Cooling Operation; Cooling Capacity Control - Fujitsu AB*A30LBT Service Instruction

5. DESCRIPTION OF EACH CONTROL OPERATION

5-1. COOLING OPERATION

5-1-1 COOLING 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.
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 °C higher than a set temperature,
the compressor operation frequency will attain to maximum frequency.
* If the room temperature is 2.5 °C lower than a set temperature, the compressor
will be stopped.
* When the room temperature is between +2 °C to -2.5 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
( Table 1 : Compressor Frequency Range )
AO*A30LBTL
AO*A36LBTL
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
minimum maximum
frequency frequency
23Hz 94Hz
Outdoor air
temperature
34°C
30°C
19°C
10°C
0°C
When the room
temperature drops
Fan speed mode
A zone
AO*A30LBTL
AO*A36LBTL B zone
C zone
D zone
E zone
F zone
36°C
A zone
32°C
B zone
21°C
C zone
12°C
D zone
2°C
E zone
F zone
When the room
temperature rises
Hi Me Lo
94Hz 76Hz 64Hz
94Hz 76Hz 64Hz
85Hz 64Hz 57Hz
64Hz 57Hz 51Hz
05-01
Qu
51Hz
51Hz
51Hz
45Hz