Mitsubishi Electric · Air Conditioning
A beep tone is heard from the indoor unit when it successfully receives a signal from the remote controller and begins or changes its operation.
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Listen for the beep to confirm the remote control is communicating with the unit.
If no beep is heard, check the remote control's batteries and try again.
Ensure you are within the signal range of the indoor unit (approx. 20 feet / 6 meters).