2. HEATING OPERATION
2-1 HEATING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit 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 lower 5.4
deg
F(3
deg
C) than a set temperature,
the compressor operation frequency will attain to maximum performance.
* If the room temperature is higher 3.6
deg
F(2
deg
C) than a set temperature, the compressor
will be stopped.
* When the room temperature is b3.6
deg
F(+2
deg
C) to -5.4
deg
F(-3
deg
C) of
the setting temperature, the compressor frequency is controlled within the range shown in Table2.
However, the maximum frequency is limited in the range shown in Figure 2 based on
the outdoor temperature.
( Table 2 : Compressor Frequency Range )
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
01-02
minimum
frequency
maximum
frequency
20Hz
20Hz
20Hz
87Hz
87Hz
95Hz
Outdoor air
temperature
E zone
68
°
F
(20
°
C)
D zone
C zone
B zone
A zone
A zone
87Hz
85Hz
70Hz
70Hz
60Hz
87Hz
85Hz
70Hz
70Hz
90Hz
80Hz
80Hz
60Hz
95Hz
95Hz
B zone
C zone
ABU18RULX
D zone
E zone
A zone
B zone
ABU24RULX
C zone
D zone
E zone
A zone
B zone
C zone
D zone
E zone
ABU36RSLX
60.8
°
F
(16
°
C)
53.6
°
F
(12
°
C)
41
°
F
(5
°
C)
Limit of Maximum
Frequency
ABU18RULX
ABU24RULX
ABU36RSLX
