Outdoor Fan Motor Control - Toshiba RAS-5M34U2AVG-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
OFF status of
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
Alarm
display
~16.8
To≧38℃ 380
28≦To＜38℃ 380
15≦To＜28℃ 300
10≦To＜15℃ 300
5≦To＜10℃ 380
0≦To＜5℃ 380
To＜0℃ 0
To≧38℃ 380
To＜38℃ 380
380
Heating operation
~16.8
To≧10℃ 380
0≦To＜10℃ 500
-5≦To＜0℃ 650
To＜-5℃ 650
To≧10℃ 380
0≦To＜10℃ 380
-5≦To＜0℃ 380
To＜-5℃ 380
380
- 69 -
FILE NO. SVM-18053
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.
~41.3 ~51.5 52.1~
650 850 850
650 650 850
650 650 650
650 650 650
380 380 650
300 300 390
0~300 0~300 0~380
650 650 850
650 650 650
650 650 850
To : Outdoor temp sensor
~27.5 28.1~
650 650
650 850
850 850
850 850
500 650
650 650
650 650
650 650
650 850
To : Outdoor temp sensor