Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

Page: 183 / 315

Service
- 181 -
‘19 • HM-T-340
Operation control function by the outdoor unit control
Outdoor fan control
＜ FDCW60VNX ＞
1) Relations between Fan speeds and revolutions
Fan speed (rpm)
1st 2nd 3rd 4th 5th 6th 7th 8th
FDCW60VNX Revolutions Cooling
150 225 485 520 570 685 740 850
Heating 150 225 485 520 570 685 800 850
2) Control of fan motor speed
(a) Starting fanmotor speed is fi xed by the fanmotor speed excepted below case (i)
(i) Operation mode is “cooling” and Tho-A
＜
22
℃
Fan speed Control duration
1
1℃≦
Tho-A
＜
22
℃
2nd 30second after “Compressor ON”
Tho-A
＜
11
℃
1st 30second after “Compressor ON”
If Tho-A changed the condition during 30second, Fan speed does not change.
(
ii
) Othe
r
than case (i)
Follow the table (2).(b)
(b) Control of the fan motor speed in normal mode
Fan speed (rpm)
OFF 1st 2nd 3rd 4th 5th 6th 7th 8th
Compreassor speed
(rps)
Cooling 0 - - - 0
-
22 22
-
30 30
-
58 58
-
80 80
-
Heating 0 - - - 0
-
30 30
-
38 38
-
78 78
-
90 90
-
※
Fan motor speed down actually delays 60 second from the time that the each change command occurs.
Once the increase command is active even if it is within the above 60 seconds,the fan speed is increased promptly.
※※
When fan motor speed command “OFF” is active, fan motor speed is controlled 0 rpm promptly without delay.
3) Stop fanspeed control.
Fan stop control shows as follows.
①
Fan motor stops after fan 6th speed is operated T minutes.
T (minutes)
Cooling 1min
Heating 1min
4) Fan speed control during cooling operation
a) Ambient air temperature (Tho-A) is below 25
℃
.
Fan motor speed operates theUp-Down control according to heat exchanger temperature (Tho-R).
Tho-R Fan speed
Tho-R
≦
21
℃
Decreased by 1 speed
21
℃
< Tho-R
≦
38
℃
Retained
38
℃
< Tho-R Increased by 1speed