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SiBE041029EB
Drawing of
Inverter
Main Functions
The following drawing shows a schematic view of the inverter principle:
Refrigerant circulation rate (high)
AC
power
Amount of heat
exchanged air (small)
DC
power
high speed
Amount of heat
exchanged air (large)
high f
low f
low speed
50 Hz
freq=
constant 60 Hz freq=variable
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
capacity=
variable
Refrigerant circulation rate (low)
Inverter Features
(R2812)
The inverter provides the following features:
„ The regulating capacity can be changed according to the changes in the outdoor
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„
„
„
Frequency Limits
temperature and cooling / heating load.
Quick heating and quick cooling
The rotation speed of the compressor 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.
The following functions regulate the minimum and maximum frequency:
Frequency
Low
High
Forced Cooling
Operation
Function and Control
Functions
„ Four way valve operation compensation. Refer to page 34.
„
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Compressor protection function. Refer to page 34.
Discharge pipe temperature control. Refer to page 35.
Input current control. Refer to page 36.
Freeze-up protection control. Refer to page 37.
Heating peak-cut control. Refer to page 37.
Defrost control. Refer to page 39.
Refer to page 104 for detail.
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