Dry Operation; Basic Control; Heating Operation; Cold Draft Preventing Control - Toshiba RAS-13UKV-E Service Manual

8-2-2. DRY Operation

(The Remote Controller MODE Button
is Set to the DRY
• 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.
• Dry operation signal is transmitted to outdoor unit.
• The Cooling operation giving priority to dehumidi-
fying, which restrains the indoor fan speed and
compressor motor speed, is performed.
• The indoor fan motor operates as shown in Fig. 8-
2-5. (Fan speed is AUTO only.)
• The outdoor fan motor operates as described in
Table 8-1-3, and the compressor motor speed
according to the operation command signal sent
from the indoor unit.
+2.5
+2.0
+1.5
+1.0
+0.5
Set
0
temp.
–0.5
NOTE :
*1 : Middle motor speed between L– and SUL
Fig. 8-2-5 Setting of air flow

8-2-3. Heating Operation

Transferring of heating operation signal from indoor
unit to outdoor unit starts.
The indoor fan motor operates by the room tempera-
ture when selecting "AUTO" of "FAN" as shown in
Fig. 8-2-6, and operates with a set air flow when
selecting "Low " to "High
However, to prevent cold draft, revolution speed of
the fan is restricted by indoor heat exchanger when
air flow is AUTO (Fig. 8-2-7) and starting of FAN
Manual.
[In starting and in stability]
• Until 12 minutes passed after operation start
• When 12 to 25 minutes passed after
FAN AUTO
operation start and room temp. is 3°C or
lower than set temp.
FAN Manual • Room temp. < Set temp. –4°C
Position)
L–
*1
SUL
".
In starting
– 27 –

[Basic control]

Set
0
temp.
–0.5
–1
–1.5
–2
–5.0
–5.5
[FAN AUTO]
*1, *2 : Approximate revolution speed of M+ and L to
linear according to temperature.
Fig. 8-2-6 Setting of air flow

[Cold draft preventing control]

The upper limit of fan revolution speed is shown
below.
44 33
43 32
31 20
30 19
2
*
A + 4 A
A – 8 A – 8
Starting
FAN
of FAN
AUTO
Manual
Fig. 8-2-7 Cold draft preventing control
NOTES :
(1) Stops for 2 minutes after thermostat-OFF.
(2) 24°C when the set temp. is 24°C or more
Set temp. when the set temp. is below 24°C
(3) SUL : Super ultra low
In stability
• When 12 to 25 minutes passed after operation start
and room temp. is higher than (set temp. –3°C)
• When 25 minutes or more passed after operation
start
• Room temp. ≥ Set temp. –3.5°C
LOW
1
*
2
*
M+
HIGH
HIGH
Approximate
revolution speed
of HIGH and SUL
linear by Tc.
3
*
SUL
SUL ( NOTE : * 1)
Stop