Outdoor Fan Motor Control - Toshiba RAS-24J2KVG-UA 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
Model Name
RAS‐24J2AVG-E, -TR, -UA, -EE
Hz < 16.8
Fan Speed Ranges Min
To  38C f6
To  28C f5
To  15C 3 f
To
To  5.5C f2
To  0C 1 f
To < 0C 1 f
When To is abnormal OFF
Outdoor Fan Speeds (rpm)
RAS‐24J2AVG-E, -TR, -UA, -EE
Tap
f1 300
f2 300
f3 300
f4 360
f5 450
f6 500
f7 550
f8 600
f9 650
fA 700
fB 700
fC 800
fD 900
fE 980
fF 980
Operation flow and applicable data, etc.
YES
OFF status of
fan motor continues.
YES
Air conditioner
OFF
~ 31.7
Compressor Speeds (rps)
16.8  Hz < 37.2 37.2 ≤ Hz
Max Min Max Min Max
fB f8 fE fA
fA 7 f fE 9 f
7 f 5 f 9 f f7
f5 f4 f7 f6
3 f 3 f 5 f 4 f
2 f 2 f 4 f 3 f
fB OFF fE f1
Alarm
display
Model Name
RAS‐24J2AVG-E, -TR, -UA, -EE
To  10C
fE T < o 10C
To
C
< 5
fE T o
< ‐
fB T o 3C
f9 When To is abnormal
f7
f5
fE
- 31 -
FILE NO. SVM-19002
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.
Heating Operation
Compressor Speeds (rps)
Hz < 21.0 21.0  Hz < 42.0 42.0 ≤ Hz
7 f 8 f
f9 fB
E f E f
E f E f
fF fF
f9
fE
fE
fE
fF