Heating Operation - Fujitsu AO G18KATA Series Service Instruction

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
Model name
AUXG18KRLB
AUXG22KRLB
• Limit of maximum speed based on outdoor temperature
In heating operation, maximum frequency is defined by outdoor temperature and fan mode.
Model name
AUXG18KRLB
AUXG22KRLB
1-2. Heating operation
Minimum frequency
Outdoor
temperature rises
14°C
-10°C
Outdoor
temperature
HIGH
zone
A zone 110
B zone 110
C zone 110
A zone 120
B zone 120
C zone 120
12
8
Outdoor
temperature drops
C zone
12°C
B zone
-12°C
A zone
Indoor unit fan mode
MED
108
108
108
112
112
112
- (04-2) -
Unit: rps
Maximum frequency
110
120
Unit: rps
LOW QUIET
74 68
74 68
74 68
84 73
84 73
60 52
1. Compressor frequency control