Heat Operation - Toshiba RAS-18YKH-E Service Manual

7-3. HEAT Operation

(MODE of the remote control : HEAT)
(1) Compressor, 4-way valve, outdoor fan and
operation display are controlled as shown in Fig.
7-3-1.
0
–1
Fig. 7-3-1
(2) A heat operation is carried out when the indoor
microcomputer sends the operation signal to the
outdoor microcomputer. The indoor fan motor
operates as shown in Fig. 7-3-2, when the FAN
is set to AUTO.
The motor operates with a constant air volume
as listed in Table 7-1-1, when the FAN is set to
LOW, MED, or HIGH.
RY01 OFF
Set
10,5
temp.
0
–0,5
–1,0
–1,5
Fig. 7-3-2
(3) 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 the START/STOP button.
OFF ON ON OFF ON
ON ON
FAN
AUTO Manual
LOW
LOW (+)
According
MED
to the set
position
MED (+)
HIGH
– 13 –
7-3-1. Louver Control
(1) By pushing the SET button of the remote control
during the operation, the louver can be set to the
desired position.
(2) When the AUTO button is pushed, the louver
vertically swings within range of 25deg.
And the louver position is stored in the micro-
computer, and at the next operation, the louvers
will be set to the stored position automatically at
the next operation.
7-3-2. Cool Airflow Control
(1) If the indoor heat-exchanger temperature
detected by the indoor heat-exchanger sensor is
16°C or below, the indoor fan stops and if the
temperature rises to 26°C or above, the fan is
restarted.
Details are in 7-8.