Peak-Cut Control - Daikin E Series Service Manual

Control Specification
3.8

Peak-cut Control

Outline In heating operation, malfunctioning of the unit (for example dirty filters) can cause the
discharge pressure to rise excessively and reach unacceptable levels. To avoid this, peak-cut
control will monitor the condensing temperature and when necessary decrease the operating
frequency in an attempt to lower the discharge pressure at an early stage.
Detail In a similar way as with the freeze protection function, the peak-cut control function regulates
the maximum operation frequency as indicated in the picture underneath.
Fig. : Peak-cut control function graph
When recovering from a total stop (return area) :
Up-area:
Steady area:
Step down area:
Stop area:
68
Heat exchanger
thermistor temperature
65˚C
56˚C
53˚C
51˚C
46˚C
Frequency settings remain unchanged.
The maximum frequency increases with approximately 2Hz every 2 minute.
The maximum frequency remains constant.
The maximum frequency decreases with approximately 4Hz every 20sec.
The compressor, indoor fan and outdoor fan will stop.
Stop area
Step down area
Steady area
Up area
Return area
SiBE04-624
(R5910)
Function and Control