FMS Fox Operating Instructions Manual page 58

„10" = Behaviour in case of undervoltage
Select how the flight controller is to react if undervoltage recognition is activated (see menu item „3").
Select „Power reduction" to reduce motor power when the undervoltage limit is reached. Select „Motor deactivation"
to deactivate the motor completely when the undervoltage limit is reached.
With the setting „Power reduction", the motor continues to run and discharge the rechargeable battery. To
avoid harmful deep discharge of the battery at the setting „Power reduction", the motor should be switched
off as quickly as possible and landing initiated.
We also recommend setting the undervoltage recognition for LiPo batteries to 3.2 V/cell in the „Power
reduction" setting.
Warning messages:
If the flight controller isn't working, this may have several causes. The flight controller will issue warning signals in
such cases.
1. If continuous sounds are heard (*****), the operating lever for the speed control is not in the bottom position
(motor off).
2. If sounds with a break of one second are audible continually (*
flight battery is in an undefined condition. Check the charge condition of the flight battery.
3. If sounds with a shorter pause are audible continually (* * * * *), the flight controller cannot recognised the
transmitter for speed adjustment correctly. In this case, observe chapter 14. a).
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* * *), the battery voltage of the connected