Common Causes of Freezing and Cracking of Air Source Heat Pumps

In order to better use air source heat pumps in winter. We have summarized the reasons for freezing and cracking of air source heat pump units and anti-freezing measures for you.

Common causes of freezing and cracking of air source heat pump units:

1. When the temperature is lower than -5℃, if the air source heat pump is powered off for more than 4 hours, it is very likely that the heat exchanger will freeze and crack. Therefore, when it is judged that a long power outage may be required, the water in the air source heat pump, water pump, and outdoor air source heat pump pipelines should be completely drained to prevent the air source heat pump unit from freezing.

2. Due to the different machine designs of each manufacturer, some air source heat pump motherboards do not have antifreeze protection function. Once a fault occurs, it may cause the heat exchange tube to freeze and crack;

3. If the water flow switch is not installed or the water flow switch is short-circuited, it is very likely to cause the air source heat pump to freeze and crack;

Winter antifreeze measures for air source heat pumps:

1. Strengthen the insulation effect of the pipeline;

2. Do not easily cut off the power to the air source heat pump;

3. Add ethanol alcohol to the system water solution;

4. Condensed water should be properly handled in time;

5. Open the three-way inlet and outlet and install the drain valve;

6. Add antifreeze to the system;

7. Clean up debris and snow around the air source heat pump in time.