Outdoor Fan Motor Control; Capacity Control - Toshiba RAS-M10GKCVP-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
Outdoor temp. sensor
Econo operation
4. Capacity
control
Indoor unit A
Indoor unit B
Indoor unit C
Operation mode
operating unit
COOL
∗
: In case that any multiple indoor units are combined.
Operation flow and applicable data, etc.
YES
fan motor continues.
NO
YES
Air conditioner
NO
Compressor revolution (rps)
TO > 38°C
TO
TO < 38°C
TO is abnormal
Outdoor unit
Inverter
No.of Combination
of indoor units
M10
1 unit M13
M16
¡ ∗
2 units
¡ ∗
3 units
OFF status of
Alarm
OFF display
20.3
390 (rpm)
1 to 2 units 390 (rpm)
1 to 2 units 390 (rpm)
TO > 38°C
390 (rpm)
TO < 38°C 390 (rpm)
510 (rpm)
Compressor
Compressor
revolution (rps)
16 to 45
16 to 72
16 to 77
19 to 84
23 to 92
– 32 –
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.
TO : Outdoor sensor
~50.3 ~62.8
670 (rpm) 670 (rpm) 740 (rpm)
510 (rpm) 670 (rpm) 740 (rpm)
510 (rpm) 670 (rpm) 740 (rpm)
510 (rpm) 670 (rpm) 670 (rpm)
390 (rpm) 510 (rpm) 510 (rpm)
510 (rpm) 670 (rpm) 670 (rpm)
1) Three indoor units from A to C
determine the respective
instruction revolutions from the
difference between the remote
controller setting temperature
(Ts) and the indoor temperature
(Ta), and transmit this to the
outdoor unit.
2) The outdoor unit receives the
instructions from the indoor
units, and the inverter operates
the compressor at the calculated
revolutions.
3) The compressor operation range
in each operating mode is shown
in the left table.
63.4~