Wilo-TOP-S, TOP-Z - Wilo Canada Inc.

ENGLISHProblem Causes RemedyPump is connected Motor is blocked, e.g. Check and if necessary rectify that the rotorbut fails to run. by deposits from the shaft still rotates freely.The green indicator system fluid.light is on.(Fig.5/6, Pos.2)Pump with equipped vent plug:xRemove the vent plug,xinsert a flat head screwdriver into the slot endof the shaft and turn to ensure free rotation,xreplace the vent plug.Pump without equipped vent plug:xDisassemble the motor head and check;unblock by turning the impeller if necessary.If the blockage cannot be removed,contact Customer Services.Pump output too There is foreign Disassemble the pump head and removelow. material inside foreign material.The green indicator the pump housinglight is on.or impeller.(Fig.5/6, Pos.2) Wrong pumping Exchange the pump suction and discharge sides.direction.Observe the arrow indicating direction on thepump housing.Shut-off valves are Open the shut-off valves fully.not fully open.Three-phase pumps Correct the electrical connection in theonly:terminal box:Wrong direction ofxInterchange two phases on the mains terminal.rotation.The red LED is on.(Fig.5, Pos.3)Noise in the system. Air in the system. Vent the system.The green indicator The pump flow is too Decrease the pump output by switching to alight is on. high. lower speed.(Fig.5/6, Pos.2)The pump head is too Check speed setting, if necessary switch to ahigh.lower speed.Noise in the pump. Air in the pump. Vent the pump / unit (see chapter 8.1)The green indicator Cavitations due to Increase system pressure within the permissiblelight is on. insufficient inlet range.(Fig.5/6, Pos.2) pressure.There is foreign Disassemble the pump head and remove thematerial inside the foreign material.pump housing orimpeller.Shut-off valves are Open the shut-off valves fully.not fully open.If the fault cannot be remedied, please contact your local heating specialist or WILO customerservices.11