Check the power and wire connections: Ensure that the power cord of the circulating water vacuum pump is firmly connected and the socket is working properly. Check if the power switch is turned on to ensure normal power supply.

Check the water supply: Ensure that the water supply is sufficient and functioning properly. Check the water level in the sink to ensure that the water pump can absorb water normally.

Check the water pipe connection: Check if the water pipe connection is tight and there is no looseness or leakage. Ensure that the water pipes are not blocked or bent.

Check the status of the water pump: observe if there is any abnormal noise or vibration in the water pump. Check the water pump for water leakage. If there are any abnormalities, it is recommended to turn off the power and contact maintenance personnel.

Check the status of the water ring: Check the water level and water quality of the water ring. If the water level is too low or the water quality is not clean, it may be necessary to clean the water ring or replace the water.

Check seals and consumables: Check the condition of seals and consumables, such as O-rings, gaskets, filter elements, etc. If wear, aging, or blockage is found, replace it promptly.

Clean the filter: Check if the filter of the circulating water vacuum pump is blocked. If there is dirt accumulation in the filter, it can be cleaned or replaced.

Check control parameters: Check the control parameters of the circulating water vacuum pump, such as temperature, pressure, speed, etc. Ensure that the parameter settings are correct and adjust as needed.

If the above steps cannot solve the problem, it is recommended to contact the manufacturer or professional maintenance personnel for further diagnosis and repair. Before maintenance, please be sure to disconnect the power supply and strictly follow the relevant safety operating procedures. Timely troubleshooting and maintenance will help restore the normal operation of the circulating water vacuum pump.