Main Functions SiENBE04-808_A
31 Function and Control
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
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, the 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 Limits The following functions regulate the minimum and maximum frequency:
Forced Cooling
Operation
Refer to “Forced operation mode” on page 60 for detail.
high f
low f
freq=variable
Refrigerant circulation rate (low)
high speed
low speed
(R2812)
Amount of heat
exchanged air (large)
freq=
constant
capacity=
variable
Amount of heat
exchanged air (small)
AC
power
DC
power
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
Refrigerant circulation rate (high)
Frequency Functions
Low Four way valve operation compensation. Refer to page 49.
High Compressor protection function. Refer to page 49.
Discharge pipe temperature control. Refer to page 50.
Input current control. Refer to page 51.
Freeze-up protection control. Refer to page 53.
Heating peak-cut control. Refer to page 53.
Defrost control. Refer to page 55.
To Next Page
Loading...
