GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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Step3: Check oil quality.
、
When system‘s internal pressure drops to 0.01Mpa (1.45psi),get some 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.
Step 4: Release refrigerant.
Refrigerant should be released from the high pressure side and low pressure side at the same time.
If it is released from one side only, the scroll is sealed, causing the refrigerant to fail to be released
completely. Control the release speed (it is expected to release for 12 hours or more). If too fast,
massive lubricant will be discharged with the refrigerant. Make sure to mark the valves.
NOTE
：
When releasing the refrigerant, if system‘s internal pressure drops to 0.01Mpa (1.45psi),
perform Step 4—Check oil quality.
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