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.
4) Cold draft prevention, the fan
speed is controlled by temperature
of the indoor heat exchanger (TC)
as shown in Fig. 6.
(Fig. 3)
(Fig. 4)
Cold draft preventive control
(Fig. 6)
* No limitation while fan speed MANUAL mode is in stability.
* A: When Tsc
≥
24, A is 24, and when Tsc < 24, A is Tsc
Tsc: Set value
H (WE)
Line-approximate
M+and SUL with TC.
SUL (W2)
Stop
46
46
TC
34
45
45
33
33
33
21
32
32
20
*A+4
*A+4
*A+4
*A-4
*A-4
*A-4
Fan speed MANUAL in starting
Fan speed AUTO in stability
Fan speed AUTO in starting
Fan speed setup
HEAT ON
AUTO
YES
NO
MANUAL
TC
≥
42 C
Min air flow rate control
Tc
52
51
42
41
Limited to Min WD tap
* Fan speed =
(TC –
– W8) + W8
No limit
*
Fan speed
Basic fan control
TSC
b
- 0.5
c
- 1.0
d
- 1.5
e
- 2.0
f
- 2.5
g
- 5.0
L+ (W9)
*1
*2
*3
M+(WD)
*1: Fan speed = (M +
−
L+) x 1/5 + L+
*2: Fan speed = (M +
−
L+) x 2/5 + L+
*3: Fan speed = (M +
−
L+) x 3/5 + L+
*4: Fan speed = (M +
−
L+) x 4/5 + L+
(Calculated with linear approximation from M+ and L+)
TA-Tsc [°C]
Hi Power
*4
H(WE)
M(W8)
*5
*6
*7
*8
- 5.5
*5: Fan speed = (H
−
M) x 1/5 + M
*6: Fan speed = (H
−
M) x 2/5 + M
*7: Fan speed = (H
−
M) x 3/5 + M
*8: Fan speed = (H
−
M) x 4/5 + M
(Calculated with linear approximation from H and M)
L
L+
M
M+
H
W8
(L + M) / 2
WB
(M + H) / 2
WE
Indication
Fan speed Hi-POWER
W9
(L + M) / 2
WD
(M + H) / 2
WF
(Fig. 5)
FILE NO. SVM-18048
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