Peak Cut Control - Daikin FTX25JVEA9 Service Manual

System control
3.12

Peak Cut Control

Outline Based on the indoor heat exchanger intermediate temperature signal sent from the indoor unit,
the compressor output frequency is regulated to lower the compressor capacity in order to
prevent an abnormal increase of the high pressure.
Details Zones are produced based on the heat exchanger temperature signal sent from the BP unit
(indoor unit), and the peak-cut control prevents an abnormal rise of the high pressure.
A change of 2 Hz is made when each zone fluctuates.
The reset zone is set for 30 seconds when the operation mode is changed, for 30 seconds when
the number of operating room units increase, and for 20 seconds when the number of operating
room units decrease.
With each operation of the HPS operation counter, the above zone judgment temperature is
decreased by 2°C.
With each operation of the peak-cut abnormal operation counter , the above drooping speed is
increased by 1 Hz.
128
56˚C
52˚C
50˚C
Drooping speed : 2Hz/40sec
Drooping zone
No-change zone
Reset zone
(M1018)
Si18-201
Main Functions