Indoor Fan Motor Control - Toshiba RAS-18, 22SKV-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, respectively.
(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
COOL HEAT
level
WF UH
WE H
WD M+
WC H
WB M+ M
WA
W9 M L+
W8 L
W7 L+ L–
W6 L
W5 L– UL
W4 UL
W3 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-18SKV-E
RAS-18SKV2-E
RAS-18SKV-A
DRY
RAS-18SKV-ND
Fan speed Air flow rate
(rpm) (m 3 /h)
1100 991
1100 991
1090 980
1070 957
980 858
940 813
890 758
780 636
L+ 750 603
L 740 591
L– 700 547
UL 700 547
SUL 650 492
500 325
500 325
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
RAS-22SKV-E
RAS-18SKVR-E RAS-22SKV2-E
RAS-18SKVR-A RAS-22SKV-A
RAS-22SKV-ND
Fan speed Air flow rate Fan speed Air flow rate
(rpm) (m 3 /h) (rpm)
1100 972 1200
1100 972 1200
1090 962 1200
1070 940 1180
980 843 1080
940 799 1020
890 745 980
780 626 850
750 594 810
740 583 800
700 540 760
700 540 700
650 486 650
500 324 500
500 324 500
– 35 –
FILE NO. SVM-10050
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-22SKVR-E
RAS-22SKVR-A
Fan speed Air flow rate
(m 3 /h) (rpm)
1101 1200
1101 1200
1101 1200
1079 1180
968 1080
902 1020
858 980
713 850
669 810
658 800
614 760
547 700
492 650
325 500
325 500
(m 3 /h)
1080
1080
1080
1059
951
886
843
702
659
648
605
540
485
324
324