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7.2. Mode control
The input labelled
MODE
controls the unit’s Operating Mode.
The DIP switch 2-4 determines whether the input type is voltage (0-10V) or resistance (
Ω
), see chapter 4.8 for more
details.
MODE
Input
Operating
Mode
Voltage
(V)
Resistance
(k
Ω
)
0.1
–
2.0
0.0
–
2.0
Fan
2.0
–
3.0
2.0
–
3.0
Uncontrolled
3.0
–
4.5
3.0
–
4.5
Heat
4.5
–
5.5
4.5
–
5.5
Uncontrolled
5.5
–
7.0
5.5
–
7.0
Cool
7.0
–
8.0
7.0
–
8.0
Uncontrolled
8.0
–
10
8.0
–
10
Auto
Above
10
Above
10.0
Uncontrolled
When the MelcoRETAIL MINI powers up it will read the
MODE
input and the operating mode will be determined based
on data in the table above. A command will then be sent to the indoor unit to set the mode accordingly.
If the
MODE
input changes such that a mode band is entered, a command will be sent to the indoor unit to change the
mode accordingly. There is 0.1V / 0.1k
Ω
hysteresis applied to each band change to prevent rapid changes to the
mode.
When LOCK mode is enabled (see chapter 4.4) the command to set the mode will be sent every 5 seconds. This will
effectively revert any changes made via a local wall controller.
Note: When the voltage on all four analogue inputs decrease below 0.1V (or if the resistance increases above
100k
Ω
(i.e. open circuit)) the unit will enter a failsafe state and the Mode will be set to AUTO. See section
8.
Failsafe AUTO
Mode
for more details).
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