Indoor Fan Motor Control - Toshiba RAS-25E2KVG-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
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
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-25E2KVG-ND
Cooling
Dry Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate
3
(rpm)
(m /h)
718
1100
718
1100
702
UH 1080
596
H 940
900 566
M+
488
M 800
400
700
378
L+ 670
261
520
520 261
L
470 236
L-
450 230
UL
450 230
SUL/SL-
230
450
450 230
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
(Fig. 2)
Heating
3
(rpm) (rpm)
(m /h)
1180 781 1150
1150 758 1150
1000
638 1120
604
950 980
850 527 900
750
450 850
690 392
750
540 275
670
500 247
520
500 247 520
500 247 500
247
500 500
480 240
500
240
480 450
480 240 450
- 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-35E2KVG-ND
Cooling Heating
3
(rpm)
(m /h)
758 1300
758 1270
734 1150
624 1050
566 930
527
790
700
450
378
550
261
500
261 500
247 500
247 500
247
480
230
480
230 480
3
(m /h)
870
850
758
680
588
480
400
283
247
247
247
247
240
240
240