Air-source heat pump maintenance methods

Maintenance of air-source heat pumps is crucial to ensuring long-term stable operation and extending their service life.

The following are some basic maintenance methods:

1. Unit status inspection: Regularly inspect the unit, including listening for normal operation and observing the stable outlet water temperature.

2. Troubleshooting: Understand common faults and their causes. For example, a "whooshing" sound may be caused by defrosting or thermal expansion and contraction of the heat exchanger, while outlet water temperature fluctuations may be a normal phenomenon due to varying inlet water pressure.

3. Check the piping system: Ensure all valves in the system are open and drain pipes are unobstructed and free of blockage.

4. Check the power distribution system: Confirm that the power supply voltage is normal, that all power distribution screws are intact, that the wiring is correctly distributed according to the power distribution diagram, and that the bottom wires are properly connected.

5. Check the hot water unit: Ensure that all fastening screws and mechanical screws on the hot water unit are intact. After powering on, check that the control panel indicators and pressure gauge are functioning normally.

6. Pre-Startup Precautions: Each time you turn on the power switch of the air-source heat pump unit, wait at least 12 hours before resuming operation. Do not disconnect the power supply during short downtimes.

7. Daily Maintenance: The main power supply must be functional 24 hours a day, and the main power leakage circuit breaker must be inspected monthly. Check the controller display for normal operation and adjust the operating time and temperature. Record and correct any fault codes displayed on the control panel.

8. Cleaning and Descaling: Regularly clean the water filter to maintain clean water quality. For cleaning and descaling of the water-side heat exchanger, physical or chemical methods such as acid cleaning, softening water, and electronic induction water treatment can be used.

9. Professional Inspection and Cleaning: Have a professional inspector regularly check the power and electrical system wiring, water system fill, water tank safety valve, liquid level controller, and exhaust system. Clean the air-side heat exchanger to maintain good heat exchange performance.

10. Long-Term Shutdown Protection: If the unit is down for an extended period, drain the water from the unit pipes, disconnect the power supply, and install protective covers. Before resuming operation, perform a comprehensive inspection.

11. Temperature Sensor Inspection: If the actual outlet water temperature differs from the value displayed on the control panel, check the temperature sensor for proper contact.

12. Water Tank Cleaning: Depending on local water quality, clean the scale in the water tank regularly (generally every three months).

These maintenance measures can effectively improve the operational reliability and service life of your air-source heat pump. When performing any maintenance work, always follow the equipment manufacturer's instructions and safety guidelines to ensure safety and proper maintenance.