Operating Manual
RO-Control NAVY Series
No.8721
No.8722
No.8723
No.8724
Page
9
3. Protection against signal loss:
If no valid signal is registered by the receiver for a time of 0.1 sec. the controller switches the
motor off. The controller will not restart until valid input signals are detected again. We
recommend activating a Fail Safe function for the gas channel on the transmitter, which should
be set so that the engine is switched off.
The controllers are equipped with two LEDs, one red and one green.
1. When the throttle is pushed beyond the neutral range, the red LED lights up continuously and
the engine starts to rotate. The green LED also lights up as soon as the throttle lever is in full
throttle position.
2. During the programming process, acoustic signals are output via the motor; the red LED lights
up parallel to each tone.
3. The green LED flashes rapidly when the controller is overheated and the overtemperature
protection has been activated. The red LED flashes rapidly when the undervoltage protection
has been activated.
Problem
Possible cause Solution
After switching on,
no tones are
emitted and the
LEDs do not
light up.
No battery voltage is
detected by the controller
or the battery is conntected
with the wrong polarity.
Check the connection between controller
and battery, replace the connectors. If
the polarity is incorrect, disconnect the
controller from the battery immediately,
otherwise it will be destroyed.
After switching on
the motor does not
work, a warning
tone with a short
tone (B-) sounds
at an interval of 1
sec.
The input voltage is
too high or too low,
or the controller is too
hot (above 80°C)
Check the voltage level of the drive battery.
Check the controller temperature and the
water cooling, possibly use a larger
controller.
You pull the throttle
but the boat
reverses.
The motor runs upside
down, it is connected
incorrectly.
Replace any two connecting cables between
controller and motor.
The boat does not
reverse.
The correct mode
(forward and backward)
is not set. The controller
does not recognize the
neutral point.
Check the driving mode and set it to
"forward and reverse".
Calibrate the throttle / throttle control stick
according to these instructions.
The motor stops
during operation.
The undervoltage drop
is triggered or the over-
temperature protection has
taken effect.
Insert a fully charged battery. The controller
temperature is too high, let the controller
cool down.
06. LED Indications
07. Problem solutions
Motor does not start
normally, abnormal
running behaviour
of the motor.
One or more connections
between controller and
motor are faulty. The
motor is defective.
Please check all connections. Test the
functions with another ESC or motor
with very low gas setting, otherwise the
controller could be destroyed.
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