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SiUS071735EB
Main Functions
Functions and Control
18
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 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 (35.6 °F).
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 page 119 for details.
Refrigerant circulation rate (high)
high f
low f
freq=variable
Refrigerant circulation rate (low)
high speed
low speed
(R2812)
Amount of heat
exchanged air (large)
freq=
constant
50 Hz
60 Hz
capacity=
variable
Amount of heat
exchanged air (small)
AC
po
w
er
DC po
w
er
Amount of heat
exchanged air (large)
Amount of heat
exchanged air (small)
Frequency
Functions
Low
Four way valve operation compensation. Refer to page 34.
High
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 38.
Defrost control. Refer to page 40.
Summary of Contents for FDMQ09RVJU
Page 12: ...SiUS071735EB 1 List of Functions Part 1 List of Functions 1 Functions 2 ...
Page 14: ...SiUS071735EB 3 Specifications Part 2 Specifications 1 Specifications 4 ...
Page 125: ...SiUS071735EB Check Service Diagnosis 114 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS071735EB Check Service Diagnosis 116 15 18 24 class R20704 W V U DC_P1 DC_N1 ...