8
EN
Troubleshooting Guide
Problem
Possible Cause
Solution
Helicopter will not bind
to the transmitter
(during binding)
Low fl ight battery or transmitter battery voltage
Fully charge or replace the fl ight battery and/or transmitter batteries
AR7210BX is not in bind mode
Make sure the bind plug is connected to the AR7210BX 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 fl ight 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 fl ight battery. Select the correct model memory on the transmitter
Reconnect the fl ight battery
Flight battery/Transmitter battery charge is too low
Replace or recharge batteries
AR7210BX 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 fl ight battery
Throttle channel is reversed
Reverse the throttle channel on the transmitter
Gyro Gain Adjustment
• If the tail wags or oscillates, lower the gain on the gyro.
On your transmitter’s gyro menu, decrease the gyro gain values a small amount
at a time until the helicopter is stable within a particular fl ight mode.
• If the tail is drifting while hovering, increase the gain on the gyro.
On your transmitter, increase the gyro gain values a small amount at a time until
the tail starts to wag/oscillate. Afterwards, reduce the gain until the tail stops
wagging/oscillating within a particular fl ight mode.
Post-Flight Inspections and Maintenance
Ball Links
Make sure the plastic ball link holds the control ball, but is not tight (binding) on the ball. When a link is too loose on the ball, it can separate from the ball
during fl ight and cause a crash. Replace worn ball links before they fail.
Cleaning
Make sure the battery is not connected before cleaning. Remove dust and debris with a soft brush or a dry lint free cloth.
Bearings
Replace bearings when they become notchy (sticky in places when turning) or draggy.
Wiring
Make sure wiring does not block moving parts. Replace damaged wiring and loose connectors.
Fasteners
Make sure there are no loose screws, other fasteners or connectors. Do not over tighten metal screws in plastic parts. Tighten screw so parts are mated
together, then turn screw only 1/8th of a turn more.
Rotors
Make sure there is no damage to rotor blades and other parts which move at high speed. Damage to these parts includes cracks, burrs, chips or scratches.
Replace damaged parts before fl ying.
Gyro
Make sure the AR7210BX is securely attached to the frame. Replace the double-sided tape when necessary. The helicopter will crash if the AR7210BX
separates from the helicopter frame.
Blade Helicopter Belt Tension
Belt tension that is too tight results in loss of power and causes the belt to wear more quickly. Tension that is too loose can cause belt damage and loss of tail rotor
control in fl ight.
To check for proper belt tension:
1. View the tail rotor drive belt through the opening at the back of the main
frame.
2. Use a hex wrench or standard screwdriver to compress the belt through the
opening.
3. Apply light pressure on the belt, compressing the belt toward the left side of
the tail boom.
4. The belt tension is correct if the compressed side of the belt reaches approxi-
mately halfway to the opposite side of the belt.
a. If the compressed side of the belt reaches farther than halfway to the
other side of the belt, the tension is too loose.
b. If the compressed side of the belt does not reach halfway to the other
side of the belt, the tension is too tight.
To adjust belt tension:
1. Loosen the two horizontal stabilizer screws.
2. Loosen the 2 screws at the
back of the main frame.
3. Slide the boom forward
or aft to adjust the belt
tension.
4. When the belt tension is
properly adjusted, tighten
the 2 screws at the back
of the frame.
5. Tighten the horizontal
stabilizer screws.
