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7.3. Fan Speed control
The input labelled
FAN SPEED
controls the unit’s Fan Speed.
The DIP switch 2-4 determines whether the input type is voltage (0-10V) or resistance (
Ω
), see chapter 4.8 for more
details.
FAN
SPEED
Input
Fan
Speed
Voltage
(V)
Resistance
(k
Ω
)
0.1
–
2.0
0.0
–
2.0
Low
2.0
–
3.0
2.0
–
3.0
Uncontrolled
3.0
–
4.5
3.0
–
4.5
Mid
1
4.5
–
5.5
4.5
–
5.5
Uncontrolled
5.5
–
7.0
5.5
–
7.0
Mid
2
7.0
–
8.0
7.0
–
8.0
Uncontrolled
8.0
–
10
8.0
–
10
High
Above
10
Above
10.0
Uncontrolled
When the MelcoRETAIL MINI powers up it will read the
FAN SPEED
input and the fan speed will be determined based
on data in the table above. A command will then be sent to the indoor unit to set the fan speed accordingly.
If the
FAN SPEED
input changes such that a new fan speed band is entered, a command will be sent to the indoor unit
to change the fan speed accordingly. There is 0.1V / 0.1k
Ω
hysteresis applied to each band change to prevent rapid
changes to the fan speed.
When LOCK mode is enabled (see chapter 4.4) the command to set the fan speed will be sent every 5 seconds. This
will effectively revert any changes made via a local wall controller.
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