Fujitsu ABHG54KRTA, Service Manual

Page: 99 / 154

1. Compressor frequency control
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
frequency of the compressor.
• If the room temperature is 6.0 °C higher than a set temperature, the compressor operation fre-
quency 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
compressor frequency is controlled within the range shown in the table below. However, the maxi-
mum frequency is limited in the range shown in the figure below based on the indoor fan mode
and the outdoor temperature.
• Compressor frequency range
Model name Minimum frequency Maximum frequency
ABHG54KRTA 17 rps 95 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
ABHG54KRTA
A zone 95 66 51 33
B zone 95 66 51 33
C zone 80 51 41 33
D zone 56 41 35 27
E zone 56 41 35 27
F zone 56 41 35 27
1-1. Cooling operation
- (04-1) -
1. Compressor frequency control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS