Split air conditioner with fan

Split air conditioner for sale with its remote and fan. The air conditioner unit itself emitted black smoke from underneath, so I turned it off immediately. The air conditioner is for sale with its fan. The fan is in good condition, nothing wrong with it, but I don't know what's wrong with the unit since it emitted black smoke and I turned it off right away. Price negotiable via WhatsApp. Contact: 0505635889