Description Of Operation Circuit - Toshiba RAS-18UFHP-E3 Service Manual

7-2. Description of Operation Circuit

(1) When turning on the breaker, the operation lamp
blinks. This means that the power is on (or the
power supply is cut off.)
(2) When pressing [START / STOP] button on the
remote control, receiving beep sounds from the
indoor unit, and the next operation is performed
together with opening the vertical air flow louver.
(3) Once the operation mode is set, it is memorized in
the microcontroller so that the previous operation
can be effected thereafter simply by pressing
[START / STOP] button.
7-2-1. Fan only operation
([MODE] button on the remote control is set
to the fan only operation.)
(1) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-1. When
[FAN] button is set to LOW, LOW
HIGH, the motor operates with a constant air flow.
+3
+2.5
+2
+1.5
+1
+0.5
Preset
0
temp.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M+ and L–.
Fig. 7-2-1 Setting of air flow [FAN:AUTO]
(2) ECO and Hi Power operation cannot be set.
7-2-2. Cooling operation
(1) The compressor, 4-way valve, outdoor fan and
operation display on the remote control are
controlled as shown in Fig. 7-2-2.
Preset
temp.
+ +
, MED, MED or
(2) When [FAN] button is set to AUTO, the indoor fan
M+
motor operates as shown in Fig. 7-2-3. When
*1
[FAN] button is set to LOW, LOW
HIGH, the motor operates with a constant air flow.
*1
*1
L—
Preset
temp.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M+ and L–.
– 32 –
FILE NO. SVM-04032
([MODE] button on the remote control is set
to the cooling operation.)
0.5
0
Fig. 7-2-2
+3
+2.5
+2
+1.5
+1
+0.5
0
-0.5
Fig. 7-2-3 Setting of air flow [FAN:AUTO]
ON ON
OFF ON OFF OFF ON
+ +
, MED, MED or
M+
*1
*1
*1
L—