Indoor Fan Motor Control - Toshiba RAS-05J2KVG-EE 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
+1.0 c
d
+0.5
e
Tsc
Fan speed level
Mode
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 : Fan speed = (M + –L) x 2/4 + L
*4
*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-05J2KVG-EE
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 Cooling
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-19004
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-07J2KVG-EE
Heating
Air flow rate Fan speed Air flow rate
3
m /hr (rpm) m
504 1080 640
504 1080 640
484 1030 603
452 940 536
393 850 469
334 850 469
334 730 380
262 620 298
190 580 268
170 580 268
157 550 246
157 550 246
151 520 224
138 520 224
125 500 209
3
/hr