Wilo-Star-Z NOVA

Maintenance/faultsCleaningReplacing the motor headClean the outside of the pump with a slightlydamp cloth only. Do not use detergents.Warning: When removing the motor heador pump, hot fluid may spurt out under highpressure. Allow the pump to cool down beforehand.Close the stop valves before removing the pump Page 26.Replacing the motor head Page 26.6 Maintenance/faultsOrder the service motor from a specialist retailer.Faults Causes RemediesPump does notstart.Pump is makingnoises.7Interruption in the powersupply, short- circuit ordefective fuses.Time switching functionhas switched off automatically(Star-Z NOVA Cversion only).Motor is blocked, e.g. bydeposits from the watermains.Motor scraping, e.g.through deposits fromthe water mainsRunning dry, too littlewater.Have the power supplychecked by a qualifiedelectrician.Check the plug clocktimer setting.Have the pump removedby a qualified technician Page 26.Check that the impellercan move by turning itand rinse out the dirt thathas accumulated.Check the check valves,they must be fully open.EnglishNote: If you cannot remedy the fault,contact a specialist retailer.Installation and operating instructions Wilo-Star-Z NOVA 33