( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )
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 4°F(2°C) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
minimum
frequency
maximum
frequency
ASU9RLF 22rps 79rps
ASU12RLF 18rps 96rps
ASU15RLS 15rps 80rps
Outside air Outside air
temperature temperature
96.8°F
(36°C)
A zone
93.2°F
(34°C)
89.6°F
(32°C)
B zone
86°F
(30°C)
69.8°F
(21°C)
C zone
66.2°F
(19°C)
D zone
Hi Me Lo Quiet
A zone 79rps 61rps 52rps 37rps
B zone 79rps 61rps 52rps 37rps
C zone 79rps 61rps 52rps 37rps
9RLF
D zone 52rps 43rps 37rps 28rps
E zone 64rps 55rps 49rps 36rps
F zone 64rps 55rps 49rps 36rps
96rps 61rps 51rps 33rps
96rps 61rps 51rps 33rps
96rps 61rps 51rps 33rps
57rps 42rps 36rps 27rps
57rps 42rps 36rps 27rps
57rps 42rps 36rps 27rps
A zone
B zone
C zone
12RLF
15RLS
D zone
E zone
F zone
80rps 45rps 37rps 29rps
80rps 45rps 37rps 29rps
80rps 45rps 37rps 29rps
47rps 37rps 31rps 22rps
47rps 37rps 31rps 22rps
47rps 37rps 31rps 22rps
A zone
B zone
C zone
D zone
E zone
F zone
( Table1 : Compressor Frequency Range )
01-01
E zone
F zone
50°F
(10°C)
32°F
(0°C)
53.6°F
(12°C)
35.6°F
(2°C)
* When the room temperature is between +4°F(+2°C) to -5°F(-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.
* If the room temperature is 5°F(2.5°C) lower than a set temperature, the compressor will be
stopped.
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