Dear K.Tipaporn
Since we now have problems on air conditioning of the room# 7318 is not connected to the system. Which the system will need to take 4 hours and will need to turn off the air conditioning room 7..11-7..20 , The engineering department is submitted to the time available to correct such problems.
If the time is convenient to fix the problem. Please inform the engineering department to plan in the next step.