Indoor Fan Motor Control - Toshiba RAS-25PKVSG-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
Quiet
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-25PKVSG-ND
Cooling
Dry Fan speed Air flow rate
(rpm) 3
(m /h)
1030
664
1030
664
1020
UH 657
970
H 620
850
M+ 530
800
M 493
750
455
700
L+ 416
600
343
590
L 336
580
L- 329
580
UL 329
540
SUL/SL- 299
520
284
500
269
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
W5
(Fig. 2)
Heating
Fan speed Air flow rate Fan speed
(rpm) 3 (rpm)
(m /h)
1200 1170
789
1200 1170
789
1150 1110
753
1000 1060
643
900 950
568
850 850
530
760 850
463
620 720
358
610 600
351
610 590
351
600 580
343
600 580
343
520 540
284
520 520
284
500 500
269
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FILE NO. SVM-17057
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-35PKVSG-ND
Cooling Heating
Air flow rate Fan speed Air flow rate
3 (rpm)
(m /h)
1250
768
1250
768
1200
723
1100
686
1000
605
880
530
770
530
620
432
610
343
610
336
600
329
600
329
520
299
520
284
500
269
3
(m /h)
825
825
789
716
643
552
470
358
351
351
343
343
284
284
269