Outdoor Fan Motor Control - Toshiba RAS-2M10G3AVG-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.
Cooling operation, dry operation
Compressor revolution (rps)
Outdoor temp. sensor To
Heating operation
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
Normal operation
Sleep or quiet
operation
To is abnormal
Normal operation
Sleep or quiet
operation
To is abnormal
Alarm
display
〜20
To≧38℃ 350
28≦To＜38℃ 350
15≦To＜28℃ 300
10≦To＜15℃ 300
5≦To＜10℃ 300
0≦To＜5℃ 300
To＜0℃ 0
To≧38℃ 350*
To＜38℃ 300*
300〜350 300〜550 300〜630 300〜700
To≧10℃
0≦To＜10℃
-5≦To＜0℃
To＜-5℃
To≧10℃
0≦To＜10℃
-5≦To＜0℃
To＜-5℃
- 35 -
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
3)
motor stopped.
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
4)
locked.
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.
〜42 〜55 56〜
630 700 800
550 630 700
550 550 630
470 470 550
350 350 470
300 300 350
0〜300 0〜300 0〜300
550* 630* 700*
470* 550* 630*
*Maximum revolution
To : Outdoor temp. sensor
〜31 〜46 47〜
420 470 550
470 550 630
680 680 680
680 680 680
420* 420* 470*
470* 470* 550*
550* 550* 550*
550* 550* 550*
550 550 630
*Maximum revolution
To : Outdoor temp. sensor