Indoor Fan Motor Control - Toshiba RAS-07EKV-EE 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
level
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)
(Table 1) Indoor fan air flow rate
RAS-07EKV-EE
COOL HEAT DRY
Fan speed
(rpm)
UH 1130
H 1130
UH
UH M+ 1100
H H 1050
920
M
M+
M+
900
M
850
M L+
700
L
650
L+ L- L+
650
L L
600
L- UL L-
580
UL UL
550
SUL SUL
520
SUL
500
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
RAS-10EKV-EE
Air flow rate Fan speed Air flow rate Fan speed
(m3/h) (rpm) (m3/h)
565
521 1200
565
521 1200
502 1200 565
471 534
1150
390
1000 440
378 950 409
347 378
900
253 750 284
222 700 253
222 253
700
191 650 222
179 620 203
160 580 179
141 520
141
129 500 129
– 28 –
FILE NO. SVM-13029
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-13EKV- EE
Air flow rate
(rpm) (m3/h)
596
1250
596
1250
596
1250
565
1200
471
1050
1000 440
950 409
800 316
750 284
750 284
700 253
650 222
600 191
520
141
500 129