Outdoor Unit Fan Control - Mitsubishi Electric FDT125VNVF Technical Manual

(4)

Outdoor unit fan control

(a) Outdoor unit fan tap and fan motor speed
Model
100-140
200, 250
Notes (1) Fan motor speed for model 200 and 250 are same for both top and bottom lines
(2) Value in ( ) are for the model 125, 140.
(3) Value in ( ) are for the model 250.
(b) Fan tap control during Cooling/Defumidifying operation
Fan taps are selected depending on the outdoor unit heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Note (1) It is detected by Tho-R1 or R2, whichever the higher.
zone Tap 5
zone Tap 5
zone Tap 4
zone Tap 3
zone
zone
15 18
(c) Fan tap control during heating operation
Fan taps are selected depending on the outdoor unit heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Note (1) It is detected by Tho-R1 or R2, whichever the lower.
zone Tap 3
zone Tap 3
zone Tap 4
zone
3
Outdoor air temp. (˚C)
(d) Outdoor unit fan control at cooling low outdoor air
1) When all the following conditions are established after the start of compressor, the following control is implemented.
If the outdoor air temperature (Tho-A) is in the zone
seconds from the start of outdoor unit fan and the outdoor unit fan is at the tap 1 speed, the outdoor unit fan speed is
controlled according to the outdoor unit heat exchanger temperature (Tho-R1, R2).
Note (1) It is detected with Tho-R1 or R2, whichever the higher.
zone
5
Outdoor air temp. (˚C)
Mode
Cooling/Dehumidifying
Heating
Cooling/Dehumidifying
Heating
zone zone zone
Tap 5 Tap 5
Tap 5 Tap 4
(1)
Tap 4 Tap 3
(1)
Tap 3 Tap 2
zone
zone
46 48
30 37
Outdoor air temp. (˚C)
zone zone zone
Tap 3 Tap 4
Tap 4 Tap 5
(1)
Tap 5 Tap 6
zone
zone
12 15
9
zone
10
➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed
200 350 600
200 350 600
➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed
200 370 560 (600)
200 370 560 (600)
Note (1) If the "silent mode start" signal is received from the remote controller,
zone
the speed changes from Tap 4 to Tap 3.
Tap 4
Tap 3
Tap 2
Tap 1
zone
zone
20 30
Outdoor unit heat exchanger temp. (˚C)
Note (1) If the "silent mode start" signal is received from the remote controller, the speed changes
from Tap 4 to Tap 3.
zone
1
zone
-2 0
Outdoor unit heat exchanger temp. (˚C)
in the cooling/dehumidifying mode, it has elapsed 20
Retained
Outdoor unit fan speed
-1
-10min
20
Outdoor unit heat exchanger temp. (˚C)
319
- -
Fan motor tap
740 820 870
740 820 870
820 850 910
(3)
820 850 910
(3)
zone
zone
43 53
33 40
zone
3
Outdoor unit fan speed
-1
+10min
30
'12 • PAC-T-174
-1
Unit: min
910 (950)
(2)
910 (950)
(2)
950
950