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Item
2. Indoor fan
motor control
Operation flow and applicable data, etc.
<In heating operation>
Description
1) When setting the fan speed to L,
L+, M, M+ or H on the remote
controller, the operation is per-
formed with the constant speed
shown in Fig. 3 and Table 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. 5 according to the set
temperature and room temperature.
3) Min air flow rate is controlled by
temperature of the indoor heat
exchanger (Tc) as shown in Fig. 4
for prevent high temperature of heat
exchanger.
4) Cold draft prevention, the fan speed
is controlled by temperature of the
[In starting and in stability]
(Fig. 3)
(Fig. 4)
(Fig. 5)
Cold draft preventive control
(Fig. 6)
L
L+
M
M+
H
W8
(L + M) / 2
WA
(M + H) / 2
WE
Indication Fan speed
Fan speed setup
HEAT
ON
AUTO
YES
NO
MANUAL
TC ≥ 107.6ºF (42 C)
Min air flow rat
e
c
ontro
l
Tc ºF (ºC)
Limited to Min WD tap
*Fan spee
d
=
(
TC
–
–
W8
)
+ W
8
N
o
limi
t
*
Fan spee
d
A
U
T
O
Basic fan control
* No limitation while fan speed MANUAL mode is in stabilit
y.
* A: When Tsc ≥ 75°F (24°C), A is 75°F (24°C), and
Tsc: Set value
b
c
d
e
f
g
L+ (W9)
M+ (WD)
*1
*2
*3
H
(
WE
)
H
(
WE
)
Linear-approximate
H and S
U
L with Tc
.
SUL
(
W2
)
Stop
115 (46) 115 (46)
T
c
93 (34)
*A+4 *A+4 *A+4
*A-4 *A-4 *A-4
Fan speed MAN
U
AL in startin
g
Fan speed AUTO in stabilit
y
Fan speed AUTO in startin
g
*1: Fan speed = [(M+)
− (
L+)] x 1 4 + L+
*2: Fan speed = [(M+)
− (
L+)] x 2 4 + L+
*3: Fan speed = [(M+)
− (
L+)] x 3 4 + L+
(Calculated with linear approximation from M+ and L+)
Ta °F [°C]
TSC
-1.0 (-0.5)
-2.0 (-1.0)
-2.7 (-1.5)
-3.5 (-2.0)
-4.5 (-2.5)
-9.0 (-5.0)
-10.0 (-5.5)
°F (°C)
113 (45) 113 (45) 91 (33)
91 (33) 91 (33) 70 (21)
90 (32) 90 (32) 68 (20)
when Tsc < 75°F (24°C), A is Tsc
FAN AUTO
FAN Manual
In starting
• Until 12 minutes passed after operation start
• When 12 to 25 minutes passed after operation
start and room temp. is 5.4°F (3°C) or lower than set temp.
• Room temp. < Set temp. -7°F (– 4°C)
In stability
• When 12 to 25 minutes passed after operation start
and room temp. is higher than [set temp. -5.4ºF (–3°C)]
• When 25 minutes or more passed after operation start
• Room temp. ≥ Set temp. -6.3°F (–3.5°C)
5) In order to prevent Cold draft when
compressor sto
p during heating
operation. Then louver will move to
upper position and fan speed will
reduce or off.
FILE NO. SVM-10019
126 (52)
124 (51)
108 (42)
106 (41)
indoor heat exchanger (Tc) as shown
in Fig. 6 for keep warm temperature
of air flow.