Cooling Operation - Fujitsu AS* A09LEC Service Instruction

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 speed of the compressor.
* If the room temperature is
speed will attain to maximum performance.
* If the room temperature is
stopped.
* When the room temperature is between
the compressor speed is controlled within the range shown in Table1.
However, the maximum speed is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
( Table 1 : Compressor speed range )
ASYA09LEC
ASYA12LEC
( Fig. 1 : Limit of maximum speed based on outdoor temperature )
When 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
When the compressor operates for 30 minutes continuously at over the maximum speed ,
the maximum speed is changed from Maximum speed
2°C higher than a set temperature, the compressor operation
2.5°C lower than a set temperature, the compressor will be
+2°C
Minimum Maximum
speed speed
18rps 62rps
18rps 80rps
When outdoor
temperature rises
36°C
32°C
21°C
12°C
2°C
to -2.5°C of the setting temperature,
Maximum
speed
64rps
96rps
Hi
09LEC A zone 64rps
B zone 64rps
C zone 64rps
D zone 42rps
E zone
52rps
F zone 52rps
A zone 96rps
12LEC
B zone 96rps
C zone 96rps
D zone 57rps
E zone 57rps
F zone
57rps
to Maximum speed .
01-01
Me Lo Quiet
50rps 42rps 30rps
50rps 42rps 30rps
50rps 42rps 30rps
35rps 30rps 23rps
45rps 40rps 29rps
45rps 40rps 29rps
61rps 51rps 33rps
61rps 51rps 33rps
61rps 51rps 33rps
42rps 36rps 27rps
42rps 36rps 27rps
42rps 36rps 27rps