Outdoor Fan Motor Control - Toshiba RAS-2M21U2ACVG-SG 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.
NO
Fan motor ON
3) Fan lock
NO
4) Motor operates as shown in the table below.
Operation flow and applicable data, etc.
YES
OFF status of
fan motor continues.
YES
Air conditioner
OFF
Normal operation
To > 38
28 < To < 38
15 < To < 28
10 < To < 15
5 < To < 10
0 < To < 5
To < 0
Sleep or Quiet
To > 38
operation To < 38
To is abnormal
Normal operation
To > 38
28 < To < 38
15 < To < 28
10 < To < 15
5 < To < 10
0 < To < 5
To < 0
Sleep or Quiet
To > 38
operation To < 38
To is abnormal
Normal operation
To > 38
28 < To < 38
15 < To < 28
10 < To < 15
5 < To < 10
0 < To < 5
To < 0
Sleep or Quiet
To > 38
operation To < 38
To is abnormal
Alarm
display
Compressor revolution (rps)
~ 20 ~ 33 ~ 42
O
350 630 800
C
O
350 550 630
C
O
300 550 550
C
O
300 470 470
C
O
300 350 350
C
O
300 300 300
C
0 0300 0300
O
350* 550* 630*
C
300* 470* 550*
300~350 300~550 300~630 300~720
O
400 800 900
C
O
400 700 800
C
O
350 620 700
C
O
350 530 530
C
O
350 400 400
C
O
350 350 350
C
0 0~400 0~400
O
400* 700* 800*
C
350* 470* 700*
350~400 350~400 350~800 350~900
Compressor revolution (rps)
~ 16 ~ 18 ~ 36
O
400 800 900
C
O
400 700 800
C
O 350 600 700
C
O
350 530 530
C
O
350 400 400
C
O
350 350 350
C
0 0~400 0~400
O
400* 700* 800*
C
350* 470* 700*
350~400 350~400 350~800 350~900
*Maximum revolution
To : Outdoor temp. sensor
- 37 -
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.
~ 43
800
800
630
550
470
350
0300
800*
630*
900
900
800
700
470
400
0~400
900*
800*
~ 37
900
900
800
700
470
400
0~400
900*
800*