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October 30, 2020

Diagnosis of Heat Pump Gas Leakage

Air Source Heat Pump

Refrigerant, also known as gas, plays the role of heat absorption and transfer of heat in the air source heat pump system.

After a long period of use, users may encounter some common problems with the heat pump, such as, obviously observing the machine takes a long time to produce hot water or runs a long time to maintain the temperature constant, etc.


There is great possibility that refrigerant leakage happens and it decreases the efficiency of machine. Just please self-diagnose it by simple steps as below:There is a great possibility that refrigerant leakage happens and it decreases the efficiency of the machine. Just please self-diagnose it by simple steps as below:


1. Feeling the Temperature of Exhaust Air

Normally, after running for 15 minutes, the exhaust air should be 8 -10 °C lower than ambient temperature. If the temperature difference is larger than 11 °C, the refrigerant might be insufficient.


2. Observing the Drainage Hole of the Unit

There is usually condensing water coming out from the drainage hole after running for 30 minutes. Otherwise, the great possibility that the machine is lack refrigerant.


3. Observing the Finned Heat Exchanger

Under normal circumstances, when the ambient temperature is above 7 °C, the finned heat exchanger will have condensation water, but not frost; if there is unreasonable frosting (part of the finned heat exchanger has frost on it, part of it not), there may be insufficient refrigerant;


4. Observing the Heating Time of the Machines

Under normal circumstances, the water temperature rises 1 °C for heating for 3-4 minutes (the heating time might vary subject to the water tank volume, here we take 150L volume for example), if the heating time difference is too large, it may be insufficient refrigerant;


5. Observing the Connection of the Refrigerant Valve

Normally, there will be no lubricating oil at the valve connection. If there is, it is possible to be caused by refrigerant leakage;


6. Observing Whether the Wired Controller Reported Low-pressure Protection Failure

If yes, great possibility that the refrigerant leakage causes low pressure in the gas-circulating system.


When the refrigerant leakage is diagnosed, just contact the professionals to check and refill the gas.


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NEW ENERGY is a professional and leading heat pump manufacturer established in 2003. As a specialist in Swimming Pool Heat Pumps, House Heating Heat Pumps, Heat Pump Water Heaters and Heat Pump Dryers in China, NEW ENERGY has been focusing on the heat pump industry for over 19 years. NEW ENERGY has two production bases with 13 automatic production lines, 16 international certified (Intertek, SGS, Kiwa) labs and 44 advanced material test machines. The total production capacity is over 2 million sets per year. Also, NEW ENERGY has built up a complete heat pump industrial chain with its own main components factories, such as the sheet metal factory and water tank factory. Meanwhile, New Energy is the strategic partner of Mitsubishi and Emerson (Copeland). NEW ENERGY owns the first world-class academician workstation of heat pump research for the Chinese Academy of Engineering. It has two research institutes, China Heat Pump Research Center and China Heat Pump Training College, which have become the largest incubation centers of innovative technologies for the new energy industry in Asia. As one of the member companies that participated in drafting the Chinese national standards of...
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