-Daily maintenance items of 150 degree ultra-low temperature refrigeration unit

-The daily maintenance items of the 150 degree ultra-low temperature refrigeration unit need to be diversified, and only regular maintenance and inspection can make the unit run more stably and ensure high refrigeration efficiency and longer
service life in the process of use 。 1.
Use purified water or demineralized water as frozen circulating water before start-up; Clean and clean the water tank and piping system; And the pipeline and water tank are filled with the amount of water that meets the requirements for operation; Valves, filters, check valves remain fully open or adjusted as needed; 2.
Check whether the wiring of the unit is loose or the wiring is wrong; The unit is powered on, does not turn on, check whether the unit has a fault alarm, when the phase sequence alarm occurs, please check whether the external power supply is defective, or the voltage is too high / too low, or the phase sequence is incorrect; 3.
Temperature setting: set the required temperature value on the panel according to your needs, and press the OK button to confirm; Start-up sequence: pump → compressor; Shutdown sequence: compressor → pump
.
4.
If the compressor has large vibration and the pressure difference between high and low pressure gauges is small in the operating state, please check whether the compressor has reversal or phase loss; 5.
When the water pressure is no pressure, the water pressure is small, and the water flow is small, please check the large accumulation of air in the pump head, or the impeller is blocked, or the pipeline water supply is not smooth, or the filter is blocked; 6.
The condenser of the -150 degree ultra-low temperature refrigeration unit itself has poor heat dissipation, and the internal heat exchange tube may be dirty and need to be cleaned and cleaned; or poor environmental heat dissipation needs to improve environmental ventilation and heat dissipation; or excessive refrigerant charge; Or please check the outside world if it is too large to exceed the carrying capacity of the unit; or the cooling water flow is too small; 7.
Overload alarm of -150 degree ultra-low temperature refrigeration unit: overload alarm of compressor, pump and fan, check whether the wiring is loose; Contactor damage, thermal protector damage or small setpoint; Incoming defects; The supply voltage is too low; Damage to compressor, pump, fan motor body;