Indoor Fan Motor Control - Toshiba RAS-18N3KCV Service Manual

Item
2. Indoor fan <In cooling operation>
motor control
The indoor fan motor is operated in 5 stages in MANUAL
mode (Fig.1) and 5 stages in AUTO mode (Fig. 2)
Table 1 shown the indoor fan speed and air flow rate of
each mode.
COOL ON
Fan speed setup
AUTO
Ta
[ ˚C ]
+2.5
a
+2.0
b
+1.5
c
+1.0
d
+0.5
e
Tsc
(Table 1) Indoor fan air flow rate
Fan speed
COOL
DRY
level
WF
WE
UH UH
WD
H H
WC
M+ M+
WB
WA M
W9 M
W8
L+ L+
W7
L L
W6
L- L-
W5
W4 UL UL
SUL SUL
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)
RAS-18N3KCV
Fan speed Air flow rate
(rpm) (m3/h)
1000
888
1000
888
1000
888
980
858
920
795
870
738
860
724
800
658
750
603
740
591
700
547
700
547
650
492
500
325
500
325
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
– 26 –
FILE NO. SVM-12053
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.