Gree GUD24AH2/A-D - Wiring Diagrams and Handling Warnings; Indoor and Outdoor Unit Wiring Diagrams; High;Low Voltage Wire Handling Precautions

Air Handlers
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ķ. Before working, please check whether the indoor unit and thermostat are
powered on.
ĸ. Match the terminal numbers and wire colors with the colors indicated in the
indoor unit.
Ĺ. Wrong wire connection may burn the electrical components.
ĺ. Connect the wires firmly to the wiring box. Incomplete installation may lead to
fire hazard.
Ļ. Please use wire clamps to secure the external covers of connecting wires.
(Insulators must be clamped securely; otherwise, electric leakage may occur.)
ļ. Ground wire should be connected.
NOTE:
Y means Compressor control signal for the outdoor unit;
B which is energized under the heating mode means 4-way valve control
signal;