Heating Operation; Dry Operation - Fujitsu GENERAL ASHG18KMTE Service Manual

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 6.0 °C lower than a set temperature, the operation rotation number of
compressor will attain to maximum performance.
• If the room temperature is 1.0 °C higher than a set temperature, the compressor will be stopped.
• →hen the room temperature is within the range of +1.0 °C to - 6.0 °C of the setting temperature,
the rotation number of compressor is controlled within the range shown below.
• Rotation number range of compressor
Model name
ASHG18KMTE
ASHG24KMTE

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 range of compressor
Model name
ASHG18KMTE
ASHG24KMTE
• Compressor control based on room temperature
1-2. Heating operation
Minimum frequency
Outdoor temperature zone
Room temperature drops
X zone
Ts+0.5°C
J zone
Ts -1.5°C
Y zone
8
10
↓ zone
J zone
Y zone
↓ zone
J zone
Y zone
Room temperature rises
Ts: Set temperature
- (04-3) -
Unit: rps
Maximum frequency
120
130
Unit: rps
Operating frequency
26
20
0
24
18
0
Ts+1.5°C
Ts-0.5°C
1. Rotation number control of compressor