A special team shall be set up for warehouse management. Special attention shall be paid to waterproof, moisture-proof, hot gas, cold running and fluorine escaping. Ice, frost, water, doors and lights shall be strictly controlled.

1. If there is ice, frost and water on the walls, floors, doors, ceilings and other parts of the hall and warehouse, it shall be removed in time.

2. The cooling fan in the warehouse shall be swept and defrosted in time to improve the refrigeration efficiency and save electricity. There shall be no ponding in the water pan of the cooling fan.

3. Hot goods that have not been frozen shall not enter the frozen goods cold storage room to prevent damage to the cold storage and ensure the quality of goods.

4. The door of the cold storage shall be well managed, and the goods shall be closed in and out. The damaged door shall be repaired in time, so that it can be opened flexibly and closed tightly without escaping cold.

warehouse management

1. In order to protect the floor and prevent frost heave and damage, it is not allowed to directly lay the goods on the floor to freeze, uncouple or remove the plate, and it is not allowed to fall and hit on the floor, and it is not allowed to reverse the stack and remove the pile.

2. The weight of commodity stacking and hanging rail shall not exceed the design load.

3. For the cooling material cold storage room without floor anti freezing measures, the floor frost heave shall be prevented during use.

4. The use of buildings shall be comprehensively inspected regularly, and problems found shall be repaired in time. The electrical circuits in the warehouse shall be regularly maintained to prevent leakage, and the lights in the warehouse room shall be turned off.

Commodity storage and sanitation

1. The cold storage shall strengthen commodity storage and sanitation, pay attention to commodity maintenance, strictly implement the food hygiene law, ensure commodity quality and reduce dry consumption loss. A full-time quality assurance officer (storekeeper) shall be assigned to check the quality of goods in and out of the warehouse, and the warehouse shall meet the requirements of food hygiene.

2. Strictly control the shelf life of the goods in the warehouse, conduct regular inspection and first in first out. In case of any change in the goods, issue the quality inspection sheet in time and deal with it quickly together with the owner.

The following goods can only be warehoused after selection, sorting or change of packaging. The following commodities shall not be warehoused:

1. Deteriorated, rotten, smelly and unsanitary goods;

2. Fresh eggs soaked in rain or water;

3. Goods that are salted or soaked in salt water (except for warehouses and special warehouses that have been treated with anti-corrosion), goods that are not tightly packed, and goods that flow with juice and water;

4. Inflammable, explosive, toxic and chemically corrosive commodities.

Common problems and faults of cold storage equipment

1. Frequently check and confirm whether the voltage of the power supply meets the requirements. The voltage should be 380V ± 10% (three-phase four wire). When the cold storage equipment is not used for a long time, cut off the main power supply of the cold storage, and ensure that the refrigeration unit is not affected by moisture, dust and other substances.

2. The condenser on the refrigeration unit is easy to be contaminated and should be cleaned regularly according to the actual situation. To maintain good heat transfer effect. Good heat dissipation, good refrigeration. Do not stack sundries around the refrigeration unit;

3. The electrical equipment of the cold storage shall be protected from moisture to avoid electric shock caused by electric leakage.

4. The hinge, handle and door lock of the cold storage door shall be lubricated regularly according to the actual situation.

5. The maintenance of electrical equipment in the cold storage shall be operated by electricians or personnel who know how to use electricity. The power supply must be cut off for any maintenance to ensure safety.

6. Vibration shall be avoided during the operation of the refrigerator. In addition to increasing mechanical wear, vibration will also cause loosening or fracture of the connecting pipe on the unit. If abnormal noise is found during the operation of the machine, stop the machine for inspection and run it after troubleshooting. The protection functions of the refrigeration compressor unit have been set in advance without adjustment.

7. Regularly check whether the connecting pipes on the connecting pipes and valves of the refrigeration unit are firm and whether there is refrigerant leakage (generally, oil stains will appear at the leakage place). The most practical method of leak detection is: dip a sponge or soft cloth with detergent, rub and foam, and then apply it evenly to the place to be detected and observe for several minutes. If there is leakage, bubbles will appear. Mark the leakage place, and then conduct fastening or gas welding (maintenance by professional refrigeration staff).

8. Sundries shall not be stacked on the top (top plate) of the cold storage, otherwise the cold storage plate will be deformed and affect the thermal insulation performance, and the channels around the cold storage shall be kept unobstructed. Only by ensuring good heat dissipation can the refrigeration be good. The location of the cold storage shall be dry, clean, free of inflammables and explosives, and ensure that there are no potential safety hazards. Articles shall not be stacked in front of the evaporator (a certain gap shall be reserved) to avoid affecting the refrigeration effect.

9. If the air humidity is too high, the defrosting interval is long, and the storage temperature setting is abnormal, all these will cause the frost layer on the evaporator in the storage to thicken and the storage temperature will not drop. At this time, defrosting (defrosting) treatment shall be carried out. Observe in time and stop defrosting immediately when the frost layer disappears. Wait a moment before starting the device.

10. The temperature, temperature difference and other parameters in the cold storage shall be set according to the actual situation of the cold storage, and the parameters shall not be changed arbitrarily. The cold storage has been customized according to the user's requirements when leaving the factory. After understanding the technical parameters of the cold storage, set the parameters on the controller.

11. Frequent start-up of the compressor shall be avoided, and the interval time of each shutdown shall not be less than 6 minutes. If the oil level of the sight glass of the compressor drops or becomes dirty, it shall be added or replaced in time. Unqualified refrigerant oil with wrong brand and high water content caused by long-term exposure to the air shall not be added, otherwise it will cause high-temperature carbonization, low-temperature wax precipitation, motor insulation damage, system oil return difficulty and other faults. Always pay attention to the temperature changes at the compressor shell, body and cylinder head to determine whether the compressor operates normally. The refrigeration compressor unit does not need to be refueled under normal circumstances. If it is determined that it is necessary to add oil, the special oil for the compressor shall be added by professionals. The amount of oil shall be determined by professionals and shall not be added blindly.

12. Regularly check whether the power supply voltage is normal (three-phase four wire), and check whether the protection function of the main power switch is normal and effective.

Common faults and troubleshooting

1. 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 fails. (check the power supply and distribution box)

2. The cold storage does not cool or the cooling effect is poor. Check whether the condenser of the refrigerator is dirty. Check whether there is too thick frost on the evaporator in the warehouse. Check whether the refrigerant leaks (apply soapy water to the pipeline connection, and if bubbles are generated, it indicates that the refrigerant leaks). And ask professional personnel to supplement refrigerant and deal with the leakage. Check whether the sealing of the cold storage door is intact and eliminate it. Check whether the refrigerator of the cold storage works. 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 fails and replace it. Check whether there is enough clearance for the goods stacked in the warehouse and dredge it.

3. There is abnormal noise when the machine is running. Please stop the machine 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 damage of the contactor, the inflexibility of the iron suction moving parts, the dirt on the iron suction surface, etc. Please cut off the power and then press the iron suction of the contactor or remove the contactor for cleaning to eliminate the noise.

4. The refrigerator starts frequently or does not start for a long time, or does not stop for a long time, or stops before the storage temperature reaches.

A. Check whether there is dirt on the condenser. Poor heat dissipation will lead to too high condensation pressure of the refrigerator. In order to protect the compressor, the machine stops running under the action of the pressure controller. When the heat dissipation is good, press the black reset button on the pressure controller, and the machine can automatically resume operation. B. If the parameter setting of the controller is incorrect, just reset it. C. Poor refrigeration, please refer to fault 2. D. Temperature control failure.

E. Electrical damage.

5. After switching on, the distribution box of cold storage has no response, but the three-phase power supply is normal. Please check the zero line for 220V voltage. The parts of the cold storage (various valves and controllers) have been set, and there are no parts that users need to adjust.

6. The lights in the warehouse are not on. Please check whether the switch fails and whether the bulb is damaged. Cut off the power supply during inspection, and pay attention to the waterproof of the lamp when installing the lampshade.

7. When the ambient temperature is too high, after the refrigerator operates for a period of time, the storage temperature does not reach the set value and the refrigerator stops in advance. This is because the condensation 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. When the heat dissipation is good, press the black reset button on the pressure controller, and the machine can automatically resume operation. And check whether the water-cooled condenser has good heat dissipation. Do not arbitrarily adjust the set value on the pressure controller, otherwise the pressure controller will not protect the refrigerator.

8. The cold storage door is not tightly closed. Please adjust the distance between the hinge on the cold storage door and the door lock and the storage body. (the adjustment complexity should not be too large, otherwise the door switch will be very inflexible.

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