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9. troubleshootINg
Problem Remedial measures
RC system does not function. Check whether the system is switched on.
Check the state of charge of the batteries / rechargeable batteries of the
receiver.
Check the polarity of the batteries / rechargeable batteries.
Check the contacts and plug connections of the receiver batteries/rechargeable
batteries.
The transmitter switches off on its own
immediately or after a short while
Check the state of charge of the batteries / rechargeable batteries of the
transmitter.
After making the switch-on, an alarm
signal sounds from the speed controller,
and the motor does not start up.
Input voltage faulty, check rechargeable drive battery
After making the switch-on, the red LED
for the speed controller lights up and
stays on,
and the motor does not start up.
Acceleration/brake signal faulty. Check the connection between the receiver and
the speed controller.
The system has a low range Check the state of charge of the batteries / rechargeable batteries of the
transmitter and the receiver, charge or replace if necessary.
Check the link of the receiver / transmitter
The RC unit functions in a faulty man-
ner.
Interference pulses
Plug for the receiver battery is loose.
Receiver damaged, for example after a crash
One or more electric/electronic components have come into contact with
moisture.
Check the link of the receiver / transmitter
Servo/speed controller does not
respond.
Check whether the system is switched on.
Check the state of charge of the batteries / rechargeable batteries of the
receiver.
Check the polarity of the servo connector.
The servos shake. Check the state of charge of the batteries / rechargeable batteries of the
receiver.
Check for any dampness in the receiver and if necessary, carefully dry with a hot-
air blower.
A servo hums. Check the state of charge of the batteries / rechargeable batteries of the
receiver.
Check that the linkage rods are running smoothly.
Uninstall the servo and test the functioning.
Servos do not respond properly. Transmitter and/or receiver battery/rechargeable batteries are weak.
Gear wheels in the servo gear unit do not take hold or are defective.
Adjusting rings on the link levers are loose.
Reverse switch on the transmitter has been inadvertently switched to "REV".
The model does not respond. Check the charging level of the rechargeable drive battery und rechargeable
battery for the transmitter.
The electric circuit is interrupted.
The motor is not working.
The driving gear wheel jams.
The motor does not start up even though
the servo responds.
The motor is not working.
The motor cable is loose.
The motor gets too hot.
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