Operation Description; Outline Of Air Conditioner Control - Toshiba RAS-13UKPX-T2 Service Manual

7-1. Outline of Air Conditioner Control

This is a fixed capacity type air conditioner, which uses
a AC motor for an indoor fan. The AC motor drive
circuit is mounted in the indoor unit. And electrical
parts which operate the compressor and the outdoor
fan motor, are mounted in the outdoor unit.
The air conditioner is mainly controlled by the indoor
unit controller. The controller operates the indoor fan
motor based upon commands transmitted by the
remote control and transfers the operation commands
to the outdoor unit controller.
The outdoor unit controller receives operation
commands from the indoor unit, and operates the
outdoor fan motor and the compressor.
(1) Role of indoor unit controller
The indoor unit controller receives the operation
commands from the remote control and executes
them.
• Temperature measurement at the air inlet of the
indoor heat exchanger by the indoor
temperature sensor
• Temperature setting of the indoor heat
exchanger by the heat exchanger sensor
• Louver motor control
• Indoor fan motor operation control
• LED display control
• Transferring of operation commands to the
outdoor unit
• Receiving of information of the operation status
and judging of the information or indication of
error
Model
HIGH
Cooling MED+
and MED
Fan only LOW+
LOW
Cooling HIGH
and MED
Fan only LOW

7. OPERATION DESCRIPTION

Table 7-1-1
RAS-13UKPX-T2
Motor speed Air flow level
(rpm) (m 3 /h)
1,300 630
1,220 600
1,150 550
1,070 500
1,000 460
RAS-13UKX
1,300 630
1,150 550
1,000 460
– 21 –
7-1-1. Louver control
(1) Vertical air flow louver
Position of veritcal air flow louver is automatically
controlled according to the operation mode.
Besides, position of vertical air flow louver can be
arbitrarily set by pressing [FIX] button.
The louver position which is set by [FIX] button is
stored in the microcomputer, and the louver is
automatically set at the stored position for the next
operation.
(2) Swing
If [SWING] button is pressed when the indoor unit is
in operation, the vertical air flow louver starts
swinging. When [FIX] button is pressed, it stops
swinging.
7-1-2. Indoor fan control (AC Fan motor)
(1) The indoor fan is operated by the stepless speed
change AC motor.
(2) For air flow level, speed of the indoor fan motor is
controlled in five steps (LOW, LOW
and HIGH). If AUTO mode is selected, the fan
motor speed is automatically controlled by the
difference between the preset temperature and the
room temperature.
+
LOW =
MED + =
RAS-10UKPX-T2
Motor speed Air flow level
(rpm) (m 3 /h)
1,300 630
1,180 560
1,050 490
950 430
850 370
RAS-10UKX
1,300 630
1,050 490
850 370
FILE NO. SVM-02003
+
, MED, MED
LOW+MED
2
MED+HIGH
2
RAS-07UKPX-T2
Motor speed Air flow level
(rpm) (m 3 /h)
1,200 570
1,100 520
1,000 460
900 400
800 340
+