Fujitsu AOUG09LMAS1, Service Manual

Page: 80 / 134

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 fre-
quency of compressor.
• If the room temperature is 6.0 °C lower than a set temperature, the compressor operation frequen-
cy will attain to maximum performance.
• If the room temperature is 1.0 °C higher than a set temperature, the compressor will be stopped.
• When the room temperature is within the range of +1.0°C to -6.0°C of the setting temperature, the
compressor frequency is controlled within the range shown below.
• Compressor frequency range
Unit: rps
Model name Minimum frequency Maximum frequency
ASUG09LMAS
ASUG12LMAS
12 110
• Limit of maximum speed based on outdoor temperature
In heating operation, maximum frequency is defined by outdoor temperature and fan mode.
A zone
12°C
B zone
14°C
C zone
-10°C
-12°C
Outdoor
temperature rises
Outdoor
temperature drops
Unit: rps
Model name
Outdoor
temperature
zone
Indoor unit fan mode
HIGH MED LOW QUIET
ASUG09LMAS
ASUG12LMAS
A zone 110 89 77 67
B zone 110 89 77 67
C zone 110 89 77 36
1-2. Heating operation
- (04-2) -
1. Compressor frequency control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS