Cooling Operation - Fujitsu ARTG36LHTB Service 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 Figure1 based on the
fan speed mode and the outdoor temperature.
( Table1 : Compressor Frequency Range )
AOTG18KMCA
AOTG22KMCA
AOTG24KMCA
( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )
Outside air
temperature drops
A zone
34°C
B zone
30°C
C zone
19°C
D zone
10°C
E zone
0°C
F zone
minimum maximum
frequency frequency
10rps 99rps
10rps 99rps
10rps 99rps
Outside air
temperature rises
36°C
32°C
21°C
12°C
2°C
A zone
18KMCA
B zone
C zone
D zone
E zone
F zone
A zone
22KMCA
B zone
C zone
D zone
E zone
F zone
A zone
24KMCA
B zone
C zone
D zone
E zone
F zone
01-01
Hi Me Lo
99rps 44rps 34rps
99rps 44rps 34rps
78rps 44rps 34rps
42rps 33rps 26rps
42rps 33rps 26rps
42rps 33rps 26rps
99rps 46rps 36rps
99rps 46rps 36rps
99rps 46rps 36rps
42rps 33rps 30rps
42rps 33rps 30rps
42rps 33rps 30rps
99rps 46rps 36rps
99rps 46rps 36rps
99rps 46rps 36rps
42rps 33rps 30rps
42rps 33rps 30rps
42rps 33rps 30rps
Quiet
27rps
27rps
27rps
24rps
24rps
24rps
27rps
27rps
27rps
24rps
24rps
24rps
27rps
27rps
27rps
24rps
24rps
24rps