Heating Operation - Fujitsu ASU9RL Service Instruction

2. HEATING OPERATION

2-1 HEATING 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 lower by
frequency will attain to maximum performance.
* If the room temperature is higher
stopped.
* When the room temperature is between
the compressor frequency is controlled within the range shown in Table2.
However, the maximum frequency is limited in the range shown in Figure 2 based on the
fan speed mode and the outdoor temperature.
( Table 2 : Compressor Frequency Range )
ASU9RL
ASU12RL
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
Outside air
temperature
C zone
63°F
(17°C)
B zone
53°F
(12°C)
A zone
41°F
(5°C)
AA zone
* The room temperature is controlled
after starting the operation.
After 60 minutes, it is controlled based on the normal setting temperature.
6°F(3°C)
5°F(2.5°C)
+5°F(+2.5°C)
minimum maximum
frequency frequency
22Hz 99Hz
18Hz 130Hz
Outside air
temperature
66°F
9RL
(19°C)
57°F
(14°C)
12RL
45°F
(7°C)
4°F(2°C)
05-02
than a set temperature, the compressor operation
than a set temperatire, the compressor will be
to -6°F(-3°C) of the setting temperature,
Hi Me+
AA zone 99Hz 99Hz
A zone 99Hz 99Hz
B zone 99Hz 99Hz
C zone 99Hz 99Hz
AA zone
130Hz 130Hz
A zone
130Hz 130Hz
B zone
130Hz 130Hz
130Hz 130Hz
C zone
higher than the setting temperature for 60 minutes
Me Lo Quiet
90Hz 79Hz 70Hz
90Hz 79Hz 70Hz
90Hz 79Hz 58Hz
90Hz 79Hz 49Hz
105Hz 80Hz 64Hz
105Hz 80Hz 64Hz
105Hz 80Hz 51Hz
105Hz 80Hz 42Hz