Indoor Fan Motor Control - Toshiba RAS-B10U2FVG-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-Tsc
[ °C ]
+2.5
a
+2.0
b
+1.5
+1.0 c
d
+0.5
e
Tsc
(table 1) Indoor fan air flow rate <Cooling>
Fan speed
RAS-B10U2FVG
level
Cool
Fan speed
(rpm)
WF 530
WE UH 530
WD H 500
WC M+ 450
WB 450
400
WA M
W9 360
W8 L+ 350
W7 L 300
L−
W6 260
W5 UL 260
W4 240
W3 SUL 240
W2 240
W1 240
Operation flow and applicable data, etc.
MANUAL
Indication Fan speed
L
L+ (L + M) / 2
M
M+ (M + H) / 2
H
*3 : Fan speed = (M + −L) x 3/4 + L
Fan speed Hi Power
*4 : Fan speed = (M + −L) x 2/4 + L
H+(WD)
M+(WC)
*5 : Fan speed = (M + −L) x 1/4 + L
*6
*3
(Linear appro ximation
from M+ and L)
*4 *7
*6 : Fan speed = (H −L+) x 3/4 + L+
*8
*5
*7 : Fan speed = (H −L+) x 2/4 + L+
L(W7) L+(W8)
*8 : Fan speed = (H −L+) x 1/4 + L+
(Linear appro ximation
from H and L+)
RAS-B13U2FVG
Series Series
Air flow rate Fan speed
(m3/h) (rpm)
498 560
498 560
468 540
414 490
414 490
366 440
324 390
315 390
258 340
216 270
216 270
198 250
198 240
198 240
198 240
(Fig. 1)
Hi-POWER
W7 W8
(L + M) / 2
WA WC
(M + H) / 2
WD WE
(Fig. 2)
RAS-B18U2FVG
Series
Air flow rate Fan speed Air flow rate
(m3/h) (rpm) (m3/h)
528 650 624
528 650 624
510 630 600
459 560 528
459 560 528
408
500 468
354 450 414
354 450 414
300 400 366
228 360 324
228 340 300
210 320 282
198 300 258
198 300 258
198 300 258
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FILE NO. SVM-18048
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.