Outdoor Fan Motor Control - Toshiba RAS-3M26S3AV-E Service Manual

Item
2. Outdoor fan The blowing air volume at the outdoor unit side is controlled.
motor control
Receiving the operation command from the controller of indoor
unit, the controller of outdoor unit controls fan speed.
∗ For the fan motor, a DC motor with non-stage variable speed
system is used.
However, it is limited to 8 stages for reasons of controlling.
Air conditioner ON
(Remote controller)
Indoor unit controller
1) Outdoor unit
operation command
(Outdoor fan control)
2) Fan speed ≥ 400
when the motor stopped.
Fan motor ON
3) Fan lock
4) Motor operates as shown in the table below.
Compressor revolution (rps)
Outdoor temp. sensor To
Compressor revolution (rps)
Outdoor temp. sensor To
Operation flow and applicable data, etc.
YES
fan motor continues.
NO
YES
Air conditioner
OFF
NO
Cooling operation, dry operation
Normal operation
Sleep operation
To is abnormal
Normal operation
Sleep operation
To is abnormal
OFF status of
Alarm
display
To≧38℃
28≦To＜38℃
15≦To＜28℃
10≦To＜15℃
5≦To＜10℃
0≦To＜5℃
To＜0℃
To≧38℃
To＜38℃
Heating operation
To≧10℃
0≦To＜10℃
-5≦To＜0℃
To＜-5℃
To≧10℃
0≦To＜10℃
-5≦To＜0℃
To＜-5℃
- 46 -
FILE NO. SVM-15074
Description
1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.
2) When strong wind blows at
outdoor side, the operation of air
conditioner continues with the fan
motor stopped.
3) Whether the fan is locked or not
is detected, and the operation of
air conditioner stops and an
alarm is displayed if the fan is
locked.
4) According to each operation
mode, by the conditions of
outdoor temperature (To) and
compressor revolution, the speed
of the outdoor fan shown in the
table is selected.
~16.8 ~41.3 ~51.5
390 650 800
390 650 650
300 650 650
300 650 650
390 390 390
390 300 300
0 0~300 0~300
390 650 650
390 650 650
390 650 650
To : Outdoor temp sensor
~16.8 ~27.5 28.1~
390 650 650
500 650 830
650 830 850
650 830 850
390 500 650
390 650 650
390 650 650
390 650 650
390 650 830
To : Outdoor temp sensor
52.1~
800
800
650
650
650
390
0~390
800
650
800