Outdoor Fan Control - Mitsubishi Heavy Industries FDF71VNXWVH Service Manual

(4) Outdoor fan control

(a) Outdoor fan tap and fan motor speed
Model
FDC100-140 Cooling/Dehumidifying
Note (1) If the "silent mode start" signal is received from the remote control and SW7-3 is ON, the speed changes from 600 to 500.
(b) Fan tap control during cooling/defumidifying operation
Fan taps are selected depending on the outdoor heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Note 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
zone
15 18
Outdoor air temperature (˚C)
(c) Fan tap control during heating operation
Fan taps are selected depending on the outdoor heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Note It is detected by Tho-R1 or R2, whichever the lower.
zone
zone Tap 3
zone Tap 3
zone Tap 4
zone
zone
zone
3
3 9
Outdoor air temperature (˚C)
Outdoor air temperature (˚C)
(d) Outdoor fan control at cooling low outdoor air temperature
(i) If the outdoor air temperature (Tho-A) is in the zone
with ±5 – ±30min
R2).
Note It is detected by Tho-R1 or R2, whichever the higher.
Mode
➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed
200
Heating 200
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
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
zone
zone
12 15
12 15
9
-1
to keep high pressure level which is controlled by outdoor heat exchanger temperature (Tho-R1,
zone
Outdoor air temperature (˚C)
-
Fan motor tap
350 600
(1)
350 600
(1)
Note (1) If the "silent mode start" signal is received from the remote control,
zone
the speed changes from Tap 4 to Tap 3.
Tap 4
Tap 3
Tap 2
Tap 1
zone
zone
20 30
Outdoor heat exchanger temperature (˚C)
from Tap 4 to Tap 3.
zone
zone
1
zone
zone
-2 0
-2 0
Outdoor heat exchanger temperature (˚C)
Outdoor heat exchanger temperature (˚C)
in the cooling/dehumidifying mode, outdoor fan is controlled
zone
20
194
-
'22 • PAC-SM-426
740 820 870
740 820 870
zone
zone
43 53
33 40
zone
zone
1 3
3
Unit: min -1
950
950