Perhaps, is the noise immediately generated after you plug in the cord?
In case of voice recognition available, it might be due to internal speaker noises.
If there was no specific impact to the air conditioner pipe or product, the noise is not due to discharged coolant(air conditioner gas).
In case of coolant leakage due to impacts, then all the coolants(air conditioner gas) will be discharged within several minutes and also the noises will be stopped.
It requires inspection by a professional service manager.
Try this
In case of coolant leakages due to impacts, remove the power cord and open the window for air ventilation.
Air conditioner coolant is not combustible or harmful to human bodies.
This guide was created for all models, so the images or content may be different from your product.