EN
15
Troubleshooting Guide
Problem
Possible Cause
Solution
Helicopter
power is
lacking
Flight battery has low
voltage
Fully charge the flight battery
Flight battery is old or
damaged
Replace the flight battery
Flight battery cells are
unbalanced
Fully charge the flight battery, allowing
the charger time to balance the cells
Excessive current is being
drawn through the BEC
Check all servos and the helicopter
motor for damage
Tail drive belt tension is
not correct
See “Tail Belt Tension” section in this
manual
Helicopter will
not lift off
Main rotor head is not
spinning in the correct
direction
Make sure the main rotor head is
spinning clockwise. Refer to the motor
control test
Transmitter settings are
not correct
Check throttle and pitch curve settings
and pitch control direction
Flight battery has low
voltage
Fully charge the flight battery
Main rotor blades are
installed backwards
Install the main rotor blades with the
thicker side as the leading edge
Helicopter tail
spins out of
control
Rudder control and/or
sensor direction reversed
Make sure the rudder control and the
rudder sensor are operating in the
correct direction
Tail servo is damaged
Check the rudder servo for damage and
replace if necessary
Inadequate control arm
throw
Check the rudder control arm for ad-
equate travel and adjust if necessary
Tail belt is too loose
Make sure the tail drive belt tension is
adjusted correctly
Helicopter
wobbles in
flight
Cyclic gain is too high
Tuning options using forward program-
ming are available under the “Advanced
Settings” section in this manual
Headspeed is too low
Increase the helicopter’s head speed via
your transmitter settings and/or using a
freshly charged flight pack
Dampers are worn
Replace the main rotor head dampers
