Fujitsu ASU18RMLQ Service Instruction page 9

6-2. For AR Type
The maximum value of the indoor fan speed is set as shown in Figure 6, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
( Fig.6 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
91.4°F (33°C)
86°F (30°C)
6-3. For AU Type
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 7,
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.7 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
107.6°F (42°C)
102.2°F (39°C)
99°F (37°C)
86°F (30°C)
Indoor heat exchanger
temperature
102.2°F (39°C)
99°F (37°C)
86°F (30°C)
Indoor heat exchanger
temperature
Setting
Fan mode
Lo mode
S-Lo mode
< [Hi] setting >
Indoor heat exchanger
temperature
Hi
Me+
Lo
Cool air
prevention
S-Lo
< The other of [Hi] setting >
Indoor heat exchanger
Setting
temperature
FAN mode
Lo (Qu)
Cool air
prevention
S-Lo
01-06
86°F (30°C)
99°F (37°C)
93°F (34°C)
90°F (32°C)
75.2°F (24°C)
93°F (34°C)
90°F (32°C)
75.2°F (24°C)