Indoor Fan Motor Control - Toshiba RAS-M07N3KV2-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
COOL
level
WF
WE
WD UH
WC H
WB M+
WA
W9 M
W8
W7 L+
W6 L
W5 L-
W4 UL
W3 SUL
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-M07N3KV2-E
HEAT DRY
Fan speed
(rpm)
UH 1240
H 1170
M+ UH 1140
H 1100
M+ M+ 1000
M 1000
L+ 960
L 870
L- L+ 850
L 760
UL L- 760
UL 700
SUL 650
SUL 500
500
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
Air flow rate
(m3/h)
630
582
563
536
469
469
443
383
369
309
309
269
236
135
135
– –
16
FILE NO. SVM-12072
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 values of fan speed and air flow
volume indicate on the table are measured
when the louver is inclined downward.
Fan speed and air flow volume broadly
vary with position of louver.
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 lev
shown in Fig. 2 and T able 1
according to the setup temper
ture, room temper ature, and heat
exchanger temperature.
el
a-