DC INVERTER MULTI VRF CONTROL
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When there is only one indoor unit that is set to be master indoor unit, in that case, no matter if the master
indoor unit is firstly started, the conflict mode error will be warned by slave indoor unit once the mode of
slave indoor unit and the mode of master indoor unit conflict (except for turnoff mode of master/slave
indoor unit). And the unit will firstly run at the mode of master indoor unit
When there are multi indoor units that are set to be master indoor units, the unit will run at the mode of
master indoor unit with min. address code. When the indoor unit with min. address code changes to the
running status from turnoff status, modes of other master indoor units or slave indoor unit should be in the
same mode with it, or the conflict mode error will be warned. Therefore, when there are multi master
indoor units, set the address code from high to low according to priority.
DIP switch 4（I/O）——Collection point setting of ambient temp.; the setting is mainly used when there is
high differential between temperatures of air conditioning area and return air of the unit. The setting is
valid only when there is receiver and includes collection points setting of temperatures of return air inlet e
and receiver head. The factory setting is the collection points setting of temperature of return air
inlet( dialing the DIP switch to the “ON” position.
DIP switch 5（L/H）——High-low static pressure setting of fan; it includes high static pressure setting of
fan and low static pressure setting of fan, which should be adjusted according to the project.
Cautions:
1）.Code setting must be under off state of power.
2）. There is 3-bit, 4-bit or 5-bit DIP switch. 4-bit or 5-bit DIP switch is only applicable to ducted type
unit(including GMV Multi VRF ducted type units and ducted type split)
3）.；When the control setting is "L", the Master/slave and memory setting on the main board is invalid.
When the control setting is “I”, the code setting is valid.
4）. The dial-up position shall be at ON which means 0 or at opposite position which means 1.
Dial-upswitch at middle position is prohibited.
5）. After dialing up, please record address code of the unit （√）.
S7 function code S1 address code
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