Indoor Fan Motor Control - Toshiba RAS-25S4KVPG-ND Service Manual

Item
2. Indoor fan <In cooling operation>
motor control
(This operation controls the fan speed at indoor unit side.)
The indoor fan (cross flow fan) is operated by the phase-
control induction motor. The fan rotates in 5 stages in
MANUAL mode, and in 5 stages in AUTO mode, respec-
tively. (Table 1)
COOL ON
Fan speed setup
AUTO
Ta
[ °C ]
+2.5
a
+2.0
b
+1.5
c
+1.0
d
+0.5
e
Tsc
(Table 1) Indoor fan air flow rate
Fan speed Mode
level
Cool Heat
WF UH
WE UH H
WD H M+
WC M+
WB M
WA M
W9 L+
W8 L+ L
W7 L L-
W6 L-
W5 UL UL
W4
W3 SUL SUL/SL-
W2 SUL
W1
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
Quiet
Air volume AUTO
M+(WC)
*3 *3 : Fan speed = (M + –L) x 3/4 + L
*4 *4 : Fan speed = (M + –L) x 2/4 + L
*5 *5 : Fan speed = (M + –L) x 1/4 + L
(Linear approximation
L(W7)
from M+ and L)
RAS-25S4KVPG-ND
Cooling
Dry
Fan speed Air flow rate
(rpm) (m3/h)
750
1050
750
1050
700
UH
1000
890 600
H
850 560
M+
500
M
780
570
750
670
L+ 390
570
300
L 520 250
230
L- 500
230
UL 500
230
500
210
480
180
440
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
W5
(Fig. 2)
Heating
Fan speed Air flow rate Fan speed
(rpm) (m3/h) (rpm)
800
1100 1080
750
1050 1080
930 640 1030
850 560 920
820 530 850
750
810
470
710 430 750
700
600 330
550
600
280
520
250
550
500 230
500
500 230
500
480
500
210
460
200
480
440 180 440
- 29 -
Description
* Symbols
UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L : Low
L- : Lo w–
UL : Ultra Low
SUL : Super Ultra Low
* The values of fan speed and air flow
volume indicate on the table are
measured when the louver is inclined
downward. Fan speed and air flow
volume broadly vary with position
of louver.
1) When setting the fan speed to L,
L+, M, M+,H or Quiet on the
remote controller, the operation is
performed with the constant
speed shown in Fig. 1.
2) When setting the fan speed to
AUTO on the remote controller,
revolution of the fan motor is
controlled to the fan speed level
shown in Fig. 2 and Table 1
according to the setup tempera-
ture, room temperature, and heat
exchanger temperature.
RAS-35S4KVPG-ND
Cooling Heating
Air flow rate Fan speed Air flow rate
(m3/h) (rpm)
780
1130
780
1080
730 960
630 900
560 850
520 800
470 740
425 630
330 570
280
540
230
500
230
500
230 480
210
460
180
440
(m3/h)
820
780
660
610
560
510
460
360
300
270
230
230
210
200
180