Outdoor Fan Motor Control - Toshiba RAS-15EKV-UL Service Manual

Item
The blowing air volume at the outdoor unit side is controlled.
3. Outdoor fan
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 OFF.
(by strong wind)
Fan motor ON
3) Fan lock
4) Motor operates as shown in the table below.
In cooling operation
Compressor speed (rps)
To ≥ 100°F (38°C)
To ≥ 82°F (28°C)
To ≥ 59°F (15°C)
To
To ≥ 42°F (5.5°C)
To ≥ 32°F (0°C)
To ≥ 22°F (-5°C)
To ≥ 100°F (38°C)
To ≥ 82°F (28°C)
During ECO,
To ≥ 59°F (15°C)
QUIET and
To ≥ 42°F (5.5°C)
comfort sleep
To ≥ 32°F (0°C)
To ≥ 22°F (-5°C)
When To is abnormal
Tap
RAS-15EA Series
f 0 0
f 1 230
f 2 300
f 3 350
f 4 410
f 5 480
f 6 500
f 7 530
Operation flow and applicable data, etc.
Fan motor OFF continues
YES
NO
YES
Air conditioner
NO
< 22.1 < 50.3
MIN MAX MIN MAX MIN MAX
f 6 f 9 f 8 f B
f 5 f 9 f 7 f B
f 3 f 7 f 5 f 9
f 1 f 3 f 1 f 7
f 1 f 3 f 1 f 5
f 0 f 1 f 0 f 3
f 6 f 9 f 8 f B
f 5 f 9 f 7 f B
f 3 f 7 f 5 f 9
f 1 f 3 f 1 f 7
f 1 f 3 f 1 f 5
f 0 f 1 f 0 f 3
f 1 f F f 1 f F
Outdoor fan speed (rpm)
RAS-17EA Series RAS-22EA Series
0
0
230
230
300 300
350
350
410
410
480 480
500
500
530 530
(Use wind for heat
exchanging)
Alarm
OFF display
50.3 < Compressor speed (rps)
f A f E
To
f 9 f E
f 7 f B
f 3 f 9
f 3 f 7 During
f 1 f 4 ECO mode
f A f B
f 9 f B When To is abnormal
f 7 f B
f 3 f 9
f 3 f 7
f 1 f 4
f 1 f F
Tap
RAS-15EA Series
f 8 560
f 9 640
f A 670
f B 700
f C 800
f D 800
f E 900
f F 900
– 33 –
FILE NO. SVM-13070
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
< 30.5 < 55.1
To ≥ 50°F (10°C)
f 6
To ≥ 42°F (5.5°C)
f 8
To ≥ 22°F (-5°C)
f A
f A
To < 22°F (-5°C)
To ≥ 50°F (10°C)
f 5
To ≥ 42°F (5.5°C)
f 7
To ≥ 22°F (-5°C)
f 9
To < 22°F (-5°C)
f 9
f D
RAS-22EA Series
RAS-17EA Series
560
640
670
700
800
800
1000
1000
55.1 <
f 8 f 9
f A f C
f B f D
f B f D
f 7 f 9
f 9 f B
f A f B
f A f B
f D f D
560
640
670
750
920
920
1000
1000