Mitsubishi Heavy Industries FDE40ZMXVG Technical Manual page 390

(c) Relationship between compressor speed and outdoor unit fan speed
Outdoor unit fan speed is controlled according to the operation mode (Heating/cooling) and the compressor speed.
Fan speed
Cooling
FDC71
Heating
Cooling
FDC90
Heating
(d) Outdoor fan control at low outdoor temperature
(i) Cooling
Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 30 seconds while the
1)
Detail of operation: After the outdoor fan operates at A speed for 60 seconds; the corresponding outdoor heat
2)
Outdoor heat exchanger temperature = < 21ºC
a)
After the outdoor fan speed drops (down) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is
lower than 21ºC, gradually reduce the outdoor fan speed by 1 speed. (Lower limit 9th speed)
21ºC < Outdoor heat exchanger temperature = < 38ºC
b)
After the outdoor fan speed maintains for 20 seconds; if the outdoor heat exchanger temperature is 21ºC-38ºC,
maintain outdoor fan speed again.
c) Outdoor heat exchanger tempeature > 38ºC
After the outdoor fan speed rises (up) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is higher
than 38ºC, gradually increase outdoor fan speed by 1 speed. (Upper limit 15th speed)
Reset conditions: When either of the following conditions is satisfied
3)
a) The outdoor air temperature (TH2) is 25ºC or higher and fan speed is 15th speed.
b) The compressor command speed is 0 rps.
4) Outdoor unit fan speed and fan motor speed
Fan speed 9th speed 10th speed 11th speed 12th speed 13th speed 14th speed 15th speed
FDC71 150
FDC90 200
(ii) Heating
Operating condition: When the outdoor air temperature (TH2) is 4ºC or lower continues for 30 seconds while the
1)
Detail of operation: The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed)
2)
Reset conditions: When either of the following conditions is satisfied
3)
a) The outdoor air temperature (TH2) is 6ºC or higher.
b) The compressor command speed is 0 rps.
(e) Outdoor fan control at overload
(i) Cooling
Operating condition: When the outdoor air temperature (TH2) is 41ºC or higher continues for 30 seconds while the
1)
Detail of operation: The outdoor fan is stepped up by 3 speed. (Upper limit 8th speed)
2)
Reset conditions: When either of the following conditions is satisfied
3)
a) The outdoor air temperature (TH2) is 40ºC or lower.
b) The compressor command speed is 0 rps.
1st speed 2nd speed 3rd speed
– –
– –
– – 0-30
– – 0-30
compressor command speed is other than 0 rps.
exchanger temperature shall implement the following controls.
¡ Value of A
Outdoor temperature > 10˚C
Outdoor temperature < = 10˚C
175 200 225
225 250 275
compressor command speed is other than 0 rps.
compressor command speed is other than 0 rps.
-
4th speed 5th speed
– 0-22 22-30
– 0-30 30-38
30-46 46-64
30-46 46-70
Outdoor fan
12th speed
9th speed
305 385
300 400
375
-
'15 • PAC-T-236
6th speed 7th speed
30-58 58-80
38-78 78-90
64-70 70-75
70-90 90-
Unit: min -1
485
500
Unit: rps
8th speed
80-
90-
75-
–