Mitsubishi HMA100V Technical Manual page 140

B
C
3
Outdoor air temperature (°C)
b) Lower limit
Model
FDCW71VNX
FDCW100VNX
FDCW140VNX
2) Fan speed control during cooling operation
Fan speed is controlled every 15 seconds according to the outdoor heat exchanger temperature (Tho-R1,-R2), whichever
the higher.
Tho-R
Less than 30°C
30°C or higher but 45°C or lower
Higher than 45°C
3) Fan speed control during heating operation
According to the outdoor air temperature (Tho-A), fan speed control is switched between A and B.
Control A
[Control A]
Fan speed is controlled every 15 seconds according to the difference between the outdoor air temperature (Tho-A) and the
outdoor heat exchanger temperature (Tho-R1,-R2), whichever the higher.
(Tho-A)-(Tho-R)
Less than 3degC
3degC or more but 6degC or less
More than 6degC
[Control B]
Fan speed is controlled every 15 seconds according to the low pressure (LPT).
LPT
More than 1.1MPa
1.0MPa or more but 1.1MPa or less
Less than 1.0MPa
4) Snow protection fan control
If the dip switch (SW3-2) on the outdoor control PCB is turned ON, the outdoor fan is operated for 30 seconds at 740rpm
once in every 10 minutes according to outdoor air temperature (Tho-A) shown in below figure in the stop mode or
anomalous stop mode.
A
12
15
9
Operation Mode
Cooling
Heating
Cooling
Heating
Cooling
Heating
Fan speed
Reduced by 10 rpm
Increased by 10 rpm
23
Outdoor air temperature (°C).
Fan speed
Reduced by 10 rpm
Increased by 10 rpm
Fan speed
Reduced by 10 rpm
Increased by 10 rpm
Snow protection fan
control ON
3
Outdoor air temperature (°C)
Operation control function by the outdoor unit controller
c
-2
Heat exchenger temperature (°C)
Min.rpm
130
390
130
390
130
370
Retained
Control B
25
Retained
Retained
Snow protection fan
control OFF
5
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Service