11
EN
AR7200BX Fine-tuning and Adjustment
Troubleshooting Guide
Problem
Possible Cause
Solution
Helicopter will not bind
to the transmitter
(during binding)
Low flight battery or transmitter battery voltage
Fully charge or replace the flight battery and/or transmitter batteries
AR7200BX is not in bind mode
Make sure the bind plug is connected to the AR7200BX BND/DAT port
Transmitter is not in bind mode
Power on the transmitter while holding the Trainer/Bind switch. Hold the Trainer/Bind switch
until binding is complete
Transmitter too close to the helicopter during binding
process
Power off the transmitter. Move the transmitter to a larger distance from the helicopter.
Disconnect and reconnect the flight battery to the helicopter and follow binding instructions
Helicopter will not link to
the transmitter
(after binding)
Helicopter is bound to a different model memory
(ModelMatch radios only)
Disconnect the flight battery. Select the correct model memory on the transmitter
Reconnect the flight battery
Flight battery/Transmitter battery charge is too low
Replace or recharge batteries
AR7200BX will not initialize
The helicopter was moved during initialization
Lay the helicopter on its side during initialization if windy
The transmitter is powered off
Power on the transmitter
Controls are not centered
Center elevator, aileron and rudder controls. Make sure the throttle is at idle
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
The transmitter is not in normal mode or throttle hold
is on
Make sure the transmitter is in normal mode and throttle hold is off
The 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 flight battery
Throttle channel is reversed
Reverse the throttle channel on the transmitter
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 "Checking Tail Drive Belt Tension" 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
Flight battery will not
charge
Input voltage to the charger is too low
Input voltage must be between 11.5–15V DC with a minimum 3A current
The battery balance tab is damaged
Make sure the balance tab wires are fully seated in the balance plug
The flight battery is overdischarged
If any cell voltage drops below 3V, the battery is damaged and must be replaced
The 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
The helicopter wobbles in
flight
Cyclic gain is too high
Decrease Dial 1 on the AR7200BX
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
Observed Behavior
Suggested Adjustment
Cyclic response too slow or too fast
Adjust the control behavior parameter in the AR7200BX to fit your flying style.
Control inputs feel delayed
Increase Dial 2 on the AR7200BX
The helicopter seems to overshoot control input and then return Decrease Dial 2 on the AR7200BX
The helicopter tail stops too abruptly
Decrease Dial 3 on the AR7200BX
The helicopter tail does not stop precisely
Increase Dial 3 on the AR7200BX
Increase the rudder gain in your transmitter
Adjust the rudder heading lock gain parameter in the AR7200BX
Make sure the tail drive belt tension is adjusted correctly
