Mitsubishi Heavy Industries FDTCVA SERIES Technical Manual page 178

(e) Outdoor unit fan control during cooling when the outdoor air temperature is low
( i) When cooling or dehumidifying, if the ambient air temperature (Tho-A) is in Zone B and when the outdoor unit fan
has run for 20 seconds since starting and is running at 1st speed, the outdoor unit fan speed is controlled in accordance
with the outdoor heat exchanger temperature (Tho-R1, R2).
Note (1) Whichever of the two readings, Tho-R1 or R2, is highest (Tho-R2 is used in models 802 and 1002 only).
Zone
-5 (5)
Ambient air temperature (˚C)
Note (1) Values in ( ) show in the case of the 302 model.
(ii) If the rotational speed in changed, the speed is held constant for 20 seconds, then if the conditions in (i) exist after 20
seconds, the speed is changed again.
• Speed lower limit: 130 rpm
• Speed upper limit: 400 (500) rpm
Note (1) Values in ( ) show in the case of the 302 model.
(iii) If any of the following conditions is established, this control ends and the fan runs at the fan speed set in item (d). (iii).
1) The ambient air temperature (Tho-A) is in Zone
detected to be 30°C or higher continuously for 40 seconds or longer.
2) The outdoor unit fan speed is 400 (500) min
to be 30°C or higher continuously for 40 seconds or longer.
Note (1) Values in ( ) show in the case of the 302 model.
3) The outdoor heat exchanger temperature (Tho-R1, R2) is detected to be 45°C or higher continuously for 40 seconds
or longer.
Zone
Outdoor unit fan speed
-10min
0 (10)
-1
, and the outdoor heat exchanger temperature (Tho-R1, R2) is detected
177
-
Retention
-1
20
Outdoor heat exchanger temperature (˚C)
and the outdoor heat exchanger temperature (Tho-R1, R2) is
-
Outdoor unit fan speed
-1
+10min
30