Toshiba RAS-M10YDCV-E, Service Manual, Page: 14 / 62

– 14 –
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 flashes the operation
lamp.
This is the display of power-ON (or notification of
power failure).
• When pushing [START/STOP] button of 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 difference in motor speed of M+
and L–, and controlled.
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 difference in motor speed of M+
and L–, and controlled.
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
temperature sensor and the temperature set by
TEMP button and also any change in room
temperature.
• 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.