Operating instructionsW3G710-GO81-01Translation of the original operating instructions4.5 Checking connections; Ensure isolation from supply (all phases).; Make sure a restart is impossible; Check the cables for proper fit.4.6 Switching on the deviceThe device may only be switched on if it has been installed properly andin accordance with its intended use, including the required safetymechanisms and professional electrical hookup. This also applies fordevices which have already been equipped with plugs and terminals orsimilar connectors by the customer.WARNINGHot motor housingRisk of fire→ Ensure that no combustible or flammable materials arelocated close to the fan.; Before switching on, check the device for visible external damageand make sure the protective devices are functional.; Check the fan's air flow paths for foreign matter and remove anyforeign matter found.; Apply the nominal supply voltage.; Start the device by changing the input signal.4.7 Switching off the deviceSwitching off the device during operation:; Switch off the device via the control input.; Do not switch the motor (e.g. in cyclic operation) on and off via powersupply.Switching off the device for maintenance:; Switch off the device via the control input.; Do not switch the motor (e.g. in cyclic operation) on and off via powersupply.; Disconnect the device from the power supply.; When disconnecting, be sure to disconnect the ground connection last.5. INTEGRATED PROTECTIVE FEATURESThe integrated protective functions cause the motor to switch offautomatically in the event of the faults described in the table.Fault Safety feature description/functionRotor position detection error An automatic restart follows.Blocked rotor ; After the blockage isremoved, the motor restartsautomatically.Line undervoltage (line voltageoutside of permitted nominalvoltage range); If the line voltage returns topermitted values, the motorrestarts automatically.Phase failure A phase of the supply voltagefails for at least 5 s.; When all phases arecorrectly supplied again, themotor automatically restarts after10-40 s.6. MAINTENANCE, MALFUNCTIONS, POSSIBLECAUSES AND REMEDIESDo not perform any repairs on your device. Send the device to ebm-papst for repair or replacement.WARNINGLive terminals and connections even with deviceswitched offElectric shock→ Wait five minutes after disconnecting the voltage at all polesbefore opening the device.CAUTIONIf control voltage or a stored speed set value is applied,the motor will restart automatically, e.g. after a powerfailure.Risk of injury→ Keep out of the device danger zone.→ When working on the device, switch off the line voltageand ensure that it cannot be switched back on.→ After working on the device, remove any tools or otherobjects from the device.If the device is out of use for some time, e.g. when in storage,we recommend switching it on for at least two hours to allowany condensation to evaporate and to move the bearings.Malfunction/fault Possible cause Possible remedyImpeller notrunning smoothlyImbalance in rotatingpartsClean the device;replace it if imbalancepersists after cleaning.Make sure noweight clips areremoved duringcleaning.Motor not turning Mechanical blockage Switch off, isolatefrom supply andremove mechanicalblockage.Item no. 50348-5-9970 · ENU · Change 89187 · Approved 2016-04-15 · Page 10 / 12ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · info1@de.ebmpapst.com · www.ebmpapst.com