Cooling Operation - Fujitsu AS*G09LTCB Service Instructions Manual

1. COOLING OPERATION

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.
* If the room temperature is some degrees 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.
However, the maximum frequency is limited in the range shown in Fig.1 based on the indoor
fan mode and the outdoor temperature.
( Table 1 : Compressor frequency range )
AS*G09LTCB
AS*G12LTCB
AS*G14LTCB
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency
( Fig.1 : Outdoor temperature zone )
Outdoor
temperature drops
A zone
34°C
B zone
30°C
C zone
19°C
D zone
10°C
E zone
0°C
F zone
Minimum Maximum
frequency frequency
18rps 76rps
15rps 57rps
12rps 63rps
Outdoor
temperature rises
36°C
32°C
21°C
12°C
2°C
Maximum
frequency
96rps
76rps
91rps
to Maximum Frequency .
( Table 2 : Limit of maximum speed based on outdoor temperature )
Outdoor
temp. zone
A zone
AS*G09LTCB
B zone
C zone
D zone
E zone
F zone
AS*G12LTCB A zone
B zone
C zone
D zone
E zone
F zone
AS*G14LTCB A zone
B zone
C zone
D zone
E zone
F zone
01-01
Indoor fan mode
Hi Me Lo Quiet
96rps 61rps 51rps 33rps
96rps 61rps 51rps 33rps
96rps 61rps 51rps 33rps
57rps 42rps 36rps 27rps
57rps 42rps 36rps 27rps
57rps 42rps 36rps 27rps
76rps 45rps 37rps 29rps
76rps 45rps 37rps 29rps
76rps 45rps 37rps 26rps
43rps 35rps 26rps 20rps
51rps 37rps 31rps 22rps
51rps 37rps 31rps 22rps
91rps 44rps 34rps 24rps
91rps 44rps 34rps 24rps
72rps 44rps 34rps 24rps
52rps 30rps 21rps 18rps
63rps 34rps 27rps 19rps
63rps 34rps 27rps 19rps