1, the power has power, if power outages; 

2, the power plug is in good contact; 

3, remote control battery has power, such as lack of electricity, the transmitted signal is weak, the indoor unit can not receive; 

4, the remote is too far from the receiver, or the angle is too partial misalignment receiver. 

If upon inspection no more than a few questions, please see your professional and technical personnel on-site for you.