Refrigerator Model:HBC-70/200(India)40MAINTENANCE SERVICE AND TROUBLE SHOOTING⑧ Switch off motor.(3) Filling① Determine the filling quantity first according to the refrigerator beingrepaired. (Each small mark of the liquid tube is 25g, each big mark is 100g).② Open all related valves.③ When the liquid level has reached filling quantity, close valves.(4) Test run① After filling, turn on power to refrigerator for test run. Observe the unitoperation.② Switch off power.12.6 Refrigerator noise12.6.1 Refrigerator noise sourcesRefrigerator noise comes from the expanding with heat and contractingwith cold of compressor, evaporator or condenser; from the contacting orresonance of pipes; from the flowing of refrigerant; or from the vibration ofrefrigerator because the floor is not level, etc.PDF created with pdfFactory trial version www.pdffactory.com