Fujitsu General AOHG45KRTA, Service Manual, Page: 95 / 154

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 Minimum frequency Maximum frequency
ARXG45KHTB
ARXG54KHTB
17 rps 86 rps
• Limit of maximum speed based on outdoor temperature
36°C
A zone
34°C
32°C
B zone
30°C
21°C
C zone
19°C
D zone
E zone
F zone
10°C
0°C
12°C
2°C
Outdoor
temperature drops
Outdoor
temperature rises
Unit: rps
Model name
Outdoor
temperature
zone
Indoor unit fan mode
HIGH MED LOW QUIET
ARXG45KHTB
ARXG54KHTB
A zone 86 80 71 56
B zone 86 80 71 56
C zone 75 66 56 41
D zone 56 51 46 38
E zone 56 51 46 38
F zone 56 51 46 38
1-1. Cooling operation
- (04-1) -
1. Rotation number control of compressor
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS