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.
Fan motor ON
3) Fan lock
4) Motor operates as shown in the table below.
Cooling operation, dry operation
RAS-M18GAV-E, RAS-M18GACV-E
Normal operation
Econo operation
To is abnormal
RAS-M14GAV-E, RAS-M14GACV-E
Normal operation
Econo operation
To is abnormal
Operation flow and applicable data, etc.
YES
fan motor continues.
NO
YES
Air conditioner
NO
Compressor revolution (rps)
To > 38°C
28 < To ≤ 38
15 < To ≤ 28
10 < To ≤ 15
5.5 < To ≤ 10
0 < To ≤ 5.5
To > 38°C
To ≤ 38°C
Compressor revolution (rps)
To > 38°C
28 < To ≤ 38
15 < To ≤ 28
10 < To ≤ 15
5.5 < To ≤ 10
0 < To ≤ 5.5
To > 38°C
To ≤ 38°C
OFF status of
Alarm
OFF display
~20 ~30
450 700
450 650
350 550
350 550
300 450
300 350
450 650
450 550
— 450 650
To: Outdoor sensor temp. (°C) (rpm)
~20 ~30
450 700
450 650
350 550
350 550
300 450
300 350
450 650
450 550
— 450 650
To: Outdoor sensor temp. (°C) (rpm)
– 41 –
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.
~46 46~
750 850
700 750
650 700
550 550
450 550
350 450
700 750
650 700
700 750
~60 60~
750 850
700 750
650 700
550 650
450 550
350 450
700 750
650 700
700 750