Unit Control; Schematic Diagram - Gree LSQWRF35VM/NhA-M Service Manual

2 Unit control

2.1 Schematic diagram

Description:
(1) A water flow cutout is used to judge the water flow rate. When the flow rate is too low, it will trip off,
and the control board will send this signal to the display and the water pump. Then, the display will
tell there is an error, the water pump will stop and the unit will stop or will not start.
(2) A high/low pressure cutout is used to judge the system pressure. When the system pressure is too
high/low, it will trip off, and the control board will send this signal to the display. Then, the display
will tell there is an error and the unit will stop or will not start.
(3) An ambient temperature sensor is used to detect the temperature of the environment where the
unit is which will determine whether to start or stop the fan and determine the steps of the electric
expansion valve when initializing. When this sensor fails, the control board will detect and send this
signal to the display. Then, the display will tell there is an error and the unit will stop or will not start.
(4) A discharge temperature sensor is used to detect the discharge temperature. When the sensed
temperature is too high or this sensor fails, the control board will detect and send this signal to the
display. Then, the display will tell there is an error and the unit will stop or will not start.
Unit Control
Input
13