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“Learn R/C”. Teach the ECU to the R/C System
Before the ECU can be used for the first time you must program the failsafe and learn the throttle stick and
optionally the auxiliary control positions of your R/C system.
To accomplish this, complete the following steps:
1. Connect one or both ECU servo cables to the receiver depending on either using single or two
channel operation. The “THR” cable connects to the throttle channel and if used, the “AUX” cable
must be connected to a channel capable of three (3) positions or a variable control. Make certain
that all other connections are made in accordance with the Electrical Connection Diagram.
Note: Even if you do not use the auxiliary channel for control, you can still plug the “AUX” cable
into an unused receiver channel for a redundant power signal connection. However, if this is done,
you must manually disable the auxiliary channel in the limits menu.
2. While pressing the Select Menu key on the GSU, switch on the receiver.
Note: Instead of the Select Menu key on the GSU, the small button switch on the LED I/O board
may be pressed instead. This key can also be used to advance through the learn R/C sequence
(described below). This feature is useful when the GSU is not available. Keep in mind that the
LED’s on the I/O board are the same as the GSU for Standby, Pump running and OK.
Release Select Menu only after the three LED’s display the following blink sequence:
LED Blink Sequence
Standby/Man. Yellow
Pump running Red
OK Green ....
The GSU screen will display:
3. This procedure enables a system mode, whereby the stick positions can be learned by the ECU.
When Select Menu is released, only the green OK LED should illuminate. If the pulse width
number is “:0 us” and the green OK LED is flashing rapidly, then there is a problem with the
receiver output. Test with a servo and ensure the transmitter / receiver are working correctly. To
test the connection, move the throttle stick and the pulse width number should change. If not, the
THR cable is not connected to the correct channel.
The GSU screen will display:
Throttle channel “Off” position
4. Now the ECU can memorize the positions of the throttle and AUX channels. First, place the throttle
stick and throttle trim to minimum. Next, press Select Menu or the LED I/O board button switch
again. This will store the R/C system’s pulse width for immediate shutdown of the turbine. The
green OK LED will turn off and the red Pump running LED will illuminate.
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