Rotation Number Control Of Compressor; Cooling Operation - Fujitsu ABYG54KRTA Service Manual

1. Rotation number control of compressor

1-1. Cooling operation

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
rotation number of the compressor.
• If the room temperature is 6.0 °C higher than a set temperature, the operation rotation number of
compressor will attain to maximum performance.
• If the room temperature is 1.0 °C lower than a set temperature, the compressor will be stopped.
• When the room temperature is within the range of +6.0°C to -1.0°C of the setting temperature, the
rotation number of compressor is controlled within the range shown in the table below. However,
the maximum rotation number is limited in the range shown in the figure below based on the in-
door fan mode and the outdoor temperature.
• Rotation number range of compressor
Model name
ABYG54KRTA
• Limit of maximum speed based on outdoor temperature
Model name
ABYG54KRTA
1-1. Cooling operation
Minimum frequency
Outdoor
temperature drops
A zone
34°C
B zone
30°C
C zone
19°C
D zone
10°C
E zone
0°C
F zone
Outdoor
temperature
HIGH
zone
A zone 95
B zone 95
C zone 80
D zone 56
E zone 56
F zone 56
17 rps
Outdoor
temperature rises
36°C
32°C
21°C
12°C
2°C
Indoor unit fan mode
MED
66
66
51
41
41
41
- (04-1) -
Maximum frequency
95 rps
Unit: rps
LOW QUIET
51 33
51 33
41 33
35 27
35 27
35 27
1. Rotation number control of compressor