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Main Functions
Drawing of
The following drawing shows a schematic view of the inverter principle:
Inverter
Inverter Features
The inverter provides the following features:
Frequency Limits
The following functions regulate the minimum and maximum frequency:
Low
High
Refer to page 147 for detail.
Forced Cooling
Operation
16
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
freq=
constant
The regulating capacity can be changed according to the changes in the outdoor
temperature and cooling / heating load.
Quick heating and quick cooling
The compressor rotational speed is increased when starting the heating (or cooling). This
enables to reach the set temperature quickly.
Even during extreme cold weather, high capacity is achieved. It is maintained even when the
outdoor temperature is 2°C.
Comfortable air conditioning
A fine adjustment is integrated to keep the room temperature constant.
Energy saving heating and cooling
Once the set temperature is reached, the energy saving operation enables to maintain the
room temperature at low power.
Frequency
Four way valve operation compensation. Refer to page 56.
Compressor protection function. Refer to page 57.
Discharge pipe temperature control. Refer to page 58.
Input current control. Refer to page 59.
Freeze-up protection control. Refer to page 60.
Heating peak-cut control. Refer to page 60.
Defrost control. Refer to page 63.
Refrigerant circulation rate (high)
high speed
high f
low f
low speed
50 Hz
capacity=
freq=variable
60 Hz
variable
Refrigerant circulation rate (low)
Functions
SiBE04-624_B
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
(R2812)
Function and Control
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