Cooling Operation - Fujitsu ASU30RLE Service Instruction

1-1 COOLING OPERATION

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 7.0°F(3.5°C) higher than a set temperature,
the compressor operation frequency will attain to maximum frequency.
.
If the room temperature is 1.0°F(0.5°C) lower than a set temperature, the compressor
will be stopped.
.
When the room temperature is between +7.0°F(3.5°C) to -1.0°F(0.5°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
fan speed mode and the outdoor temperature.
( Table 1 : Compressor frequency range )
AOU30RLXEH
( Fig 1 : Limit of maximum frequency based on outdoor temperature )
When the room
temperature drops
A zone
93.2°F
(34°C) B zone
86°F
C zone
(30°C)
66.2°F
D zone
(19°C)
50.0°F
E zone
(10°C)
32°F
F zone
(0°C)
Minimum Maximum
frequency frequency
17 rps 46 rps
When the room
temperature rises
96.8°F
(36°C)
89.6°F
AOU30RLXEH
(32°C)
69.8°F
(21°C)
53.6°F
(12°C)
35.6°F
(2°C)
01-01
Outdoor Indoor fan mode
temp. zone
Hi
Me
A zone
46 rps 31 rps
B zone 46 rps 31 rps
C zone
46 rps 31 rps
D zone
33 rps 27 rps
E zone
33 rps 27 rps
F zone
33 rps 27 rps
Quiet
Lo
25 rps 17 rps
25 rps 17 rps
25 rps 17 rps
23 rps 17 rps
23 rps 17 rps
23 rps 17 rps