# Prearm: Throttle Below Failsafe (All of a sudden? Why?)

**URL:** <https://discuss.cubepilot.org/t/prearm-throttle-below-failsafe-all-of-a-sudden-why/7709>\
**Category:** HereLink\
**Created:** [3 November 2021 01:26 UTC](https://discuss.cubepilot.org/t/prearm-throttle-below-failsafe-all-of-a-sudden-why/7709 "2021-11-03T01:26:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![will\_hong](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/will_hong/32/3504_2.png) [@will\_hong](https://discuss.cubepilot.org/u/will_hong)\
**Post date:** [3 November 2021 01:26 UTC](https://discuss.cubepilot.org/t/prearm-throttle-below-failsafe-all-of-a-sudden-why/7709/1 "2021-11-03T01:26:08Z")

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Hello

I’ve been flying my copter without issues lately.  
But today when I took my copter outside to fly, I see this error which I did not get before.  
“Prearm: Throttle Below Failsafe”

Also I see that no RC signal coming.

My RC: Herelink / Firmware: v4.0.8  
FC: Pixhawk Orange Cube / Firmware: Arducopter v4.0.7

1. Is it something that I’m the only one experiencing this issue?
2. It worked fine lately. But suddenly it’s not working. I did not upgrade firmware nor change setting. But why is it not working?

I have Pre-BLVOS flight inspection from the Aviation Authority today.  
I’m in real chaos.  
Please help me here~!

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**Author:** ![Satish\_Chaudhary](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/satish_chaudhary/32/4605_2.png) [@Satish\_Chaudhary](https://discuss.cubepilot.org/u/Satish_Chaudhary)\
**Post date:** [4 November 2021 08:14 UTC](https://discuss.cubepilot.org/t/prearm-throttle-below-failsafe-all-of-a-sudden-why/7709/2 "2021-11-04T08:14:31Z")

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Faced by me too

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**Author:** ![Alvin](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/alvin/32/1000_2.png) [@Alvin](https://discuss.cubepilot.org/u/Alvin)\
**Post date:** [5 November 2021 03:11 UTC](https://discuss.cubepilot.org/t/prearm-throttle-below-failsafe-all-of-a-sudden-why/7709/3 "2021-11-05T03:11:00Z")

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Please try to recalibrate the hardware sticks and sbus in Herelink Settings App.