Indoor Fan Motor Control - Toshiba RAS-B05E2KVG-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
Fan speed level
Mode
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
Air volume AUTO
M+(WC)
*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(W7)
from M+ and L)
(Table 1) Indoor fan air flow rate
RAS-B05E2KVG-E
Cooling
Dry Fan speed Air flow rate
3
(rpm)
m /hr
500
1200
1200 500
UH 1160 480
1110
H 467
M+ 960 388
M 870 340
800 304
L+ 750 275
600 190
L 550 170
L- 500 147
UL 500 147
SUL 500 147
500 147
500 147
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
(Fig. 2)
Heating
Fan speed Air flow rate Fan speed
3
(rpm) m /hr (rpm)
480
1160 1200
1160 480 1200
1100 462 1200
383
950 1150
870 340 1000
800 304 900
275
750 800
600 190
750
550 170 620
500 147 500
147
500 500
500 147 500
500 147 500
147
500 500
147
500 500
- 38 -
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-B07E2KVG-E
Cooling Heating
Air flow rate Fan speed Air flow rate
3
m /hr (rpm)
m
500 1200
500 1200
500 1150
1000
489
408 900
350 800
304 750
275 620
200 550
147 500
147 500
147 500
147 500
147 500
147 500
3
/hr
500
500
489
408
350
304
275
200
170
147
147
147
147
147
147