Spektrum FC6250HX Manual

EN
14
Troubleshooting Guide
Problem Possible Cause Solution
Helicopter will
not respond to
the throttle but
responds to
other controls
Throttle not at idle and/or
throttle trim is too high
Lower the throttle stick and lower the
throttle trim
Transmitter is not in normal
mode or throttle hold is on
Verify the transmitter is in normal mode and
throttle hold is off
Motor is not connected to the
ESC or the motor wires are
damaged
Connect the motor wires to the ESC and
check motor wires for damage
Flight battery charge is
too low
Replace or recharge  ight battery
Throttle channel is reversed Reverse the throttle channel on the transmitter
Helicopter power
is lacking
Flight battery has low voltage Fully charge the  ight battery
Flight battery is old or damaged Replace the  ight battery
Flight battery cells are unbal-
anced
Fully charge the  ight 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 spin-
ning 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  ight battery
Main rotor blades are in-
stalled 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 adequate
travel and adjust if necessary
Tail belt is too loose
Make sure the tail drive belt tension is
adjusted correctly
Helicopter
wobbles in  ight
Cyclic gain is too high
Tuning options using forward programming
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  ight pack
Dampers are worn Replace the main rotor head dampers