faq
Product support
The Conventional System

A, The conventional system has R/RC, G, Y, W (or W2), C wire in general.


B, If it is lack of G wire, it means the fan function integrates into the conventional system, for example the Heat Type is Electric under some situations.


C, If there are both Rc and Rh in the system, and the wall plate only has R terminal, it should put the Rc and Rh wire together with the R terminal, the wall plate has also Rc and Rh terminal, it should separate connection.

The Heat Pump System

A, The Heat Pump system has R/RC, G, Y, O (or B or O/B), C wire in general,


B,  If the system is with Emergence Heat or Auxiliary Heat, 


Firstly, the wire (E wire or W) should connect the W terminal


Secondly, choose the heat type. If the device model is TJ919B, it should choose “Heat Pump” and tick the option “AUX/EMG Heat Installed” in the heat type interface. 


Thirdly, enable the function. If the device model is TJ225, there is an option Emergency Heat in the mode interface. If the device model is TJ919, there is an option button under the Heat mode icon in the mode interface, it needs to click the button to enable the emergency heat. If not enable the emergency heat, but connect the W wire that means has the auxiliary heat function, it will turn on automatically after the heat keep on working 10 min.


C,Distingue the conventional system and heat pump system based on whether exits O wire or B wire or O/B wire. 

D,If the system has O wire or B wire, then the system must be Heat Pump, O wire or B wire connect the O/B terminal, but choose Heat Pump which kind the engaged in valve, it needs to pay attention to distingue that when it has O wire, it should choose engaged in Cool, when it has B wire, it should choose engaged in Heat.

Configuration the heat type method:

TJ610 series: Menu---->Activation----->enter “HT” or Menu----->Heating & Cooling------>Heat Setup


TJ919B: Menu------>Settings------>Advanced------->Heating Type


TJ225: Menu--------> Settings------>Advanced------->Heat Type

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