Common problems and solutions in the use of cooling water circulation units

the constant temperature cooling water circulation device is a coolant (commoncoolant for water, low temperature common synthetic coolant, such as glycol water solution, referred to as coolant or "water" ) as a heat transfer medium, it needs to cool the instrument or equipment generated heat transmission, through the cooling system to the outside of the equipment, so as to ensure that the equipment in the normal temperature range of operationThe device and the instrument equipment rely on the pressure of the water pump in the device to form a closed media cycle, by the temperature sensor to detect the temperature of the medium, the implementation of the control of the chillercooling water recycling device widely used a variety of experimental instruments and equipment such as: rotary evaporator, X-ray diffraction instrument, ICP emission spectrometer, ICP mass spectrometer, graphite furnace atomic absorption spectrometer, fluorescent analyzer, electron microscope, medical CT machine, medical physiotherapy equipment, production test equipment, precision grinder, CNC machine tools, processing center, laser equipmentwhen there are some failures in the cooling water circulation device, we can often solve the problemphenomenon according to some specific phenomena: the first power switch light is not on, the water pump does not turn- Possible causes and solutions:the air switch (circuit gate) above the power supply access end is in the "OFF" stateput the air switch in the "ON" state to resolve the problemphenomenon: the first power on or a long time not to turn on, the water pump does not turn or block, "water pump normal" indicator on, buzzer alarm- possible causes and solutions:the water pump inside a large amount of air or scale, or the pump for a long time does not cause the rotor lubrication to decline, making it difficult to start the pumpNeed to unplug the power supply, open the device cover, open the motor rotor directly behind the rubber round, with a word screwdriver against the motor rotor left and right activities, the motor can be restartedNote: The type of pump used by different devices varies, and the above method of removing and adjusting the pump may not be applicablephenomenon: water level alarm indicates flickering and buzzer alarm- possible causes and solutions:a) water shortage in the water tank and low water levelAdd water to over the level switch; b) the level switch is shorted or damaged Replace the level switch phenomenon: water flow alarm indicates flickering, buzzer alarm - possible causes and solutions: a) the pump is not turned on The button opens the water pump and b) the water flow circuit opens Check the circuit; c) the water pump is damaged Replace the water pump