Cooling Operation - Fujitsu R410A Service Instruction

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