Indoor Fan Motor Control - Toshiba RAS-M10SKV-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
WF
WE
WD
WC
WB
WA
W9
W8
W7
W6
W5
W4
W3
W2
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 *4 : Fan speed = (M + –L) x 2/4 + L
*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-M10SKV-E
RAS-M10SKCV-E
COOL HEAT DRY
Fan speed
(rpm)
UH 1240
H 1170
UH M+ 1140
H 1100
M+ 1000
M 1000
M L+ 960
L 870
L+ L- L+ 850
L L 760
L- UL L- 760
UL UL 700
SUL SUL 650
SUL 500
500
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
RAS-M13SKV-E
RAS-M13SKCV-E
Air flow rate Fan speed Air flow rate
(m3/h) (rpm) (m3/h)
630 1240 630
582 1240 630
563 1190 596
536 1140 563
469 1040 496
469 100 469
443 960 443
383 870 383
369 850 369
309 760 309
309 760 309
269 700 269
236 650 236
135 500 135
135 500 135
– 28 –
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-M16SKV-E
RAS-M16SKCV-E
Fan speed Air flow rate
(rpm) (m3/h)
1470 743
1470 743
1440 723
1390 691
1250 601
1190 563
1120 518
970 421
950 408
890 370
870 357
810 318
750 280
600 183
500 119