Gree GMV-VQ680WM/C-X Service Manual page 361

Gree
pressure.
(3) Install the 4-way valve coil by referring to 5.1.8 Installing 4-way Valve Coil.
(4) Install other components.
(5) Fix the wires according to the original requirements. Refer to the unit wiring diagram.
(6) Make sure that the components and cables are properly connected.
(7) After checking that there is no problem, buckle the front panel and tighten the screws.
5.1.10 Removing and Installing Electronic Expansion Valve
Preparations
(1) Use the power circuit breaker to switch off the power of the GMV6 HR VRF system. Make
sure that the unit pipeline system is free of refrigerant.
(2) Remove the unit's upper and bottom panels by referring to 5.1.1 Removing the Unit
Panel.
Removing procedure
(1) Remove the damping block wrapped or rubber sleeve on the electronic expansion valve.
(2) Rotate the electronic expansion valve coil counterclockwise until it is released and then
remove it.
(3) Cut the electronic expansion valve inlet and outlet pipes to ensure that there is no
residual refrigerant in the unit. Remove the old electronic expansion valve.
(4) Weld and loosen the connecting tube of the electronic expansion valve and then pull the
connecting tube off.
Note:
When welding, do not get the other components burnt.
(5) Remove the old electronic expansion valve.
1 --- Damper block or rubber sleeve 2 --- Electronic expansion valve coil 3 --- Electronic expansion
Installation procedure
(1) Install the new electronic expansion valve to the exact position.
(2) Weld the connecting tube of the electronic expansion valve.
(3) When welding the electronic expansion valve, wrap the valve body with a damp cloth.
(4) Nitrogen protection should be applied. Refer to Table 1 for nitrogen pressure.
GMV6 HR DC Inverter VRF Units Service Manual
valve
359