Maintenance knowledge and failure methods of small combined cold storage

Maintenance knowledge and failure methods of small combined cold storage

1. The cold storage door is not closed tightly. Please adjust the distance between the hinge and lock on the door and the storage body.

　　 2. The cold storage is not cooling or the cooling effect is poor. Check whether the condenser of the refrigerator is dirty. Check whether the frost is too thick on the evaporator in the warehouse. Check if the refrigerant is leaking (coat the pipe connection with soapy water, there are bubbles that indicate refrigerant leakage). And ask professionals to add refrigerant and deal with the leakage. Check whether the seal of the cold storage door is intact and eliminate it. Check whether the refrigerator in the cold storage is working. Check whether the parameter setting of the computer controller of the cold storage is correct and readjust it. Check whether the controller of the cold storage is malfunctioning and replace it. Check whether there are enough gaps for the items stacked in the warehouse and clear them.

　　3. The refrigerator starts frequently or does not start for a long time or stops when the refrigerator does not stop after a long time. A. Check whether there is dirt on the condenser. Poor heat dissipation will cause the condensing pressure of the refrigerator to be too high. In order to protect the compressor, the machine will stop running under the action of the pressure controller. After the heat dissipation is good, press the pressure controller. The black reset button, the machine can automatically resume operation. B. The parameter setting of the controller is wrong, just reset it. C. The refrigeration is not good, please refer to fault 2. D. The temperature control fails. E. The electrical appliance is damaged.

　　4. The cold storage distribution box does not respond after closing, but the three-phase power is normal. Please check the neutral line to see if there is 220V voltage. The parts of the cold storage (various valves, controllers) have been set, and there are no parts that users need to adjust.

　　 5. The lighting in the library does not light up. Please check if the switch is malfunctioning and the bulb is damaged. When checking, cut off the power supply and pay attention to the waterproof of the lamp when installing the lamp cover.

　　6. ​​When the ambient temperature is too high, after the refrigerator has been running for a period of time, the temperature of the refrigerator has not reached the set value and the refrigerator will be stopped in advance. This is because the condensing pressure of the refrigerator is too high due to the increase of ambient temperature. In order to protect the compressor, the machine stops running under the action of the pressure controller. After the heat dissipation is good, press the black reset button on the pressure controller, and the machine is Can automatically resume operation. And check whether the water condenser has good heat dissipation. Do not arbitrarily adjust the set value on the pressure controller, otherwise the pressure controller will not play the role of protecting the refrigerator.

　　7. Check the power supply: there is no power on the distribution box or the display screen does not display. Please check whether the special brake of the cold storage is malfunctioning. If the refrigerator starts frequently or does not start for a long time, or does not stop after a long time, or the storage temperature is not enough, stop.

　　 8. There is abnormal noise when the machine is running, please stop it and check whether it is caused by vibration or mechanical failure. There is abnormal noise in the distribution box. This is the sound made by the AC contactor. It is due to the inflexibility of the moving parts of the contactor. Please turn off the power and press the iron suction of the contactor to eliminate the noise. When the ambient temperature is too high, after the refrigerator has been running for a period of time, the storage temperature has not reached the set value and the refrigerator will be shut down in advance. This is because the condensing pressure of the refrigerator is too high due to the increase of ambient temperature. In order to protect the compressor, the machine stops running under the action of the pressure controller. After the heat dissipation is good, press the black reset button on the pressure controller, and the machine is Can automatically resume operation. And check whether the water condenser has good heat dissipation. Do not arbitrarily adjust the set value on the pressure controller, otherwise the pressure controller will not play the role of protecting the refrigerator.