1-2. Heating operation
A sensor (room temperature thermistor) built in indoor unit body will usually perceive difference or
variation between setting temperature and present room temperature, and controls operation rota-
tion number of compressor.
• If the room temperature is 11 °F (6.0 °C) lower than a set temperature, the operation rotation num-
ber of compressor will attain to maximum performance.
• If the room temperature is 2 °F (1.0 °C) higher than a set temperature, the compressor will be
stopped.
• →hen the room temperature is within the range of +2 °F (1.0°C) to -11 °F (6.0°C) of the setting
temperature, the rotation number of compressor is controlled within the range shown below.
• Rotation number of compressor range
Unit: rps
Model name Minimum frequency Maximum frequency
ASUH18LMAS
ASUH24LMAS
10 130
1-3. Dry operation
The rotation number of compressor shall change according to the temperature, set temperature, and
room temperature variation which the room temperature sensor of the indoor unit has detected as
shown in the table below.
Zone is defined by set temperature and room temperature.
• Rotation number of compressor range
Unit: rps
Model name Outdoor temperature zone Operating frequency
ASUH18LMAS
↓ zone 22
J zone 18
↔ zone 0
ASUH24LMAS
↓ zone 46
J zone 24
↔ zone 0
• Compressor control based on room temperature
Ts+1°F
(Ts+0.5°C)
Ts-3°F
(Ts-1.5°C)
Ts+3°F
(Ts+1.5°C)
X zone
J zone
Y zone
Room temperature drops
Room temperature rises
Ts: Set temperature
Ts-1°F
(Ts-0.5°C)
1-2. Heating operation - (04-3) - 1. Rotation number control of compressor
CONTROL AND
FUNCTIONS
CONTROL AND
FUNCTIONS
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