Gree GMV5E Series Service Manual page 256

GREE
3.2.2. Compressor Replacement
Step 1: Disconnect power supply.
Turn off the power switch of the ODUs and disconnect the line of the power supply and the power
line of the ODUs. Meanwhile, cover the power line with tape for insulation and put a warning sign beside
the power switch to prevent electric shock.
Step 2: Check oil quality.
Before releasing the refrigerant, get some freezing oil through the oil checking valve. Connect a
rubber hose to the oil checking valve at one end and a glass container at the other end. Open the oil
checking valve. Control oil flow speed. Since the oil is a mixture of volatile refrigerant and lubricant, DO
NOT cover the container; or it may explode.
After the lubricant is fully gasified, record the volume of oil.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
252