Cooling Operation - Fujitsu As*A09Lkc Service Instructions Manual

1. COOLING OPERATION

1-1 COOLING 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 2°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is 2.5°C lower than a set temperature, the compressor will be
stopped.
* When the room temperature is between +2°C to -2.5°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
( Table 1 : Compressor Frequency Range )
AS*A09LKC
AS*A12LKC
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
Outside air
temperature
A zone
34°C
B zone
30°C
C zone
19°C
D zone
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency
minimum maximum
frequency frequency
22Hz 76Hz
18Hz 80Hz
Outside air
temperature
09LKC
36°C
32°C
12LKC
21°C
maximum
frequency
79Hz
96Hz
Hi
A zone 79Hz
B zone 79Hz
C zone 79Hz
D zone 52Hz
A zone 96Hz
B zone 96Hz
C zone 96Hz
D zone 57Hz
to Maximum Frequency .
01-01
Me Lo Quiet
61Hz 52Hz 37Hz
61Hz 52Hz 37Hz
61Hz 52Hz 38Hz
43Hz 37Hz 28Hz
61Hz 51Hz 33Hz
61Hz 51Hz 33Hz
61Hz 51Hz 33Hz
42Hz 36Hz 27Hz