Outdoor Unit Fan Control; Outdoor Unit Fan Tap And Fan Motor Speed; Fan Tap Control During Cooling/Defumidifying Operation; Fan Tap Control During Heating Operation - Mitsubishi Heavy Industries FDT Series Technical Manual

(4)

Outdoor unit fan control

(a) Outdoor unit fan tap and fan motor speed
Model
71
100
125, 140
(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(6)
zone Tap 5(6)
zone Tap 4
zone Tap 3
Note (1) Value in ( ) is for the model 71.
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
Note (1) Value in (
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
Cooling/Dehumidifying
Heating
zone zone zone
Tap 5(6) Tap 5(6)
Tap 5(6) Tap 4(6)
Tap 4 Tap 3
Tap 3 Tap 2
zone
zone
46 48
30 37
Outdoor air temp. (˚C)
zone zone zone
Tap 3 Tap 4
Tap 4(5) Tap 5
Tap 5 Tap 6
) is for the model 71.
zone
zone
12 15
9
zone
10
Fan motor tap
speed speed speed
200 400 600
200 400 600
speed speed speed
200 350 600
200 350 600
speed speed speed
200 370 560
200 370 560
• Silent mode only
zone
Tap 4 zone
Tap 3 zone
Tap 2 zone
Tap 1 zone
zone
zone
20 30
Outdoor unit heat exchanger temp. (˚C)
• Silent mode only
zone
zone Tap 3
zone Tap 3
zone Tap 4
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
-10min -1
20
Outdoor unit heat exchanger temp. (˚C)
- 322 -
'12 • PAC-T-173
speed speed speed
710 810 850
710 810 850
speed speed speed
740 820 870
740 820 870
speed speed speed
640 745 870
640 800 870
zone zone zone
Tap 5 Tap 5 Tap 5
Tap 5 Tap 5 Tap 3
Tap 4 Tap 3 Tap 3
Tap 3 Tap 3 Tap 2
zone
zone
43 53
33 40
zone zone
Tap 3 Tap 3
Tap 3 Tap 5
Tap 5 Tap 6
zone
3
Outdoor unit fan speed
+10min -1
30
-1
Unit: min
speed
950
950
speed
950
950
speed
910
910
zone
Tap 4
Tap 3
Tap 2
Tap 1