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2024
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Domestic air source heat pump shutdown related matters
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When you need to shut down a domestic air source heat pump, here are some key points to note.
First, plan the downtime and reason in advance. If the shutdown is due to the end of seasonal use, make sure that the water in the system has been properly treated to prevent freezing and damage to the equipment in cold weather.

Before shutting down, the operating power of the heat pump should be gradually reduced to allow it to transition smoothly to the shutdown state. When turning off the power, follow the correct operating procedures to avoid damage to the equipment due to misoperation.
After shutdown, the equipment needs to be inspected and maintained. Clean the outside and surrounding environment of the heat pump and keep it well ventilated. Check whether the pipes are leaking, loose, etc., and repair them in time.
For key components such as heat exchangers, they should be carefully cleaned to remove dust and debris to ensure heat exchange efficiency when the machine is turned on next time.
If the shutdown is long, you also need to consider taking appropriate protective measures for the equipment, such as covering or placing it in a dry environment to prevent moisture or other external factors.
When restarting a domestic air source heat pump after a shutdown, it is crucial to ensure all preparations are completed to guarantee safe and efficient operation. Begin by inspecting the equipment thoroughly to confirm that all components are in good condition and free of damage or wear. Check the indoor unit to ensure that pipe connections are secure, properly aligned, and that all relevant valves are open for proper water or refrigerant flow. Inspect the electrical system to verify that the power voltage is stable and within normal limits, all screws are tightened, and wiring follows the correct diagram, with the earthing securely connected to prevent electrical hazards. Additionally, inspect the heat pump unit to ensure all screws, parts, and connections are intact, and that the unit is clean and free from obstructions. Once all checks are complete, power on the system and review the controller indicator for any failure notifications or abnormalities. Address any issues promptly before resuming regular operation to ensure the heat pump performs efficiently and reliably.
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