Outdoor Fan Control - Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual

(4) Outdoor fan control

(a) Outdoor unit fan tap and fan motor speed
Model
100-140 Cooling/Dehumidifying
Note (1) If the "silent mode start" signal is received from the remote control, the speed changes from 600 to 500.
(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
zone Tap 5
zone Tap 5
zone Tap 4
zone Tap 3
zone
30
zone
15 18
Outdoor air temperature (˚C)
(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
zone Tap 3
zone Tap 3
zone Tap 4
zone
12
zone
3 9
Outdoor air temperature (˚C)
(d) Outdoor fan control at cooling low outdoor air
i) 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 10
Outdoor air temperature (˚C)
Mode
➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed
200
Heating 200
zone zone zone
Tap 5 Tap 5 Tap 4
Tap 5 Tap 4 Tap 3
(1)
Tap 4 Tap 3 Tap 2
(1)
Tap 3 Tap 2 Tap 1
zone
zone
46 48
37
Note (1) If the "silent mode start" signal is received from the remote control, the speed changes
zone zone
Tap 3 Tap 4
Tap 4 Tap 5
(1)
Tap 5 Tap 6
zone
15
zone
Outdoor unit heat exchanger temperature (˚C)
zone
Outdoor unit fan speed
-10min -1
-
Fan motor tap
350 600 740
(1)
350 600 740
(1)
Note (1) If the "silent mode start" signal is received from the remote control,
the speed changes from Tap 4 to Tap 3.
zone
33
zone
20 30
Outdoor unit heat exchanger temperature (˚C)
from Tap 4 to Tap 3.
zone
zone
1 3
-2 0
in the cooling/dehumidifying mode, it has elapsed 20
Outdoor unit fan speed
+10min
Retained
20 30
Outdoor unit heat exchanger temperature (˚C)
327
-
'19 • PAC-T-327
Unit: min
820 870 950
820 870 950
zone
zone
43 53
40
-1
-1