Outdoor Fan Motor Control - Toshiba RAS-25PKVSG-ND Service Manual

Item
3. 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 speed RAS-25PAVSG-ND
(Hz) RAS-35PAVSG-ND
Fan tap
To ≥ 38°C
To ≥ 28°C
To ≥ 15°C
To
To ≥ 5.5°C
To ≥ 0°C
To ≥ - 4°C
To < - 4°C
When To is abnormal
Outdoor fan speed (rpm)
Tap RAS-25PAVSG-ND
W0 0
W1 200
W2 300
W3 300
W4 360
W5 440
W6 500
W7 550
W8 600
Operation flow and applicable data, etc.
YES
fan motor continues.
NO
YES
Air conditioner
NO
In cooling operation
Hz < 13.8 13.8 ≥ Hz < 32.4
Hz < 21.0 21.0 ≥ Hz < 46.2
MIN MAX MIN MAX
W6 WB W8 WE
W5 WA W7 WE
W3 W7 W5 W9
W2 W5 W4 W7
W1 W3 W3 W5
W1 W2 W2 W4
OFF OFF OFF W3
OFF WB OFF WE
RAS-35PAVSG-ND
0
200
300
300
360
440
500
550
600
OFF status of
Alarm
OFF display
Compressor speed
32.4 ≤ Hz
(Hz)
46.2 ≤ Hz
MIN MAX
WA WE
To
W9 WE
W7 WB
W6 W9
When To is abnormal
W4 W7
W3 W5
W1 W4
W1 WE
Tap RAS-25PAVSG-ND
W9 650
WA 700
WB 700
WC 750
WD 750
WE 750
WF 800
- 31 -
FILE NO. SVM-17057
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.
In heating operation
RAS-25PAVSG-ND Hz < 13.8 13.8 ≥ Hz < 32.4
RAS-35PAVSG-ND Hz < 21.0 21.0 ≥ Hz < 46.2
Fan tap MIN MAX MIN
To ≥ 10°C W7
To ≥ 5°C W9
To ≥ -3°C WE
To ≥ -10°C WE
To < - 10°C WE
WE
RAS-35PAVSG-ND
650
700
700
750
800
850
900
32.4 ≤ Hz
46.2 ≤ Hz
MAX MIN MAX
W8 W9
WB WE
WE WE
WE WE
WE WE
WE WE