Spirit System

Sorry, I'm not sure what you mean. Shall I connect the ESC by using an Y-Cable to both, Receiver and Spirit GT Channel 1

No.
Open the software, then in General - Channels assign Throttle to Channel 1.
Save the settings.

This should resolve your problem.

Connected to CH1 is Pitch/Aileron servo.
Regarding "manual.spirit-system.com" the port AUX1 shall be used for BEC/ESC and AUX2 for second BEC line.
Is this correcht? Do you mean this?
Spirit GT with Graupner Hott receiver.

Unfortunately no, I dont meant this.

I only meant to do these steps:

1. Open the software
2. Go to General - Channels page
3. Assign Throttle to Channel 1.
4. Save the settings.

Nothing else is required, no wiring changes are needed. There is no relation to wiring. only channels.

OK, then the ESC line stays connected to Receiver?

Yes.

OK, I will try. Thank you

Hello,
Unfortunately, setting channel 1 to throttle didn't make a difference. I flew once yesterday, and the altitude limit was triggered again.
I'm attaching the flight log.

Hello,
I updated the Spirit GT today from version 3.7.2 to version 4.0.0. I set the recommended rotation speed and rudder delay values ​​​​from the update description.
I also reinstalled version 1.4.1 on the GeoLink v2, which took about 10 minutes, not 75 seconds.
After that, I flew twice without the altitude limit being triggered uncontrollably.
When the minimum altitude was exceeded, it was triggered as intended.
I don't know the reason now, but I hope it stays that way!