Indoor Fan Motor Control - Toshiba RAS-M05G3KVSG-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
+1.0 c
d
+0.5
e
Tsc
(Table 1) Indoor fan air flow rate
Fan speed Mode
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
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
Dry Fan speed Air flow rate
3
(rpm)
(m /h)
950 529
950 529
UH 900 495
H 850 455
M+ 800 416
M 700 343
650 316
L+ 630 310
550 240
L 530 227
L- 520 212
UL 510 206
SUL/SL- 510 206
500 198
500 198
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
(Fig. 2)
Heating
Fan speed Air flow rate
3
(rpm)
(m /h)
900 495
900 495
850 455
800 416
740 373
700 343
650 316
570 266
550 246
530 227
520 212
510 206
510 206
510 206
500 198
- 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 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.