Gree GMV5 Series Service Manual page 183

Touch the upper
part of an electric
expansion valve
and you will feel
its vibration while
units are being
powered on
②Four-way valve: While this valve is normally running, the four copper pipes connected to it will suffer
different temperature. When a unit switches to act the valve, you will feel obvious vibration and hear
sound.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Here is the position of a 4-way
valve within a unit. DO NOT
touch it. The exhaust pipe it
connects with transmits
high-temperature refrigerant
which may scald you
Make sure the
coil is fixed
and firm
180