Unit Control
16. The leaving and entering water temperature of the solar panel and also the solar panel
temperature are detected by sensors installed at the inlet pipe, outlet pipe and solar panel of the solar
system respectively. Theses sensors are mainly used to control the water pump of the hot water of the
solar system. When the entering water temperature sensor fails, this error will be displayed at the
controller and the unit continues normal operation. When other two sensors fail, this error also will be
displayed at the controller and the water pump of the solar system will stop.
17. The remote room temperature is detected by the sensor installed at the room, which is mainly
used to control the input capacity of the compressor through room temperature setting. When the main
unit is controlled through the room temperature and this sensor fails, all loads except the water pump of
the solar system and the electric heater of the water tank will stop. However, when the main unit is
controlled through the leaving water temperature, if this sensor fails, this error will be displayed but the
main unit will resume normal operation.
18. Only when the control function of the thermostat has been activated through the wired controller,
then the thermostat can switch run modes among cooling, heating and shutdown, otherwise, the unit will
run as per the run mode set by the wired controller.
19. The gate control function can be set to be ―On‖ or ―Off‖ at the function setting page of the wired
controller. When this function has been activated and it is detected that the gate control card has been
drawn out, the unit will shut down and will tell any key operation of the controller is invalid. Then, if it is
detected that the gate control card has been inserted in, the unit will resume normal operation.
20. The flow switch of the solar system is mainly used to judge the water flow. When the flow rate is
too low, the flow switch will disconnect and immediately the water pump of the solar system will stop.
This error will be displayed at the controller and is unrecoverable. When this error is cleared, upon power
on again, the unit will restart.
Items 15~ 20 are control parameters input by the filed installed equipment.
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