Indoor Fan Motor Control - Toshiba RAS-B05BKVG-E 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
Fan speed level Made
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
W2 SUL
W1
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
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)
(Table 1) Indoor fan air flow rate
RAS-B05BKVG-E
Cooling
Dry Fan speed Air flow rate
3
(rpm)
m /hr
1050 484
1050 484
UH 1020 465
H 970 432
M+ 890 380
M+ 810 327
810 327
L+ 700 255
600 190
L 570 170
L- 550 157
UL 550 157
SUL 540 151
520 138
500 125
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
(Fig. 2)
Heating
Fan speed Air flow rate Fan speed
3
(rpm) m /hr (rpm)
1050 618 1080
1050 618 1080
1000 581 1050
910 514 1000
830 454 910
830 454 820
720 373 820
620 298 710
580 268 600
580 268 570
550 246 550
550 246 550
520 224 540
520 224 520
500 209 500
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FILE NO. SVM-18006
Description
* Symbols
UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L : Low
L- : Low–
UL : Ultra Low
SUL : Super Ultra Low
* The fan speed broadly varies due
to position of the louver, etc.
The described value indicates one
under condition of inclining
downward blowing.
1) When setting the fan speed to L,
L+, M, M+ or H 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-B07BKVG-E
Cooling Heating
Air flow rate Fan speed Air flow rate
3
m /hr (rpm)
m
504 1080
504 1080
484 1030
452 940
393 850
334 850
334 730
262 620
190 580
170 580
157 550
157 550
151 520
138 520
125 500
3
/hr
640
640
603
536
469
469
380
298
268
268
246
246
224
224
209