Cooling Operation - Fujitsu AB A30LBT Series Service Instruction

1-1. COOLING OPERATION

A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature,
and controls the operation speed of the compressor.
* If the room temperature is 2 °C higher than a set temperature,
the compressor operation speed will attain to maximum speed.
* If the room temperature is some degree lower than setting temperature,
the compressor is likely to stop.
* When the room temperature is between +2 °C to -2.5 °C of the setting temperature,
the compressor speed is controlled within the range shown in Table 1.
However, the maximum speed is limited in the range shown in Figure 1 based
on the fan speed mode and the outdoor temperature.
( Table 1 : Compressor Speed Range )
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
( Fig.1 : Limit of Maximum Speed based on Outdoor Temperature )
Outdoor air
temperature
34°C
30°C
19°C
10°C
0°C
When the room
temperature drops
Fan speed mode
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
minimum maximum
speed speed
16rps 72rps
A zone
B zone
C zone
D zone
E zone
F zone
When the room
temperature rises
Hi Me
A zone 72rps 50rps
B zone 72rps 50rps
C zone 56rps 42rps
D zone 42rps 37rps
E zone 42rps 37rps
F zone 42rps 37rps
01-01
36°C
32°C
21°C
12°C
2°C
Lo Qu
42rps 29rps
42rps 29rps
37rps 29rps
32rps 20rps
32rps 20rps
32rps 20rps