Daikin FTXS30HVJU, Руководство по обслуживанию

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SiUS04-924 Main Functions
12 Function and Control
1. Main Functions
1.1 Frequency Principle
Main Control
Parameters
The compressor is frequency-controlled during normal operation. The target frequency is set by the
following 2 parameters coming from the operating indoor unit:

The load condition of the operating indoor unit

The difference between the room temperature and the set temperature
Additional
Control
Parameters
The target frequency is adapted by additional parameters in the following cases:

Frequency restrictions

Initial settings

Forced cooling operation
Inverter Principle
To regulate the capacity, a frequency control is needed. The inverter makes it possible to vary the
rotation speed of the compressor. The following table explains the conversion principle:
Drawing of
Inverter
The following drawing shows a schematic view of the inverter principle:
Inverter Features
The inverter provides the following features:

The regulating capacity can be changed according to the changes in the outdoor air
temperature and cooling / heating load.

Quick heating and quick cooling.
Phase Description
1 The supplied AC power source is converted into a DC power source.
2 The DC power source is reconverted into a three-phase AC power source with variable
frequency.

When the frequency increases, the rotation speed of the compressor increases resulting in
increased refrigerant circulation. This leads to a higher amount of heat exchange per unit.

When the frequency decreases, the rotation speed of the compressor decreases resulting
in decreased refrigerant circulation. This leads to a lower amount of heat exchange per unit.
50 Hz
60 Hz
Refrigerant circulation rate (high)
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
AC
po
w
er
freq=
constant
DC
po
w
er
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
high f
low f
freq=variable
capacity=
variable
Refrigerant circulation rate (low)
high speed
low speed
(R2812)