Fujitsu GENERAL AOHG18KMTA, Service Manual

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