Troubleshooting Guide - Horizon Hobby UMX Aero Commander Instruction Manual

Troubleshooting Guide

AS3X
Problem
Control surfaces not at
neutral position when
transmitter controls are
at neutral
Model flies
inconsistently from
flight to flight
Controls oscillate in
flight, (model rapidly
jumps or moves)
Problem
Aircraft will not respond
to throttle but responds
to other controls
Extra propeller noise or
extra vibration
Reduced flight time or
aircraft underpowered
LED on receiver flashes
and aircraft will not bind
to transmitter (during
binding)
Possible Cause
Control surfaces may not have been
mechanically centered from factory
Aircraft was not kept immobile for 5
seconds after battery was plugged in
Aircraft was not kept immobile for 5
seconds after battery was plugged in
Trims are moved too far from neutral
position
Propeller, spinner or motor is unbalanced,
causing excessive vibration
Nut on prop shaft is too loose, causing
excessive vibration
Possible Cause
Throttle stick and/or throttle trim too high
Throttle channel is reversed
Motor disconnected from receiver
Propeller, spinner or motor is unbalanced,
causing excessive vibration
Prop screw is too loose
Flight battery charge is low
Propeller installed backwards
Flight battery damaged or old.
Flight conditions may be too cold
Battery capacity too low for flight conditions Replace battery or use a larger capacity
Transmitter too near aircraft during binding
process
Bind switch or button not held long enough
during bind process
Aircraft or transmitter is too close to large
metal object, wireless source or another
transmitter
Solution
Center control surfaces mechanically by
adjusting the U-bends on control linkages
Keep the aircraft immobile for 5 seconds after
plugging in the battery
Keep the aircraft immobile for 5 seconds after
plugging in the battery
Neutralize trims and mechanically adjust
linkages to center control surfaces
Balance parts or replace it if damaged
Tighten the prop shaft nut 1/2 turn
Solution
Reset controls with throttle stick and throttle
trim at lowest setting
Reverse throttle channel on transmitter
Open fuselage and make sure motor is
connected to the receiver
Balance parts or replace it if damaged
Tighten the prop screw
Completely recharge flight battery
Install propeller with numbers facing forward
Replace flight battery and follow flight battery
instructions
Make sure battery is warm before use
battery
Power off transmitter, move transmitter a
larger distance from aircraft, disconnect and
reconnect flight battery to aircraft and follow
binding instructions
Power off transmitter and repeat bind
process. Hold transmitter bind button or
switch until receiver is bound
Move aircraft and transmitter to another
location and attempt binding again
EN
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