Indoor Fan Motor Control - Toshiba RAS-25J2KVSG-ND 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,
respectively. (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
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)
(Table 1) Indoor fan air flow rate
RAS-25J2KVSG-ND
Cooling
Dry Fan speed
(rpm)
1100 771
1100 771
UH 1000 686
H 950 652
M+ 900 607
M 800 525
650 401
L+ 630 385
580 343
L 530 300
L- 520 294
UL 510 287
SUL/SL- 510 287
500 280
500 280
(Fig. 1)
Fan speed
W7
(L + M) / 2
WA
(M + H) / 2
WD
(Fig. 2)
Cooling
Heating
Fan speed
Fan speed
(rpm)
1200 858 1100
1150 821
1100
1000 686
1050
900 607 1000
800 525 900
700 442
800
650 401 650
580 343 630
550 314
580
530 300
530
520 294 520
510 287
510
510 287
510
510 287 500
500 280
500
- 29 -
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
temperature, room temperature,
and heat exchanger temperature.
RAS-35J2KVSG-ND
Heating
Fan speed
(rpm) (rpm)
771 1200 852
771 1170 836
732 1050 732
686 900 607
607 800 525
525 700 442
401 650 401
385 580 343
343 550 314
300 530 300
294 520 294
287 510 287
287 510 287
280 510 287
280 500 280