Normal Operation - Fujitsu ARTG36LHTB Service Manual

5. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig.4.
On the other hand, if switched in [Hi] ~ [Quiet], the indoor motor will run at a constant airflow
of [Heat] operation modes Quiet, Lo, Me, Hi, as shown in Table4.
( Fig.4 : Airflow change - over ( Heating : Auto ) )
TR-Ts > -1°C
=
-1°C > TR-Ts > -2°C
=
-2°C > TR-Ts
6. COOL AIR PREVENTION CONTROL (Heating mode)
The maximum value of the indoor fan speed is set as shown in Fig.5, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
(Fig.5 : Cool Air Prevention Control)
<Normal operation>
Indoor heat exchanger
temperature rises
*Hi
or setting fan mode
42°C
*Me+
or setting fan mode
39°C
*Lo
or setting fan mode
37°C
Cool air
prevention
30°C
S-Lo
Indoor heat exchanger
temperature rises
*Hi
or setting fan mode
42°C
*Me+
or setting fan mode
39°C
*Lo
or setting fan mode
37°C
*Lo
or setting fan mode
30°C
*Lo
or setting fan mode
<10°C HEAT operation>
Indoor heat exchanger
temperature rises
Auto
39°C
Lo
When the room
temperature rises
Lo mode
Me mode
Me+ mode
Indoor heat exchanger
temperature drops
37°C
34°C
32°C
28°C
*Lower speed is selected.
7 min. later
Indoor heat exchanger
temperature drops
37°C
34°C
32°C
28°C
*Lower speed is selected.
Indoor heat exchanger
temperature drops
34°C
When the room
temperature drops
TR-Ts > -1.5°C
=
-1.5°C > TR-Ts > -2.5°C
-2.5°C > TR-Ts
<Powerful operation>
Indoor heat exchanger
temperature rises
42°C
39°C
37°C
30°C
Indoor heat exchanger
temperature rises
42°C
39°C
37°C
30°C
01-05
=
TR : Room temperature
Ts : Setting temperature
Indoor heat exchanger
temperature drops
Powerful
37°C
Hi
34°C
Lo
32°C
Cool air
prevention
28°C
S-Lo
7 min. later
Indoor heat exchanger
temperature drops
Powerful
37°C
Hi
34°C
Lo
32°C
Lo
28°C
Lo