Indoor Fan Motor Control - Toshiba RAS-13SKV-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 COOL HEAT DRY
WF UH
WE H
UH
WD UH M+
WC H H
WB M+ M
M+
WA
M
W9 M L+
W8 L
W7 L+ L- L+
W6 L L
W5 L- UL L-
W4 UL UL
W3 SUL SUL
W2 SUL
W1
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
Air volume AUTO
M+(WB)
*3
*3 : Fan speed = (M + –L) x 3/4 + L
*4 : Fan speed = (M + –L) x 2/4 + L
*4
*5 *5 : Fan speed = (M + –L) x 1/4 + L
(Linear approximation
L(W6)
from M+ and L)
(Table 1) Indoor fan air flow rate
RAS-10SKVR-E RAS-13SKV-E
Fan speed Air flow rate Fan speed
(rpm) (m3/h) (rpm)
1210 571 1240
1210 571 1240
1170 546 1190
1120 515 1140
1040 465 1040
1000 440 100
960 415 960
870 359 870
850 347 850
760 291 760
760 291 760
700 253 700
650 222 650
500 129 500
500 129 500
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
RAS-13SKVR-E
Air flow rate Fan speed Air flow rate
(m3/h) (rpm) (m3/h)
630 1280 614
630 1280 614
596 1230 583
563 1160 540
496 1070 484
469 1030 459
443 990 434
383 870 359
369 860 353
309 770 297
309 770 297
269 720 266
236 670 234
135 520 141
135 500 129
– 34 –
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-16SKV-E RAS-16SKVR-E
Fan speed Air flow rate Fan speed
(rpm) (m3/h) (rpm)
1470 743 1510
1470 743 1510
1440 723 1480
1390 691 1430
1250 601 1280
1190 563 1220
1120 518 1150
970 421 1000
950 408 980
890 370 920
870 357 900
810 318 840
750 280 770
600 183 620
500 119 520
Air flow rate
(m3/h)
735
735
717
686
594
557
514
421
409
372
360
323
280
187
126