– 15 –
0
Set
temp.
+0.5
+1
+1.5
+2
+2.5
+3
(Set temp.) 25˚C
˚C
M+
*1
*1
*1
L–
(Room temp
.) – (Set temp
.)
Set
temp.
+3
M+
*1
*1
*1
L–
+2.5
+2
+1.5
+1
+0.5
0
–0.5
˚C
(Room temp
.)
–
(Set temp
.)
In normal
operation
8-2. Description of Operation Circuit
• Turning [ON] the breaker will flash the operation
lamp.
This is the display of power-ON (or notification of
power failure).
• When pushing [START/STOP] button on the
remote controller, receive sound is issued from the
main unit.
8-2-1. Fan Only Operation
(The Remote controller MODE Button
is Set to the FAN ONLY Operation)
• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [START/STOP] button.
• When the FAN button is set to the AUTO position,
the indoor fan motor operates as shown in Fig.
8-2-1. When the FAN SPEED button is set
manually, the motor operates with a constant air
flow.
• ECO mode cannot be set.
NOTE :
*
1: Calculated from the difference in the motor speed
of M+ and L–.
Fig. 8-2-1 Auto setting of air flow
8-2-2. Cooling Operation
(The Remote controller MODE Button
is Set to the COOL Position)
• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [START/STOP] button.
• A cooling operation signal is transmitted to outdoor
unit.
• The indoor fan motor operates as shown in Fig.8-2-
2 when FAN button is set to AUTO.
• The motor operates with a constant air flow when
the FAN button is set manually.
• The outdoor unit controls the outdoor fan and the
compressor motor speed according to the opera-
tion command signal sent from the indoor unit.
NOTE :
*
1: Calculated from the difference in the motor speed
of M+ and L–.
Fig. 8-2-2 Setting of air flow [Air Flow AUTO]
1. Cooling capacity control
• The cooling capacity and room temperature are
controlled by changing the compressor motor
speed according to both the difference between
the temperature detected by the room tempera-
ture sensor and the temperature set by TEMP
button and also any change in room tempera-
ture.
• When compressor has been activated or
reactivated, compressor motor speed goes up
with restricting the maximum speed gradually
from operation start.
• When room temperature is lower than set
temperature, indoor fan motor is operated at fan
speed L– as shown in Fig. 8-2-2 while the
outdoor unit stops.
