Specifications
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49
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(c) Operation control function by the outdoor controller
1) Control for outdoor unit fan
a) Cooling Operation
The speed of the fan for the outdoor unit is controlled by the temperature of the heat exchanger (Tho-R detection)
and the outdoor air temperature (Tho-A).
C Zone
D Zone
C Zone
D Zone
E Zone
B Zone
A Zone
FM02(Right)
OFF
Hi
Hi
OFF
Hi
FM
01(Left)
Hi
Hi
Hi
Hi
Hi
Fan motor
Zone
Description of control for fan for outdoor unit
B Zone
11
Outdoor air temperature (°C)
9
1917
E Zone
A Zone
-3
Heat exchanger temperature (°C)
0
C Zone
D Zone
b) Heating Operation
1 Stop control for outdoor fan
When the high pressure switch (63H2) operates, the fan for the outdoor unit is stopped to control the high
pressure switch.
63H2 settings : 2.79 OFF/2.26 ON (Mpa)
2 Tap control for outdoor fan
When the high pressure switch (63H2) is closed, the outdoor fan is controlled by the detected heat of the
outdoor heat exchanger thermistor (Tho-R) and the detected heat of the outdoor air temperature thermistor
(Tho-A).
Note (1) When the fan for the outdoor unit is started when the outdoor air
temperature is more than 12 °C, it will operate at high speed for 3
seconds and then switch to low speed. After operating a low speed
for 4 minutes, it will be transferred to controlled speed.
A Zone
B Zone
C Zone Zone
D Zone
FM
01
(Left)
Hi
Hi
Lo
Fan motor FM
02
(Right)
Hi
OFF
OFF
Description of control for fan for outdoor unit
D Zone
48
Heat exchanger temperature (°C)
44
C Zone
B Zone
25
Outdoor air temperature (°C)
20
A Zone
2) Snow protection fan control
If DIP switch SW5-2 on the printed circuit board for the outdoor unit is set to on, the fan on the outdoor unit which has
been stopped will operate for 10 seconds at Hi speed every 10 minutes when the outdoor air temperature is 3 °C or less.
3
Outdoor air temperature (°C)
5
Outdoor fan
operates
at Hi speed
Outdoor fan
stopped