Fujitsu R410A Service Instruction

( Fig .5 : Cool Air Prevention Control )
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 [HIGH] ~ [QUIET], the indoor motor will run at a constant
airflow of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table 4.
6. COOL AIR PREVENTION CONTROL (Heating mode)
( Fig. 4 : Airflow change - over ( Heating : AUTO ) )
TR-Ts > -3°F
(-1.5°C)
=
-5°F > TR-Ts
(-2.5°C)
-3°F > TR-Ts > -5°F
(-1.5°C) (-2.5°C)
=
TR-Ts > -2°F
(-1°C)
=
-4°F > TR-Ts
(-2°C)
-2°F > TR-Ts > -4°F
(-1°C) (-2°C)
=
When the room
temperature rises
When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
LOW mode
MED mode
MED+ mode
107.6°F
(42°C)
86°F
(30°C)
93.2°F
(34°C)
102.2°F
(39°C)
98.6°F
(37°C)
98.6°F
(37°C)
89.6°F
(32°C)
82.4°F
(28°C)
01-05
Cool air
prevention
S-Lo
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
*Lower speed is selected.
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
*Lower speed is selected.
10 min. later
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.
When the compressor does not operate, the indoor fan motor operates [S-Lo] or [Stop] mode.
107.6°F
(42°C)
86°F
(30°C)
102.2°F
(39°C)
98.6°F
(37°C)
93.2°F
(34°C)
98.6°F
(37°C)
89.6°F
(32°C)
82.4°F
(28°C)

Fujitsu R410A Specifications

General

Brand	Fujitsu
Model	R410A
Category	Air Conditioner
Language	English