Analysis of several abnormal phenomena during the use of laboratory ultrapure water devices

       Nowadays, laboratory ultrapure water devices are favored in various industries, and the application scope covers hospitals, university scientific research, quality inspection units, chemical plants, pharmaceutical factories, water quality monitoring centers, animal husbandry industries, water plants, disease control centers, and seed monitoring stations. , battery factory, LCD screen factory, precision circuit factory, dust-free product production and so on.

In the process of using laboratory ultrapure water equipment, various failure problems will inevitably occur with the increase of service life. It is necessary to eliminate and deal with common failures in time to operate normally. Let's talk about its common problems. faults and troubleshooting methods.

(1) The high-pressure pump does not start and cannot make water

①Check whether the power is off and whether the plug is plugged in

②Check whether the low-voltage switch is out of order and cannot be connected to the power supply

③ Check whether the water pump and transformer are short-circuited, or the circuit connection of the whole machine is wrong

④Check whether the high pressure switch or water level controller fails and cannot be reset

⑤Check whether the computer box is faulty (referring to the microcomputer type)

(2) The high-pressure pump works normally, but cannot make water

①The high pressure pump loses pressure

②The water inlet solenoid valve (four-sided valve) is faulty and cannot enter the water (no pure water and waste water)

③The pre-filter is blocked (no pure water or waste water or very little waste water)

④The check valve fails (there is waste water but no pure water)

⑤ The automatic flushing solenoid valve fails and cannot be effectively closed (always in flushing state)

⑥The computer box is faulty and cannot close the recoil solenoid valve (always in the flushing state)

⑦RO membrane blocking

(3) The high-pressure pump keeps running

①The pressure of the high-pressure pump is insufficient, and the pressure set by the high-pressure cannot be reached

②The check valve is blocked, and pure water does not come out

③The high voltage fails and cannot take off

(4) The high-pressure pump stops, but the waste water continues

①The solenoid valve (four-way valve) fails, and the water cannot be effectively cut off

②The computer box is faulty and the solenoid valve cannot be closed (referring to the microcomputer type)

③Check valve pressure relief (small waste water flow)

(5) After the water is full, the machine jumps repeatedly

①Lack of raw water pressure

②Check valve pressure relief

③High pressure switch or liquid level switch failure

④The system has the phenomenon of pressure relief

(6) The pressure tank is full, but pure water cannot flow out

①Pressure barrel release pressure (inflate until the water in the barrel just stops, about 3 kg of air pressure)

②Post activated carbon blocking

The above are the common faults and troubleshooting methods of laboratory ultrapure water devices. Users need to master the necessary theoretical knowledge, have relevant technical information, use the correct method of use, and master the skills of fault analysis before use, in order to improve the ability to analyze and solve faults .