Spektrum FC6250HX Manual page 14

EN
Troubleshooting Guide
Problem
Throttle not at idle and/or
throttle trim is too high
Transmitter is not in normal
Helicopter will mode or throttle hold is on
not respond to
Motor is not connected to the
the throttle but
ESC or the motor wires are
responds to
damaged
other controls
Flight battery charge is
too low
Throttle channel is reversed
Flight battery has low voltage Fully charge the fl ight battery
Flight battery is old or damaged Replace the fl ight battery
Flight battery cells are unbal-
Helicopter power anced
is lacking
Excessive current is being
drawn through the BEC
Tail drive belt tension is not
correct
Main rotor head is not spin-
ning in the correct direction
Transmitter settings are not
Helicopter will
correct
not lift off
Flight battery has low voltage Fully charge the fl ight battery
Main rotor blades are in-
stalled backwards
Rudder control and/or sensor
direction reversed
Tail servo is damaged
Helicopter tail
spins out of
Inadequate control arm throw Check the rudder control arm for adequate
control
Tail belt is too loose
Cyclic gain is too high
Helicopter
wobbles in fl ight
Headspeed is too low
Dampers are worn
14
Possible Cause Solution
Lower the throttle stick and lower the
throttle trim
Verify the transmitter is in normal mode and
throttle hold is off
Connect the motor wires to the ESC and
check motor wires for damage
Replace or recharge fl ight battery
Reverse the throttle channel on the transmitter
Fully charge the fl ight battery, allowing the
charger time to balance the cells
Check all servos and the helicopter motor
for damage
See "Tail Belt Tension" section in this manual
Make sure the main rotor head is spinning
clockwise. Refer to the motor control test
Check throttle and pitch curve settings and
pitch control direction
Install the main rotor blades with the thicker
side as the leading edge
Make sure the rudder control and the rudder
sensor are operating in the correct direction
Check the rudder servo for damage and
replace if necessary
travel and adjust if necessary
Make sure the tail drive belt tension is
adjusted correctly
Tuning options using forward programming
are available under the "Advanced Settings"
section in this manual
Increase the helicopter's head speed via
your transmitter settings and/or using a
freshly charged fl ight pack
Replace the main rotor head dampers