slide valve
2. Intake blocked
• Clean the supply line, slide valve, suction piece,
suction port or suction strainer
3. Macerator blocked
• Switch off the pump, secure it against being
switched back on again, clean the macerator
and correct the cutting gap if necessary
• In the event of frequent clogging, contact
Wilo customer service to have the macerator
replaced
4. Faulty hose/piping
• Replace defective parts
5. Intermittent operation
• Check switching system
Fault: The pump runs, but not within the speci-
fied operating parameters
1. Intake blocked
• Clean the supply line, slide valve, suction piece,
suction port or suction strainer
2. Slide valve in the pressure pipe shut
• Fully open the slide valve
3. Macerator blocked
• Switch off the pump, secure it against being
switched back on again, clean the macerator
and correct the cutting gap if necessary
• In the event of frequent clogging, contact
Wilo customer service to have the macerator
replaced
4. Incorrect direction of rotation
• Replace two phases on the mains supply
5. Air in the system
• Check the pipelines, pressure shroud and/or
hydraulics, and vent if necessary
6. Pump pumping against excessive pressure
• Check the slide valve in the pressure pipe and
open it completely if necessary, use a different
impeller, consult the plant
7. Signs of wear
• Replace worn parts
8. Faulty hose/piping
• Replace defective parts
9. Inadmissible levels of gas in the fluid
• Contact the manufacturer
10. Two-phase operation
• Have a specialist inspect the connection and
correct it as necessary
11. Excessive decrease in the water table during
operation
• Check the supply and capacity of the system,
and inspect the level control settings and
functionality
Fault: The pump does not run smoothly and is
noisy
1. Pump is operating in an inadmissible range
• Check the operational data of the pump and
correct if necessary and/or adjust the operating
conditions
2. Suction port, suction strainer and/or impeller
clogged
• Clean the suction port, suction strainer and/or
impeller
3. Macerator blocked
• Switch off the pump, secure it against being
switched back on again, clean the macerator
and correct the cutting gap if necessary
• In the event of frequent clogging, contact
Wilo customer service to have the macerator
replaced
4. Inadmissible levels of gas in the fluid
• Contact the manufacturer
5. Two-phase operation
• Have a specialist inspect the connection and
correct it as necessary
6. Incorrect direction of rotation
• Replace two phases on the mains supply
7. Signs of wear
• Replace worn parts
8. Defective motor bearing
• Contact the manufacturer
9. Pump is installed under tension
• Check installation, use expansion joints if
necessary
Fault: Mechanical seal leaks, sealing chamber
control reports a fault or switches the pump off
1. Condensation build-up due to extended storage
and/or temperature fluctuations
• Operate the pump briefly (max. 5 min.) without
pencil electrode
2. Increased leakage when running in new mechan-
ical shaft seals
• Change the oil
3. Defective pencil electrode cables
• Replace pencil electrode
4. Mechanical shaft seal is defective
• Replace the mechanical shaft seal and contact
the manufacturer!
Further steps for troubleshooting
If the points listed here do not rectify the fault,
contact Wilo customer service. They can help you
as follows:
• Telephone and/or written support from Wilo
customer service
• On-site support from Wilo customer service
• Inspection or repair of the pump at the factory
Please note that you may be charged for some
services provided by our customer service. For
more details, please contact Wilo customer
service.