Fujitsu AB*14LBAJ Service Instruction page 11

5. COOL AIR PREVENTION CONTROL (Heating mode)
5-1. For AB/ AR/ AU Type
The maximum value of the indoor fan speed is set as shown in Figure 4, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
( Fig.4 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
33°C
30°C
5-2. For AB*F/ AU*F Type
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 5,
based on the detected temperature by the indoor heat exchanger sensor on heating mode.
When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.
( Fig.5 : Cool Air Prevention Control )
< [Hi] setting >
Indoor heat exchanger
temperature
42°C
39°C
37°C
30°C
5-3. For AS Type
The maximum value of the indoor fan speed is set as shown in Figure 6, based on the fan speed mode
and the detected temperature by the indoor heat exchanger sensor on heating mode.
( Fig.6 : Cool Air Prevention Control for AS*7/ 9/ 12LMACW )
Indoor heat exchanger
temperature
42°C
35°C
30°C
18°C
Indoor heat exchanger
temperature
SETTING
FAN MODE
LO mode
S-LOW mode
Indoor heat exchanger
temperature
Hi
Me+
Lo
Cool air
prevention
S-Lo
[ Cool air prevention 400rpm, S-Lo 300rpm ]
Indoor heat exchanger
temperature
E zone
D zone
C zone
B zone
A zone
01-08
30°C
< The other of [Hi] setting >
Indoor heat exchanger
temperature
39°C
37°C
37°C
34°C
30°C
32°C
24°C
39°C
Fan speed
mode
ZONE
32°C
E zone
D zone
26°C C zone
B zone
15°C
A zone
Indoor heat exchanger
Setting
temperature
FAN mode
Lo (Qu)
Cool air
prevention
S-Lo
AUTO HIGH MED LOW QUIET
AUTO
Setting Fan Speed
AUTO Me
Lo Lo Lo
S-Lo S-Lo S-Lo S-Lo
OFF OFF OFF OFF
34°C
32°C
24°C
S-Lo
OFF