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AIRCRAFT TROUBLESHOOTING GUIDE

Should you encounter any abnormal situations with your FlexJet, 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.

 

NOTICE

Unless specifically required, ALWAYS troubleshoot the airplane with the motor disengaged by unplugging all 

three motor leads from the ESC.

DISCREPANCY

PROBABLE CAUSE

RECOMMENDED SOLUTION

 

Motor nonresponsive 

(ESC initialization tones 

audible)

Throttle not at idle and/or throttle trim too high

Throttle channel is reversed

Motor nonresponsive (No 

ESC initialization tones 

audible)

Motor disconnected from ESC

Motor turns in the wrong 

direction

The three motor wires are connected 

incorrectly to the ESC

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.

Reverse throttle channel in radio programming.

Ensure plugs are fully seated. Check battery and/or plugs for damage and 

replace any damaged components found. DO NOT ATTEMPT TO REPAIR.

Swap any TWO motor wires.

Reduced flight time or 

aircraft under powered

Flight battery not fully charged

 

 

Excessive fan noise 

and/or vibration

Control surface(s) 

non-responsive

Ensure battery is fully charged prior to installing in aircraft.

Failed control direction test

Control surface oscillation

Trim changes between 

flight modes

25

 

 

Flight battery is weak or damaged

 

 

Remove battery from service and replace with a different battery.

 

 

Ambient temperature is too cold

Ensure battery packs are adequately warm (70°F/21°C) before flight.

 

 

Battery capacity too small for intended use

Replace battery with one of proper capacity and discharge capacity (C 

rating).

 

ESC reaching preset LVC (low-voltage cutoff)

Recharge battery, or reduce flight time.

Battery's discharge rating too low

Replace battery with one of a higher discharge rating.

Damaged EDF Housing, rotor cone, fan rotor, 

prop adapter or motor

Replace damaged components. DO NOT ATTEMPT REPAIR.

Fan rotor is not balanced

Balance or replace the fan.

Fan nut is loose

Balance or replace the adapter.

Spinner is not fully in place or tightened

Loosen the spinner bolt, adjust as required and retighten bolt.

Rotor cone or fan adapter threads not cut 

straight

Replace rotor cone or fan adapter. DO NOT ATTEMPT REPAIR.

Airframe or control linkage system damaged

Replace damaged control system components. DO NOT ATTEMPT 

REPAIR.

Transmitter model bound incorrectly, incorrect 

active model memory, incorrect Aura data 

input configuration, incorrect transmitter 

settings

Consult radio manual for proper binding and model selection instructions.

Battery voltage too low

Use volt meter to check battery. Replace or recharge as necessary.

Battery disconnected from ESC

Verify that battery is connected, and that the EC5 plugs are fully seated.

Battery Eliminator Circuit (BEC) damaged

Replace ESC. DO NOT ATTEMPT REPAIR.

Damaged servo

Replace servo. DO NOT ATTEMPT REPAIR.

Incorrect transmitter or Aura 8 setting. 

DO NOT FLY!

Reference transmitter and receiver sections of this manual. If no solution is 

found, contact customer support at 

[email protected].

Exceeding maximum airspeed for configuration

Reduce airspeed.

Fan rotor / rotor cone not balanced

Balance or replace fan rotor / rotor cone.

Motor vibration

Inspect motor and motor mounting. Tighten screws as needed or replace 

motor.

Loose Aura 8 Mounting

Realign and secure the Aura 8 to the aircraft.

Excessive control linkage slop or play

Inspect control linkage system and replace components as necessary.

Improper transmitter setup

Refer to the transmitter configuration guide in this manual to properly 

configure transmitter settings.

Damaged rotor cone and/or fan

Replace rotor cone and rotor fan as needed. DO NOT ATTEMPT REPAIR.

Improperly set master gain

Ensure master gain is set for proper gain value(s).

Trims are not properly zeroed

Use Aura "Quick Trim" feature, or mechanically trim the model and reset 

transmsitter trim to zero.

Sub-trims are not properly zeroed

Use Aura "Quick Trim" feature, or mechanically trim the model and reset 

transmsitter sub-trim to zero.

Transmitter is out of calibration (aileron/elevator/

rudder are not at neutral with sticks centered; 

reference transmitter monitor screen)

Calibrate transmitter (reference transmitter's instruction manual) or return 

transmitter to manufacturer for calibration.

PWM Receiver Connection 

type, and cannot get 

green LED on 

Aura, and no control of 

model

Any of the four PWM cables not connected

Connect all four male to male servo cables between your receiver and 

Aura.

Any of four PWM cables connected to incorrect 

ports

Connect all cables to the proper ports. Reference the diagram on the PWM 

receiver connections page of this manual.

Polarity of any PWM cables incorrect

Reconnect servo cables with the proper polarity.

Receiver not bound and/or outputting PWM 

servo pulses

Bind receiver per manufacturer's instructions and verify with a servo to 

ensure PWM signal is output from each channel as required.

Fan adapter is not balanced

Tighten fan nut with properly sized wrench.

Summary of Contents for SUPER PNP

Page 1: ......

Page 2: ...LEASE VISIT OUR WIKI SUPPORT SITE FOR THE LATEST PRODUCT UPDATES FEATURE CHANGES MANUAL ADDENDUMS AND FIRMWARE CHANGES FOR BOTH YOUR FLEXJET AND THE INSTALLED AURA 8 ADVANCED FLIGHT CONTROL SYSTEM htt...

Page 3: ...in wings and stabilizer Custom designed control horns to op mize control geometry and performance High precision digital servos with metal gears Lightweight EPO foam is s and tough Introduction Box Co...

Page 4: ...0T SPM9645 FPZA1012 Potenza 3pc Male Male Servo Connectors Potenza 6S 5200mAh 40C Li Po Potenza 6S 4200mAh 40C Li Po Potenza C 80 80W Multi Chemistry Charger Hobbywing ESC Programming Card Potenza Dig...

Page 5: ...cal ability Failure to operate this product in a safe and responsible manner could result in injury or damage to the product or other property 3 This model must be assembled according to these instruc...

Page 6: ...ur transmitter You may need to reassign CH6 Aux 1 to a 3 position switch The retracts in the FlexJet are operated via CH5 Gear in your transmitter You may need to reassign CH5 Gear to a 2 position swi...

Page 7: ......

Page 8: ...nnections must be connected AND connected in the proper polarity from receiver outputs to Aura inputs for Aura to activate servo outputs Aileron S1 Elevator S2 Rudder S3 Aux1 CH6 S4 Please note for op...

Page 9: ...al spool up Hold the aircraft securely when connecting the battery before flight Always ensure any and all objects are clear of the duct inlets and EDF fan unit as they may become entangled WARNING Al...

Page 10: ...h to the fuselage Remove the EDF access hatch and place the hatch and screws in a secure location to be used at a later step in the assembly process Remove the two M3x25 Phillips self tapping screws t...

Page 11: ...d pointing toward the bottom of the fuselage Cut out the elevator trim gauges located on the rear cover of the manual Align the center line of the elevator trim guage with the panel line just forward...

Page 12: ...ll amount of up elevator as indicated by the elevator trim gauge Once satisfied with the mechanical trim of the stabilizer use the included 2mm hex driver to secure the M2 x 6mm cap head self tapping...

Page 13: ...uselage with a M3x10 phillips head self tapping screw Avoid over tightening the screw and do NOT use blue thread locker on this connection Power on the radio system Check the aileron trim by comparing...

Page 14: ...ack masking tape to the inside of the fuselage covering the hole for the stabilizer tube Test fit the carbon fiber vertical stabilizer tube by inserting it into the hole of the fuselage until it is fl...

Page 15: ...ake vertical fin extremely difficult to remove In addition if the vertical stabilizer tube extends too far inside the fuselage it will interfere with the thrust tube Re install the vertical stabilizer...

Page 16: ...t use blue thread locker on this connection Slide the tail pipe until it is flush with the end of the exhaust nozzle Once satisfied with the finish secure the tail pipe to the EDF fan housing using th...

Page 17: ...per towel and Isopropyl alcohol wipe away any excess epoxy 1 2 16 Required Tools and Fasteners 5 min Epoxy or Medium CA MISSILE RAIL INSTALLATION Required Tools and Fasteners 5 min Epoxy or Medium CA...

Page 18: ...is pre configured rudder to aileron and rudder to elevator mixing programmed into the Aura If you see elevator or ailerons move with rudder stick input this function is intentional and completely NORM...

Page 19: ...ntact us via email at support flexinnovations com The flight control system activates with RF broadcast Perform these tests in Mode 3 higher gain for better visibility and then again in Mode 2 and any...

Page 20: ...4 5 6 7 8 Verify control surfaces are properly hinged and in good working order Pinch a control surface between your thumb and fore finger and stabilize the wing with your other hand Give the control...

Page 21: ...rvo Ports tab of the Aura Config Tool 3 digital non PWM receiver users can utilize the Quick Trim procedure below Please reference page 11 to adjust the flying stabilizers Pilots using a digital recei...

Page 22: ...t S2 Power the FlexJet by plugging a battery into the ESC The LEDs on the Aura will repeatedly double flash orange This confirms you have entered Quick Set mode The Green LED may be flashing or solid...

Page 23: ...controls are reversed DO NOT REVERSE CONTROLS IN THE TRANSMITTER OR THE AURA CONFIG TOOL Email us at support flexinnovations com for corrective action Please note that BOTH the Transmitter Control Dir...

Page 24: ...ase refer to Page 3 of this manual for a complete listing of available replacement parts NOTICE If a crash is imminent fully reduce the throttle to prevent further damage to the power system and reduc...

Page 25: ...crews that secure the EDF fan unit to the EDF mounting rails Using 1 Phillips screwdriver remove the M3x6 phillips machine screw that secures the rotor cone to the rotor Using an adjustable wrench rem...

Page 26: ...NOT ATTEMPT REPAIR Transmitter model bound incorrectly incorrect active model memory incorrect Aura data input configuration incorrect transmitter settings Consult radio manual for proper binding and...

Page 27: ...an 45 days after purchased date Damage due to acts of God accident misuse abuse negligence commercial use or due to improper use installation operation or maintenance Modification of or to any part of...

Page 28: ...lly demonstrated all maneuvers intended or anticipated prior to the specific event An inexperienced pilot is assisted by an experienced pilot Only personnel associated with flying the model aircraft a...

Page 29: ...ered trademark of Hitec RCD USA Inc Graupner HoTT is a registered trademark of Graupner Co Ltd Version 1 0 Created 12 2017 w w w f l e x i n n o v a t i o n s c o m Elevator Trim Gauges Stab Center Fr...

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