G) Faulty Radio Link During Flight Operation; H) Emergency Landing Function; I) Low Voltage Monitoring - Reely 450 Bedienungsanleitung

g) Faulty radio link during flight operation

You want to take off and the engines are already switched on or during flight operation. The red and the green LEDs
flash slowly at the same time and indicate a faulty radio link.
Possible causes: Receiver crystal has fallen out of the base, receiver crystal is faulty, receiver antenna has broken
off. Transmitter antenna not pulled out, second transmitter with the same transmitter channel switched on/ batteries
from transmitter empty. Check the possible cause and restart once more.
Should there be permanent radio interference during flight, the quadrotor helicopter will start an emergency landing
and the LEDs will also indicate a faulty radio link here through simultaneous flashing.

h) Emergency landing function

During operation, a permanent radio interference prevails. The quadrotor helicopter starts an emergency landing
independently. The red and green LEDs flash slowly and simultaneously. Look for possible error causes on the basis
of the previously illustrated examples.

i) Low voltage monitoring

The battery voltage is permanently monitored. If a certain battery voltage is exceeded (threshold approx. 9.2 V), the
red LED starts to flash quickly. The green LED is permanently lit. This indicator can only be reset by disconnecting the
flight battery. If the red LED flashes, you should carry out a landing as quickly as possible and adjust the flight opera-
tion.
Should the quadrotor helicopter be connected to a non-fully charged battery, this can also lead to
undervoltage detection. In this case, fully charge the flight battery first of all and then try the take-off once
again.
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