Flex QQ Extra 300, Instruction Manual

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Ensure battery packs are adequately warm (70°F/21°C) before flight
Install propeller so that the convex side faces forward (tractor configuration)
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DISCREPANCY PROBABLE CAUSE RECOMMENDED SOLUTION
Motor nonresponsive (ESC
intialization tones audible)
Throttle not at idle and/or throttle trim too high
Lower throttle stick and trim completely. If problem persists, ensure that the sub-
trim and travel adjust are properly set in the radio’s programming.
Throttle channel is reversed Reverse throttle channel in radio programming
Motor nonresponsive (no ESC
initialization tones audible)
Motor disconnected from ESC
Ensure plugs are fully seated. Check battery and/or plugs for damage and replace
any damaged components found - DO NOT ATTEMPT REPAIR
Motor turns in the wrong
direction
The three motor wires are connected incorrectly
to the ESC
Swap any TWO motor wires.
aircraft underpowered
Flight battery not fully charged Ensure battery is fully charged prior to installing in aircraft
Propeller installed backwards
Flight battery damaged
Ambient temperature is too cold
Battery capacity too small for intended use
Replace battery with one of proper capacity and discharge capacity (C rating)
Battery is too weak or damaged Check battery’s physical condition, check battery voltages after charge
Battery’s discharge rating may be too small Replace battery with one with higher ‘C’ rating
Excessive propeller noise
and/or vibration
Damaged spinner and/or propeller, collet, or motor Replace damaged components - DO NOT ATTEMPT REPAIR
Propeller is not balanced
Balance or replace the propeller
Prop nut is loose Tighten prop nut with appropriate-sized wrench
Spinner is not fully in place or tightened Loosen the spinner bolt, adjust as required, retighten spinner bolt
Control surfaces
nonresponsive
Airframe or control linkage system damage
Examine airframe for damage, repair as required; inspect control linkage system
(servo, pushrod, control horn) for damaged components and replace as required
Wire damaged or connector loose Examine wires and conntections, replace as neccesary
Transmitter bound incorrectly, incorrect active
model memory, incorrect Aura data input
configuration, incorrect Aura transmitter settings
Consult radio manual for proper binding and model selection instructions
AIRCRAFT TROUBLESHOOTING GUIDE
Should you encounter any abnormal situations with your QQ Extra 300, refer to the matrix below to determine probable cause and a
recommended solution for the action.
If the required solution does not rectify the problem, please contact product support for further assistance.
Refer to the product web page and www.flexinnovations.com/aura for the latest information and downloads.
NOTICE
Unless specifically required, ALWAYS troubleshoot the airplane with the propeller removed.
Battery voltage too low Use volt meter to check battery; recharge or replace as necessary
Battery disconnected from ESC Check that the EC3 plugs are fully seated
BEC (battery elimination circuit) damaged Replace ESC- DO NOT ATTEMPT REPAIR
Failed control direction test Incorrect Aura 8 setting- DO NOT FLY! Refer to Aura 8 manual/website to correct the direction of gain correction
Controls reversed Aura 8 or transmitter settings incorrect Refer to control surface direction chart and adjust appropriate settings as required
Control surface oscillation
Reduce airspeed
Propeller/spinner not balanced Balance or replace propeller and/or spinner
Motor vibration Inspect motor mounting bolts and re-tighten as necessary
Loose Aura 8 mounting Re-align and secure the Aura 8 to the aircraft
Control linkage slop Examine control system and repair or replace work components
Improper transmitter setup
Trim changes between
Trims are not properly zeroed Readjust control linkage and re-center trims in radio
Sub-trim is not properly zeroed Remove sub-trim; adjust the servo arm or clevis to achieve proper geometry
Damaged propeller or spinner Replace damaged component- DO NOT ATTEMPT REPAIR
Refer to Aura 8 manual to decrease desired control surface gain