25
Should you encounter any abnormal situations with your Piraña, refer to the matrix below to determine the probable
cause and a recommended solution for the action.
Flight battery not fully charged
DISCREPANCY
PROBABLE CAUSE
RECOMMENDED SOLUTION
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 transmitter’s programming.
Throttle channel is reversed
Reverse throttle channel in transmitter programming
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.
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
Replace damaged components - DO NOT ATTEMPT REPAIR
Balance or replace the propeller
Tighten propeller nut with appropriate-sized wrench
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 memo
configuration, incorrect Aura transmitter settings
ry, incorrect Aura data input
Consult radio manual for proper binding and model selection instructions
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
Controls reversed
FT Aura 5 LITE or transmitter settings incorrect
Refer to control surface direction chart and transmitter setup; adjust appropriate
settings as required. Check Piraña and Aura wiki web pages for additional
information. Contact customer support at
Control surface oscillation
Reduce airspeed
Propeller/spinner not balanced
Balance or replace propeller
Motor vibration
Inspect motor mounting bolts and re-tighten as necessary
Loose FT Aura 5 Lite mounting
Re-align and secure the FT Aura 5 Lite 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
Transmitter sub-trim is not properly zeroed
Remove sub-trim; adjust the servo arm or clevis to achieve proper geometry
Damaged propeller
Replace damaged component- DO NOT ATTEMPT REPAIR
Refer to FT Aura 5 Lite manual to decrease desired control suface gain
Damaged Servo
Replace Servo - DO NOT ATTEMPT REPAIR
Failed control direction test Incorrect Aura 5 or Transmitter Setting -
DO NOT FLY!
Reference transmitter and receiver sections of this manual. If no solution found,
contact customer support at
Improperly set master gain
Ensure master gain is set for proper gain value
aircraft underpowered
Transmitter is not properly calibrated (aileron/
elevator/rudder are not neutral with sticks
centered; reference transmitter monitor
Calibrate transmitter (reference manufacturer’s instructions, or return to
manufacturer for calibration
AIRCRAFT TROUBLESHOOTING GUIDE
If the required solution does not rectify the problem, please contact product support for further assistance.
Damaged propeller, collet,or motor
Propeller is not balanced
Propeller nut is loose
Excessive propeller noise
and/or vibration
Install propeller so that convex side faces forward
Motor nonresponsive (no ESC
initialization tones audible).
Refer to FT Aura 5 Lite manual to correctly configure transmitter
Needs additional time to arm.
Rest airplane on a flat surface and be sure to not move it for 8 seconds.
Series of tones are heard
from the motor
Throttle is slightly open when battery plugged in
causing the ESC to go into programming mode.
Make sure the throttle stick and throttle trim are all the way down.
Trims not set properly
Keep aileron, elevator, and rudder trims centered, and throttle trim fully
lowered. Use Quick Trim as needed. (See page 22)
Launch assist not engaging