Gree GMV-Y36WL/A-T, Service Manual

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GREE Photovoltaic Multi VRF for North America
14
CONTROL
1
Units’ Control
1.1 Schematic
diagram of units’ control
1.2 Interpretation on the schematic diagram
1)
High pressure switch is used to identify system’s high and low pressure. When
pressure is too high, the switch will break off and send a signal to main board.
Main board will pass this signal to controller, where the error will be displayed, and
stop unit from working.
2)
High/low pressure sensor is used to test unit’s high/low pressure and send
real-
time data to controller, which will control each unit’s output according to the
control logic.
3) Temperature sensors are used to test the tube temperature of the unit and send
data to the controller, which will control each uni
t’s output according to the control
logic.