Outdoor Fan Motor Control - Toshiba RAS-18J2KVSG-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 OFF.
(by strong wind)
Fan motor ON
3) Fan lock
4) Motor operates as shown in the table below.
In cooling operation
Compressor speed RAS-18J2AVSG-E
RAS-22J2AVSG-E
RAS-24J2AVSG-E
Fan speed range
To ≥ 38°C
To ≥ 28°C
To ≥ 15°C
To
To ≥ 5.5°C
To ≥ 0°C
To ≥ 0°C
When To is abnormal
Outdoor Fan Speeds (rpm)
Model name
f0
RAS-18J2AVSG-E 0
RAS-22J2AVSG-E 0
0
RAS-24J2AVSG-E
Operation flow and applicable data, etc.
Fan motor OFF continues
YES
(Use wind for heat
NO
YES
Air conditioner
NO
30.6 ≤ Hz
Hz < 20.4 20.4 ≤ Hz < 30.6
30.6 ≤ Hz
Hz < 20.5 20.4 ≤ Hz < 30.7
32.4 ≤ Hz
Hz < 20.4 20.4 ≤ Hz < 32.4
MIN MAX MIN MAX MIN
f6 fB f8 fE fA
f5 fA f7 fE f9
f3 f7 f5 f9 f7
f2 f5 f4 f7 f6
f1 f3 f3 f5 f4
f1 f2 f2 f4 f3
OFF fB OFF fE f1
f1 f2 f3 f4
300 300 300 360 450
300 300 300 360 450
300 300 300 450 500
exchanging)
Alarm
OFF display
Compressor speed RAS-18J2AVSG-E
RAS-22J2AVSG-E
RAS-24J2AVSG-E
MAX Fan speed range
fE To ≥ 10°C
fE To ≥ 5°C
fB To To ≥ -3°C
f9 To ≥ -10°C
f7 To < - 10°C
f5 When To is abnormal
fE
Fan speed range
f5 f6 f7 f8 f9
500 550 600 650
500 550 600 650
600 650 650 700
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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.
In heating operation
Hz < 20.4 20.4 ≤ Hz < 48.6
Hz < 20.5 20.4 ≤ Hz < 48.7
Hz < 20.6 20.4 ≤ Hz < 43.8
MIN MAX MIN MAX
f7 f8
f9 fB
fE fE
fE fE
fE fE
fE fF
fA fB fC fD fE
700 800 900 900 900
700 800 900 950 950
750 800 900 900 900
48.6 ≤ Hz
48.6 ≤ Hz
43.8 ≤ Hz
MIN MAX
f9
fE
fE
fE
fE
fF
fF
900
950
950