In Heating Operation> (Heat Pump Model) - Toshiba RAS-M10SMUV-E Service Manual

Item
2. Indoor fan <In heating operation> (Heat pump model)
motor control
HEAT ON
Fan speed setup
AUTO
TC > 42˚C
NO
(Fig. 4)
Basic fan control
[ ˚C ]
TA
b
TSC
c
–0.5
d
–1.0
e
–1.5
f
–2.0
g
–2.5
–5.0
–5.5
*1: Fan speed = (M + –L) × 1
*2: Fan speed = (M + –L) × 2
*3: Fan speed = (M + –L) × 3
(Calculated with linear approximation from M+ and L)
[In starting and in stability]
• Until 12 minutes passed after operation start
FAN AUTO • When 12 to 25 minutes passed after operation
start and room temp. is 3°C or lower than set temp.
FAN Manual • Room temp. < Set temp. –4°C
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
YES
Min air flow rate control
Tc
52
51
42
41
* Fan speed =
(TC – (42 + a)) / 10 × (WD – W8) + W8
a : In up operation 1, in down operation 0
Fan speed
AUTO
L (W8)
*1
*2
*3
M+ (WD)
H (WE)
÷
4 + L
÷
4 + L
÷
4 + L
(Fig. 5)
In starting
(Fig. 3)
Fan speed
W8
(L + M) / 2
WA
(M + H) / 2
WE
Limited to Min WD tap
*
No limit
Tc
46 46
45 45
25 25
24 24
*A-1 *A-1
*A-4 *A-4
* 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
• When 12 to 25 minutes passed after operation start
and room temp. is higher than (set temp. –3°C)
• When 25 minutes or more passed after operation start
• Room temp. ≥ Set temp. –3.5°C
– 27 –
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.
Cold draft preventive control
34
H (WE)
33
Line-approximate
H and SUL with Tc.
21
20
*A-1
SL (W1)
*A-4
Stop
Fan speed MANUAL in starting
Fan speed AUTO in stability
Fan speed AUTO in starting
(Fig. 6)
In stability