GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
227
Step 15: Fill refrigerant.
Before filling refrigerant, check its manufacturer, package, and print information. Besides, check
refrigerant pressure and quality against the saturation pressure / temperature list.
1
）
Measure and check the pressure of the entire refrigerant product against the saturation pressure
/ temperature list. Verify temperature parameter. If the difference between the actual temperature and
the parameter value is 3°C(5.4
℉
) or more, the refrigerant quality is unsatisfactory.
Open all valves in
order that the
vacuum pump
extracts air through
all the valves
If the
maintenance
work involves
multiple parts,
extract air of the
balance pipe
independently
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