Outdoor Fan Motor Control - Toshiba RAS-B10GKVP-E 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.
NO
Fan motor ON
3) Fan lock
NO
4) Motor operates as shown in the table below.
Cooling operation, dry operation
RAS-M18GAV-E, RAS-M18GACV-E
Compressor revolution (rps)
Normal
operation
Econo
operation
To is abnormal
RAS-M14GAV-E, RAS-M14GACV-E
Compressor revolution (rps)
Normal
operation
Econo
operation
To is abnormal
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Operation flow and applicable data, etc.
YES
OFF status of
fan motor continues.
YES
Air conditioner
OFF
~20
To > 38°C 450
28 < To < 38 450
15 < To < 28 350
10 < To < 15 350
5.5 < To < 10 300
0 < To < 5.5 300
To > 38°C 450
To < 38°C 450
— 450
To: Outdoor sensor temp. (°C) (rpm)
~20
To > 38°C 450
28 < To < 38 450
15 < To < 28 350
10 < To < 15 350
5.5 < To < 10 300
0 < To < 5.5 300
To > 38°C 450
To < 38°C 450
— 450
To: Outdoor sensor temp. (°C) (rpm)
– 40 –
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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.
Alarm
display
~30 ~46 46~
700 750 850
650 700 750
550 650 700
550 550 550
450 450 550
350 350 450
650 700 750
550 650 700
650 700 750
~30 ~60 60~
700 750 850
650 700 750
550 650 700
550 550 650
450 450 550
350 350 450
650 700 750
550 650 700
650 700 750
Description
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