19EUROCOPTERENMaintenance · TroubleshootingMaintenanceTo have fun with your model over a long period, occasional service work is required to get your model in goodcondition and to minimize wear.• Remove dirt or dust depending with compressed air or a soft brush after each use. For stubborn dirt, aharder brush or a toothbrush can be used.• To clean the body/fuselage no chemical cleaners such as thinners may used, as this damage the plasticof the body/fuselage. Normally a piece of soft cloth is ok, stubborn dirt can be removed with washing-upliquid.• Check the tightness of all screws and tighten if necessary.• Also check all connections, cables and power battery / rechargeable battery for damage.• WARNING: Damaged batteries or rechargeable batteries must not be used again and must bedisposed of immediately – fi re hazard! Please note the disposal notes at the end of this manual.• Check the model for worn, broken or jammed parts and gears and repair if necessary.• WARNING: remove the batteries / rechargeable batteries of the transmitter and model when not inuse – fire hazard!TroubleshootingProblem Possible Cause Corrective ActionTransmitter doesnot workNo batteries insertedPolarity of the batteries reversedPlace 6 x AA batteries into the transmitterCheck polarity of the inserted batteriesand correct if necessaryPOWER LED of thetransmitter fl ashesbatteries almost emptythe throttle lever is not in the lowest po-sitioninsert new batteriesMove the throttle lever downThe charging LEDon the transmit-ter goes off veryquicklytransmitter batteries almost empty insert new batteriesLED of the USBcharging cable ispermanently illumi-natedhelicopter fully charged Disconnect the charging cableEUROCOPTERdoes not workTransmitter does not workFlight battery is almost emptyBroken main rotorMain rotor blades mounted incorrectlyMotor defectiveSee chapter „transmitter does not work“Recharge fl ight battery according to theinstructionsCheck the main rotor bladesCheck main rotor blades and mounting itagain after instructionFirst check the transmitter and fl ightbattery, if necessary, replace motor