Controller
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1. Control system
1.1) Brief introduction about controlling system
The control system adopts modular design, that is, all indoor units communicate with
outdoor units, refer to the following figures for the control structure between indoor units and
outdoor units. In the structure, the indoor control board receives the information from users (for
exam. set temp., fan speed etc.) and environment (ex, indoor coil temp., indoor temp. etc.) ,and
organize it to control the action of relevant parts such as EXV, four-way valve etc , then
transmits the signals to outdoor control board through the following communication circuit.
Outdoor main control board can deal with the information from indoor unit and figure out the
best running mode, and then transfer the instruction to the outdoor Slave units and indoor units
to carry out it.
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