Daikin FTKM-U Series Service Manual page 31

SiMX042215E
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
 Quick cooling
 Comfortable air conditioning
 Energy saving cooling
Frequency Limits The following functions regulate the maximum frequency:
 Compressor protection function. Refer to page 39.
 Discharge pipe temperature control. Refer to page 39.
 Input current control. Refer to page 40.
 Freeze-up protection control. Refer to page 41.
Forced Cooling
Refer to page 103 for details.
Operation
Part 4 Functions and Control
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
freq=
constant
temperature and cooling load.
The rotation speed of the compressor is increased when starting the cooling.
This enables to reach the set temperature quickly.
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.
Refrigerant circulation rate (high)
high speed
high f
low f
low speed
50 Hz
capacity=
freq=variable
60 Hz
variable
Refrigerant circulation rate (low)
Main Functions
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
(R2812)
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