Outdoor Fan Motor Control - Toshiba RAS-M10PKVP-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
Outdoor temp. sensor
Sleep operation
Heating operation
Outdoor temp. sensor
Sleep operation
Operation flow and applicable data, etc.
YES
OFF status of
fan motor continues.
YES
Air conditioner
OFF
Compressor revolution (rps)
TO t 38°C
1 to 2 units
TO
TO < 38°C
1 to 2 units
TO t 38°C
TO < 38°C
TO is abnormal
Compressor revolution (rps)
TO > 10°C
TO d 10°C
TO
TO d 5°C
TO > 10°C
TO d 10°C
TO d 5°C
TO is abnormal
– 56 –
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.
Alarm
display
~16.8 ~41.3 ~51.5
450 (rpm) 650 (rpm) 730 (rpm)
450 (rpm) 650 (rpm) 650 (rpm)
450 (rpm) 650 (rpm) 650 (rpm)
450 (rpm) 650 (rpm) 650 (rpm)
450 (rpm) 650 (rpm) 650 (rpm)
450 (rpm) 650 (rpm) 730 (rpm)
TO : Outdoor temp. sensor
16.8 ~27.5 27.5~
390 (rpm) 650 (rpm) 650 (rpm)
500 (rpm) 650 (rpm) 790 (rpm)
650 (rpm) 790 (rpm) 850 (rpm)
390 (rpm) 500 (rpm) 650 (rpm)
390 (rpm) 650 (rpm) 650 (rpm)
390 (rpm) 650 (rpm) 650 (rpm)
390 (rpm) 650 (rpm) 790 (rpm)
TO : Outdoor temp. sensor
51.5~
730 (rpm)
730 (rpm)
730 (rpm)
730 (rpm)
650 (rpm)
730 (rpm)