Fujitsu AW?Z24LBC, Service Instruction

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1. COOLING OPERATION
1-1 COOLING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit body 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 2°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
minimum
frequency maximum
frequency maximum
frequency
AW * Z24LBC 21Hz 47Hz 63Hz
Outside air Outside air
temperature temperature
36°C
A zone
34°C
32°C
B zone
30°C
21°C
C zone
19°C
D zone
Hi Me Lo Quiet
A zone 63Hz 43Hz 37Hz 27Hz
B zone 63Hz 43Hz 37Hz 27Hz
C zone 57Hz 39Hz 33Hz 23Hz
24LBC
D zone 39Hz 31Hz 27Hz 21Hz
E zone 39Hz 31Hz 27Hz 21Hz
F zone 39Hz 31Hz 27Hz 21Hz
S-Quiet
25Hz
25Hz
21Hz
21Hz
21Hz
21Hz
( Table 1 : Compressor Frequency Range )
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency .
The room temperature is controlled 1°C lower than the setting temperature for 40 minutes
after starting the operation.
After 40 minutes, it is controlled based on the normal setting temperature.
05-01
E zone
F zone
10°C
0°C
12°C
2°C
* When the room temperature is b2°C to -2.5°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
* If the room temperature is 2.5°C lower than a set temperature, the compressor will be
stopped.
( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )