Daikin SUPER MULTI NX G Series Service Manual page 39

SiUS12-928_A
Drawing of
The following drawing shows a schematic view of the inverter principle:
Inverter
Inverter Features
The inverter provides the following features:
 The regulating capacity can be changed according to the changes in the outdoor temperature
 Quick heating and quick cooling
 Even during extremely cold weather, the high capacity is achieved and maintained even when
 Comfortable air conditioning
 Energy-saving heating and cooling
Frequency Limits
The following functions regulate the minimum and maximum frequency:
Low
High
Forced Cooling Refer to "Forced operation mode" on page
Operation
Function and Control
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
and cooling / heating load.
The compressor rotational speed is increased when starting the heating (or cooling). This
ensures reaching the set temperature quickly.
the outdoor temperature is 2°C (36°F).
A fine adjustment is integrated to keep the room temperature constant.
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 47.
 Compressor protection function. Refer to page 48.
 Discharge pipe temperature control. Refer to page 49.
 Input current control. Refer to page 49.
 Freeze-up protection control. Refer to page 50.
 Heating peak-cut control. Refer to page 50.
 Defrost control. Refer to page 52.
Refrigerant circulation rate (high)
high f
low f
50 Hz
freq=
freq=variable
constant 60 Hz
Refrigerant circulation rate (low)
Functions
for detail.
59
high speed
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
low speed
capacity=
variable
Main Functions
(R2812)
30