SiE12-411 Main Functions
Function and Control 71
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
The compressor rotational speed is increased when starting the heating (or cooling). This
enables a quick set temperature.
" Even during extreme cold weather, the high capacity is achieved. It is maintained even when
the outdoor air temperature is 2°C.
" Comfortable air conditioning
A detailed adjustment is integrated to ensure a fixed room temperature. It is possible to air
condition with a small room temperature variation.
" 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 table shows the functions that define the minimum and maximum frequency:
Forced Cooling /
Heating Operation
For more information, refer to “Forced operation mode” on page 102.
60 120 300
45°C
inverter
normal heat pump
Start
seconds
(R1187)
Air discharge
temperature
Frequency limits Limited during the activation of following functions
Low " Four way valve operation compensation. Refer to page 91.
High " Input current control. Refer to page 92.
" Compressor protection function. Refer to page 91.
" Heating Peak-cut control. Refer to page 93.
" Freeze-up protection. Refer to page 93.
" Defrost control. Refer to page 95.
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