Recognition and correction common errors of cold storage below in a timely manner is extremely important to ensure the performance and longevity of the system. In this article, Tan Long Please share 17 common technical errors that occur during use. cold storage, with detailed troubleshooting instructions.
Common errors in cold storage – Machine is lacking or out of gas
The phenomenon of loss of refrigerant gas will cause cold storage gradually become less efficient. Lack of gas also causes the formation of snow particles on the pipes and leakage points, leading to errors in the control system or improper operation of the electric current.
To fix it, you need to quickly add gas or patch the leaks. If you have the technical skills, you can handle it yourself, otherwise, ask for help from professional repair units.
The operating system is making a loud noise.
Loud noise from cold storage systems is one of the common errors of cold storage. The cause may be excess gas, loose bolts or screws, pipes in contact with each other or with the machine housing.
To fix this, check and adjust the gas level, making sure there is no excess gas. Replace the appropriate compressor or faulty compressor parts. Make sure the screws and bolts are properly tightened. More complex repair techniques may also be required.
Cold storage is not cold even though the system is still working
This is a complex error, the cause may come from a gradual lack of gas, the gas pipe is clogged with dirt or foreign objects, the cooling air is not circulating, heavy loads or refrigeration compressor inactive.
To handle it, you need professional repair knowledge. Contact the repair units to measure the gas, check the pipes, clean and check the equipment. Or call 0933357058 Tan Long for timely support.
Block sometimes works sometimes doesn't
Block Not working or working intermittently is also one of the common errors of cold storage. Block not working may be due to loss of power supply to compressor, usually due to Control board circuit error, contactor not closed or open circuit. In case the block is not working continuously, it may be due to system overload, need to be reset and maintained.
High compression pressure
High compression pressure is a common error in cold storage system, often due to excess refrigerant, condenser dirty, or lack of air and cooling water. To fix, adjust the gas amount, maintain and clean condenser periodically, and remove obstructions to the cooling air flow.
Compression pressure too low
Low compression pressure Usually due to gas shortage or reduced compressor performance. Add the necessary amount of gas or ask professional repair units to maintain the system.
Compressor and fan stop working together
This is one of common errors of cold storage, the cause could be a short circuit, broken wire, or damage. temperature controller and compressor contactor. To fix, check the circuit, controller and wires, then repair or replace if necessary. Professionals should be consulted to handle the problem.
Air conditioner too cold
The reason why the air conditioner is too cold is often due to thermostat damaged or due to the temperature being adjusted too low compared to the usage needs. To fix this, you need to check the circuit of temperature controller and wires, then reset the temperature to suit your needs.
High suction pressure
High suction pressure There could be many reasons such as excess gas, inefficient compressor, incorrect sensor installation position or too heavy load.
To fix one of the common errors of cold storage this, you need to reduce the gas, check and improve the performance of compressor, readjust the sensor position, and re-evaluate the system load.
The machine runs and stops continuously.
The machine runs continuously but is not cold. It could be due to lack of gas, clogged gas pipe or condenser, dirty air filter, clogged condenser, non-condensing gas in the system, non-circulating cooling air, inefficient compressor, or overload.
To fix, check and charge gas, replace clogged parts, clean air filter and evaporator, check fan, maintain condenser, drain gas, vacuum, charge new gas, remove obstructions and check compressor performance.
Condenser fan not running
Continue the list common errors of cold storage is the condenser fan is not running. This can be due to many reasons such as short circuit or broken wire, thermostat broken, capacitor damaged or short circuited, contactor coil The fan is broken, or the fan motor is short-circuited or the case is damaged.
To fix this, you need to check the circuit with a multimeter, check the continuity of the wires and the temperature controller, check the capacitor with a multimeter, check the continuity of the coil and contacts, and check the insulation with a multimeter.
Evaporator fan not working
Evaporator fan not running It can be caused by short circuit or broken wire, damaged or short circuit capacitor, damaged fan contactor coil, or short circuit or short circuit of fan motor. How to fix:
- Check the capacitor with a meter to ensure proper operation.
- Check coil and contacts for continuity to detect and repair faults.
- Check insulation resistance with a meter to ensure safety during repair.
Compressor not working, but fan running
Compressor not running, fan running is one of the common errors of cold storage. The cause comes from short circuit or broken wire, thermostat damaged, capacitor damaged or short-circuited, compressor contactor coil damaged, compressor short-circuited or casing-touched, or compressor stuck. How to fix:
- Check the temperature controller circuit and wiring to detect and repair faults.
- Check the coil and contacts for continuity to ensure smooth system operation.
- Check insulation resistance with a meter to ensure safety during repair.
Machine not running
When the machine is not running, the cause may be no power supply, fuse or varistor blown, loose electrical connections, shorted or broken wires, tripped safety devices, or damaged transformers. To fix this, you will need:
- Check the power supply voltage to make sure the machine is receiving enough power.
- Check fuse size and type, replace if necessary.
- Check and tighten loose electrical connections.
- Use a multimeter to test the circuit and determine if there is a short circuit or broken wire.
Cold storage flooding error
The cause of one of common errors of cold storage It could be that the heat load in the cold storage is too high, the boiling process in the evaporator is overloaded, causing the vapor to carry liquid to the compressor (block). The expansion valve is opened too large or inappropriately, or when the cold storage is first started, there is liquid on the suction pipe or in the evaporator. In addition, the float valve controlling the evaporator liquid level is broken, causing liquid to overflow to the compressor.
To troubleshoot liquid flooding in cold storage systems:
- In case of slight flooding, users can fix it themselves by opening the air release valve, charging the evaporated refrigerant after heating the crankcase to 30°C, then starting to operate again.
- In case of severe flooding, it is best to contact the nearest cold storage repair center for help.
Cold storage floor swelling error due to freezing
When cold storage Long-term storage, cold air passes through the insulation panels to the ground, causing the water to freeze into ice. This process accumulates over time, causing the ice to become larger, leading to swelling of the ground and destroying the construction structure of the insulation panels.
To overcome this situation, technicians often:
- Create space under the insulation for floor ventilation
- Use resistor to dry insulation panels
- Use additional base ventilation ducts for the insulation panels.
Air leakage in cold storage
The phenomenon of air leakage into cold storage is considered one of the common errors of cold storage. This happens when the door is opened for inspection or shipment, outside air penetrates causing heat loss and affecting preservation. Hot air from outside enters the warehouse from above the door, cold air from the warehouse exits from below the floor, carrying moisture reducing system efficiency.
How to fix:
- Using a windbreak fan: Prevent outside air from entering the warehouse.
- Build buffer room: For large warehouses, create buffer rooms to block outside air.
- Using the archway: Use small door (600 mm x 600 mm) for loading.
- Using plastic screen: The plastic curtain is tightly sealed, cold-resistant, and ensures tightness when no one is coming or going.
Above is a summary of common errors of cold storage during use. Hopefully the sharing from Tan Long will provide useful information for readers who are learning about this issue. If you have any needs cold storage installation new, please contact 0933357058 with the company's technical department for more detailed advice.
