Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and turn the breaker off. Never try to repair by yourself or restart the system in such cases.
Main power cord is too hot or damaged.
Error code is generated by self diagnosis.
Water leaks from indoor unit even if the humidity is low.
Any switch, breaker (safety, earth) or fuse fails to work properly.
User must carry routine checkup & cleaning to avoid unit’s poor performance.
In case of special situation, the job must be carried out by service person only.