Fujitsu R410A, Service Instruction

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2. HEATING 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 lower by 9°F(4.5°C) than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is higher 1°F(0.5°C) than a set temperature, the compressor will be stopped.
* When the room temperature is b1°F(+0.5°C) to -9°F(-4.5°C) of the setting temperature,
the compressor frequency is controlled within the range shown in Table 2.
( Table 2 : Compressor frequency range )
Minimum
frequency Maximum
frequency
AOU18RLXFW1 14rps 67rps
AOU24RLXFW1 16rps 90rps
3. DRY OPERATION
The compressor rotation frequency shall change according to the temperature, set temperature,
and room temperature variation which the room temperature sensor of the indoor unit body has
detected as shown in the Table 3.
However, after the compressor is driven, the indoor unit shall run at operation frequency of
30rps (ASU18RLF), 30rps (ASU24RLF), for a minute.
Ts+1°F
(Ts+0.5°C)
Ts-1°F
(Ts-0.5°C)
Ts-3°F
(Ts-1.5°C)
Ts+3°F
(Ts+1.5°C)
( Table 3 : Compressor frequency )
( Fig. 2 : Compressor control based on room temperature )
Operating
frequency
25rps
15rps
0rps
AOU18RLXFW1 X zone
J zone
Y zone
Operating
frequency
J zone
Y zone
X zone 29rps
16rps
0rps
AOU24RLXFW1
Room Room
temperature temperature
X zone
J zone
Y zone
01-02