Mitsubishi Heavy Industries FDUA160AVSAVH Service Manual page 31

(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 (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
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 (1) It is detected by Tho-R1 or R2, whichever the lower.
zone
zone Tap 3
zone Tap 3
zone Tap 4
zone
zone
3
Outdoor air temperature (˚C)
(d) Outdoor fan control at cooling low outdoor air temperature
(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 fan and the outdoor fan is at the tap 1 speed, the outdoor fan speed is controlled
according to the outdoor heat exchanger temperature (Tho-R1, R2).
Note (1) It is detected with Tho-R1 or R2, whichever the higher.
(ii) The outdoor heat exchanger temperature is detected always and, when the number of revolutions of the outdoor fan
speed has been increased or decreased, there is no change of fan speed for 20 seconds.
(iii) Range of the outdoor fan speed under this control is as follows.
1) Lower limit: 130min
2) Upper limit: 500min
(iv) As any of the following conditions is established, this control terminates.
1) When the outdoor air temperature is in the zone
established for 40 seconds or more continuously.
2) When the outdoor fan speed is 500min
for 40 seconds or more continuously.
3) When the outdoor heat exchanger temperature at 50°C or higher is established for 40 seconds or more.
zone zone
Tap 5 Tap 6
Tap 5 Tap 4
Tap 4 Tap 3
Tap 3 Tap 2
zone
zone
46 48
41 43
• Silent mode only
zone zone
Tap 3 Tap 4
Tap 4 Tap 5
Tap 7 Tap 7
zone
12 15
9
zone
Outdoor air temperature (˚C)
-1
-1
-1
and the outdoor heat exchanger temperature at 30°C or higher is established
-
• Silent mode only
zone zone
Tap 4 zone Tap 5
Tap 3 zone Tap 4
Tap 2 zone Tap 4
Tap 1 zone Tap 3
zone
zone
20 30
Outdoor heat exchanger temperature (˚C)
zone
zone Tap 3 Tap 3
zone Tap 3 Tap 3
zone Tap 3 Tap 5
zone
2
zone
-2 0
Outdoor heat exchanger temperature (˚C)
in the cooling/dehumidifying mode, it has elapsed 20
zone
5 10
and the outdoor heat exchanger temperature at 30°C or higher is
30
-
'21 • PAC-SM-398
zone zone
Tap 5 Tap 4
Tap 4 Tap 3
Tap 3 Tap 3
Tap 3 Tap 2
zone
zone
43 51
33 40
zone zone
Tap 3
Tap 4
Tap 6
zone
4
Retained
Outdoor unit fan speed
-10min
-1
20
Outdoor unit heat exchanger temperature (˚C)
zone
Tap 4
Tap 3
Tap 2
Tap 1
Outdoor unit fan speed
+10min -1
30