Fujitsu AU*A12LALN Service Instruction page 36

5-2. HEATING OPERATION
5-2-1 HEATING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is lower 3 °C than a set temperature,
the compressor operation frequency will attain to maximum performance.
* If the room temperature is higher 2.5 °C than a set temperature, the compressor
will be stopped.
* When the room temperature is between +2.5 °C to -3 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.
However, the maximum frequency is limited in the range shown in Figure 2 based on
the outdoor temperature.
( Table 2 : Compressor Frequency Range )
AU*A12LALN
AU*A14LALN
AU*A18LALN
AU*A24LALN
AU*A36LATN
AU*A45LATN
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
Outdoor air
temperature
19°C
14°C
When the room
temperature rises
minimum
frequency
18Hz
18Hz
18Hz
18Hz
18Hz
18Hz
C zone
17°C
B zone
12°C
A zone
When the room
temperature drops
maximum
frequency
120Hz
120Hz
120Hz
120Hz
90Hz
90Hz
Fan speed mode
AU*A12LALN
AU*A14LALN
AU*A18LALN
AU*A24LALN
AU*A36LATN
AU*A45LATN
05-02
Hi Me
C zone 120Hz 101Hz
B zone 120Hz 101Hz
A zone 120Hz 101Hz
C zone 120Hz 101Hz
B zone 120Hz 101Hz
A zone 120Hz 101Hz
C zone 120Hz 101Hz
B zone 120Hz 101Hz
A zone 120Hz 101Hz
C zone 120Hz 101Hz
B zone 120Hz 101Hz
A zone 120Hz 101Hz
C zone 90Hz 66Hz
B zone 90Hz 66Hz
A zone 90Hz 66Hz
C zone 90Hz 66Hz
B zone 90Hz 66Hz
A zone 90Hz 66Hz
Lo Qu
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
75Hz 60Hz
53Hz 45Hz
53Hz 45Hz
53Hz 45Hz
53Hz 45Hz
53Hz 45Hz
53Hz 45Hz