Fujitsu R410A, Service Instruction

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( Fig.1 : Limit of maximum frequency based on outdoor temperature )
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 7°F(3.5°C) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
Minimum
frequency Maximum
frequency
AOU18RLXFW1 12rps 55rps
AOU24RLXFW1 16rps 72rps
Outside air Outside air
temperature temperature
96.8°F
(36°C)
A zone
93.2°F
(34°C)
89.6°F
(32°C)
B zone
86°F
(30°C)
69.8°F
(21°C)
C zone
66.2°F
(19°C)
D zone
Hi Me Lo Quiet
A zone
Zone
55rps 36rps 29rps 25rps
B zone 55rps 36rps 29rps 25rps
C zone 47rps 36rps 29rps 25rps
AOU18RLXFW1
D zone 37rps 33rps 26rps 20rps
E zone 37rps 33rps 26rps 20rps
F zone 37rps 33rps 26rps 20rps
72rps 49rps 41rps 29rps
72rps 49rps 41rps 29rps
55rps 41rps 36rps 29rps
43rps 36rps 31rps 20rps
43rps 36rps 31rps 20rps
41rps 36rps 31rps 20rps
A zone
B zone
C zone
AOU24RLXFW1
D zone
E zone
F zone
( Table 1 : Compressor frequency range )
01-01
E zone
F zone
50°F
(10°C)
32°F
(0°C)
53.6°F
(12°C)
35.6°F
(2°C)
* When the room temperature is b7°F(+3.5°C) to -1°F(-0.5°C) of the setting temperature,
the compressor frequency is controlled within the range shown in Table 1.
However, the maximum frequency is limited in the range shown in Fig. 1 based on the
fan speed mode and the outdoor temperature.
* If the room temperature is 1°F(0.5°C) lower than a set temperature, the compressor will be stopped.