Mitsubishi FDT125VNPWVH - Page 29

'22 • PAC-SM-412
-
28
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Unit:rps
Fanspeed 1st speed 2nd speed 3rd speed 4th speed 5th speed 6th speed 7th speed 8th speed
FDC
125
VNP-W
Cooling – – 0-21 21-32 32-44 44-49 49-70 70-
Heating – – 0-21 21-30 30-48 48-60 60-67 67-
(d) Outdoor fan control at low outdoor air temperature
(i)
Cooling
1) Operating conditions
Whenthe outdoor airtemperature(TH2)is 22ºCor lower continues for30seconds while thecompressor
speedisotherthan0rps
2) Detail of operation
AftertheoutdoorfanoperatesatAspeedfor60seconds;thecorrespondingoutdoorheatexchangertempera-
tureshallimplementthefollowingcontrols.
a)
Outdoorheatexchangertemperature
=
<
21ºC
Aftertheoutdoorfanspeeddrops(down)to1speedfor60seconds;iftheoutdoorheatexchangertempera
-
tureislowerthan21ºC,graduallyreducetheoutdoorfanspeedby1speed.
(Lowerlimit;TH2 >19ºC:15thspeed,0ºC
=
<
TH2
=
<
19ºC:10thspeed,TH2<0ºC: 9thspeed)
b)21ºC<Outdoorheatexchangertemperature
=
<
38ºC
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)
3) Reset conditions
Wheneitherofthefollowingconditionsissatised
a)Theoutdoorairtemperature(TH2)is25ºCorhigherandfanspeedis15thspeedormore.
b)Thecompressorspeedis0rps.
4) Outdoor fan speed and fan motor speed Unit:min
-1
Fanspeed 9thspeed 10thspeed 11th speed 12th speed 13th speed 14th speed 15th speed
FDC125VNP-W 150 200 225 250 300 390 550
(ii)
Heating
1) Operating condition
Whentheoutdoorairtemperature(TH2)is4ºCorlowercontinuesfor30secondswhilethecompressor
speedisotherthan0rps
2) Detail of operation
Theoutdoorfanissteppedupby2speedstepateach20seconds.(Upperlimit8thspeed)
3) Reset conditions
Wheneitherofthefollowingconditionsissatised
a)Theoutdoorairtemperature(TH2)is6ºCorhigher.
b)Thecompressorspeedis0rps.
(e) Outdoor fan control at overload
(i)
Cooling
1) Operating condition
Whentheoutdoorairtemperature(TH2)is39ºCorhighercontinuesfor30secondswhilethecompressorcommand
speedisotherthan0rps
2) Detail of operation
The outdoor fan is stepped up by 3 speed. (Upper limit 7th speed)
3) Reset conditions
Wheneitherofthefollowingconditionsissatised
a) The outdoor air temperature (TH2) is 38ºC or lower.
b)Thecompressorspeedis0rps.
15˚C < Outdoor air temperature
10˚C < Outdoor air temperature
<
=
15˚C
Outdoor air temperature
<
=
10˚C
15th speed
Outdoor fan
12th speed
10thspeed
●
ValueofA
(c) Relationship between compressor speed and outdoor fan speed.
Outdoorfanspeediscontrolledaccordingtotheoperationmode(Heating/cooling)andthecompressorspeed.