Fujitsu ASU9RL - Indoor Unit Parts - Control Box; Indoor Unit Control Box Components; Indoor Unit Controller PCB Assembly; Indoor Unit Display Assembly Parts

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
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 4
°F(2°C) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
minimum
frequency
maximum
frequency
maximum
frequency
ASU9RL 22Hz 76Hz 79Hz
ASU12RL 18Hz 80Hz 96Hz
Outside air Outside air
temperature temperature
97°F
(36°C)
A zone
93°F
(34°C)
90°F
(32°C)
B zone
86°F
(30°C)
70°F
(21°C)
C zone
66°F
(19°C)
D zone
Hi Me Lo Quiet
A zone 79Hz 61Hz 52Hz 37Hz
B zone 79Hz 61Hz 52Hz 37Hz
C zone 79Hz 61Hz 52Hz 37Hz
9RL
D zone 52Hz 43Hz 37Hz 28Hz
E zone 64Hz 55Hz 49Hz 36Hz
F zone 64Hz 55Hz 49Hz 36Hz
A zone 96Hz 61Hz 51Hz 33Hz
B zone 96Hz 61Hz 51Hz 33Hz
C zone 96Hz 61Hz 51Hz 33Hz
12RL
D zone 57Hz 42Hz 36Hz 27Hz
E zone 57Hz 42Hz 36Hz 27Hz
F zone 57Hz 42Hz 36Hz 27Hz
( 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 .
05-01
E zone
F zone
50°F
(10°C)
32°F
(0°C)
54°F
(12°C)
36°F
(2°C)
* When the room temperature is between +4°F(+2°C) to -5°F(-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 5
°F(2.5°C) lower than a set temperature, the compressor will be
stopped.