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4. Hold Register (Holding Register) Query Function Code 0x03 Control Function Code
0x06/0x10
WORD name range remark
0
indoor
unit 1 set
temp.
16 - 30
Returns to 0x7FFF if the corresponding indoor
unit does not exist.
Unit 1 °C
The air conditioner read operation acquires the
current operation mode and the write operation
changes the operation mode.
There is no set temperature for HRV1/HRV2/
Fresh air unit , the read operation returns to 0 and
the write operation is invalid.
1
indoor
unit 1
operation
mode
air conditioning/HRV with coil:
1
‐
cooling
2
‐
heating
3
‐
dehumidifying
4
‐
fan only
5
‐
auto
HRV1/HRV2/Fresh air unit:
1
‐
no mode
2
‐
recovery
3
‐
by-pass
4
‐
inner loop
5
‐
auto
Returns to 0x7FFF if the corresponding indoor
unit does not exist.
The read operation gets the current run mode.
The write operation changes the operation mode
and writes the mode that is not supported by the
corresponding model.
Wiring diagram and Installation
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