Indoor Fan Motor Control - Toshiba RAS-M07N4KVRG-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
Mode
Fan speed
level
Cool Heat
WF UH
WE UH H
WD H M+
WC M+
WB M
WA M
W9 L+
W8 L+ L
W7 L L-
W6 L-
W5 UL UL
W4
W3 SUL
W2 SUL
W1
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
Quiet
Air volume AUTO
M+(WC)
*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(W7)
from M+ and L)
Cooling
Fan speed (rpm)
Dry
1020 630
1020 630
UH
970 600
H 920 560
M+
830 490
M 780 460
750 430
L+ 690 380
560 300
L
560 280
L-
540 260
UL
540 260
SUL/SL- 520 250
520 250
500 230
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
W5
(Fig. 2)
Heating
Fan speed (rpm)
1030 640
980 610
930 570
860 510
790 460
760 440
690 380
560 300
560 300
550 270
550 270
550 270
520 250
520 250
500 230
- 24 -
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+,H or Quiet 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.