Indoor Fan Motor Control; In Cooling Operation - Toshiba RAS-B10N3KV2-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, 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
(Table 1) Indoor fan air flow rate
Fan speed
level COOL HEAT DRY
WF
WE
WD
WC
WB
WA
W9
W8
W7
W6
W5
W4
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-B10N3KV2-E
Fan speed
(rpm)
UH 1210
H 1210
UH
UH M+ 1170
H H 1120
M
M+
M+ 1040
M
1000
M L+ 960
L 870
L+ L- L+ 850
L L 760
L- UL L- 760
UL UL 700
SUL SUL 650
SUL 500
500
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
RAS-B13N3KV2-E
Air flow rate Fan speed Air flow rate
(m3/h) (rpm) (m3/h)
571 1300 620
571 1300 620
546 1250 590
515 1200 570
465 1080 490
440 1050 465
415 990 434
359 870 359
347 860 353
291 770 297
291 770 297
253 720 266
222 670 234
129 520 141
129 500 129
– –
28
FILE NO. SVM-12050
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.