Daikin E-Series Service Manual page 82

SiBE12-817
5. Upper and lower limit of frequency by PI control
Function and Control
The frequency upper and lower limits are set depending on the total of S values of a room.
When low noise commands come from the indoor unit more than one room or when outdoor
unit low noise or quiet commands come from all the rooms, the upper limit frequency must
be lowered than the usual setting.
Control Specification
71