Gree EVO Serie Manual De Instrucciones página 4

Unit Control
5. The high pressure is detected by the sensor installed at the discharge pipe of the compressor, the low
pressure is detected by the sensor installed at the suction pipe of the compressor, and the enthalpy-adding
pressure is detected by the sensor installed at the enthalpy-adding pipe. The first one is mainly used for high
pressure protection, the second one is mainly used to control defrosting, freeze protection and superheating
degree, and all of three are used to together to control the intermediate pressure ratio of the compressor. When
any of these sensors fails, it will be displayed at the controller, all loads will stop. Among them, the water pump
will stop 120 seconds later than the compressor. Then, the main unit will resume normal running when this error
is eliminated.
6. The entering water temperature of the plate heat exchanger is detected by the sensor installed at the
inlet pipe of the plate heat exchanger, which is mainly used for freeze protection. When this sensor fails, this
error will be displayed at the controller but the unit will resume normal operation.
7. The leaving water temperature of the plate heat exchanger is detected by the sensor installed at the
outlet pipe of the plate heat exchanger, which is mainly used for freeze protection at the water side. When this
sensor fails, this error will be displayed at the controller but the unit will resume normal operation.
8. The auxiliary heater leaving water temperature is detected by the sensor installed at the outlet pipe
of the auxiliary heater, which is mainly used to control the leaving water temperature of the main unit. When
this sensor fails, this error will be displayed at the controller, all loads will stop (the 2-way electric valve will be
closed).
9. The hi-pressure switch is used to judge the system pressure. When the pressure is too high, this switch
will disconnect and the unit will shut down.
10. The flow switch of the main unit is mainly used to judge the water flow. When the flow rate is too low,
this switch will disconnect, and all loads will stop. This error will be displayed at the controller and will be
unrecoverable. The unit can restart only when it is repowered on and this error does not be displayed again.
Items from 1~10 listed above are control parameters input by the main unit.
11. 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 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.
12. 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 the
run mode set by the wired controller.
13. 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.
Items 11~13 are control parameters input by the filed installed equipment.
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