Heating Operation; Dry Operation - Fujitsu AGU12RLF Service Instruction

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 6°F(3°C) than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is higher 5°F(2.5°C) than a set temperatire, the compressor will be
stopped.
* When the room temperature is between +5°F(+2.5°C) to -6°F(-3°C) of the setting temperature,
the compressor frequency is controlled within the range shown in Table 3.
( Table 3 : Compressor frequency range )
AOU9RLFF
AOU12RLFF
AOU15RLFF

3. DRY OPERATION

The compressor 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 4.
However, after the compressor is driven, the outdoor unit shall run at operation frequency of
51rps (9RLFF), 51rps (12RLFF), 52rps (15RLFF) for a minute.
( Table 4 : Compressor frequency in Dry mode)
AOU X zone
9RLFF
J zone
Y zone
( Fig.2 : Compressor Control based on Room Temperature )
Room
temperature
X zone
Ts+1°F
(Ts+0.5°C)
J zone
Ts-3°F
(Ts-1.5°C)
Y zone
Minimum
Air flow
frequency
Upper & Lower
16rps
Upper
Upper & Lower
16rps
Upper
Operating
frequency
26rps
AOU
12RLFF
18rps
0rps
Room
temperature
Ts+3°F
(Ts+1.5°C)
Ts-1°F
(Ts-0.5°C)
Maximum
frequency
119rps
140rps
Operating
frequency
X zone 26rps
J zone
18rps
Y zone
0rps
01-02
Operating
frequency
AOU X zone 24rps
15RLFF
J zone
16rps
Y zone
0rps