Maintenance method of common failures of snowflake ice machine
1. Failure phenomenon: the compressor works but does not cool. Cause of failure: refrigerant leakage or two-way solenoid valve damage is not tightly closed. Maintenance method: make up the leak after leak detection, add refrigerant or replace the solenoid valve
2. Failure phenomenon: The compressor has been working for cooling, the water pump has been working for pumping water, and the ice cubes have become thicker, but it cannot always enter the de-icing procedure to drop the ice automatically. Causes of failure: The water temperature measuring probe is faulty, so that the intelligent control system cannot effectively sense the water temperature and work, misjudge the program error, or the controller is faulty. Maintenance method: use a multimeter to measure the resistance of the water temperature probe (when the water temperature in the water tank is close to 0 ° C, unplug the three-core wire in the control box and test the resistance of the two wires on both sides), for example, the resistance is at 27K Above, it is judged that the controller is bad and should be replaced. If the resistance value is lower than 27K, you must disconnect any one of the two wires and adjust the resistance value between 27K and 28K by way of series resistance.
3. The machine enters the de-icing procedure (the water pump stops working and the compressor stops cooling), but the ice cubes do not fall off. Cause: The two-way solenoid valve is damaged. Maintenance method: replace the solenoid valve body or outer coil.
4. The water shortage light is on but the machine does not automatically feed water. Cause of failure: The valve does not open when there is no water in the pipeline or the inlet solenoid valve is faulty. Maintenance method: Check the water intake of the pipeline. If there is no water, open the water channel and restart the machine. Replace the water inlet solenoid valve if it is faulty.
5. The compressor works but the water pump has not been working (no running water). The cause of the failure: the water pump is damaged or the internal scale of the water pump is blocked. Maintenance method: clean the pump or replace it.
The working principle of snowflake ice machine
1. The chilled water pump of the water storage tank continuously circulates through the plate or grid evaporator.
2. After the compressor is in operation, it is suctioned-compressed-exhausted-condensed (liquefied)-throttled-and then evaporated in the evaporator at a low temperature of -10 to -18 degrees. Continuously condenses into ice on the surface of the evaporator at a lower temperature. When the ice condenses to a certain thickness, the evaporation temperature of the refrigerant reaches the set temperature of the temperature control. Deicing. Then realize the next cycle.
The above article is provided by Shanghai Yuming Instrument, which is a high-tech company dedicated to refrigeration and photocatalysis
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