In modern industrial production, the choice of cooling equipment directly impacts both efficiency and cost control. As a professional industrial chiller manufacturer, QUMAL understands this critical need and is committed to providing the highest quality solutions for our customers.

QUMAL's air cooled screw chiller stands out for its exceptional cooling performance and reliability, making it ideal for a wide range of industrial applications. Whether it's maintaining consistent temperatures in large manufacturing facilities or protecting precision equipment, QUMAL's air cooled screw chiller delivers energy-efficient, dependable service.

By choosing QUMAL, you're not just getting an industrial air cooled chiller; you're gaining a comprehensive, one-stop service experience. From initial needs analysis and custom product design to installation, commissioning, and ongoing maintenance, our team is with you every step of the way, ensuring your equipment performs reliably even in the harshest environments.

Our customers span various industrial sectors, and with our extensive experience and deep expertise, QUMAL has helped numerous companies reduce energy consumption while enhancing production efficiency. As your industrial chiller supplier, QUMAL is committed to delivering exceptional product quality and dedicated after-sales support to safeguard your operations.

Choosing QUMAL means more than just acquiring equipment—it means selecting a trustworthy partner who will help make your production more efficient, economical, and sustainable.

The rated working condition of the cooling water required by the chiller is 30~35°C. The high water temperature and poor heat dissipation will inevitably lead to high condensation pressure. This phenomenon often occurs in high temperature seasons. The reason for the high water temperature may be: cooling tower failure, such as the fan is not turned on or even reversed, and the water distributor does not turn, which means that the temperature of the cooling water is high and rises rapidly; the external temperature is high, the waterway is short, and the amount of circulating water In this case, the cooling water temperature is generally maintained at a relatively high level, which can be solved by increasing the water storage tank.

2. The cooling water flow is insufficient and cannot reach the rated water flow:

The main performance is that the pressure difference between the inlet and outlet of the unit becomes smaller (compared with the pressure difference at the beginning of the system's operation), and the temperature difference becomes larger. The cause of insufficient water flow is the lack of water or air in the system. The solution is to install an exhaust valve at a high place in the pipeline to exhaust; the pipeline filter is clogged or too fine, and the water permeability is limited. Regularly clean the filter screen; the water pump is selected to be small and does not match the system.

3. Condenser scaling or blockage:

Condensed water is generally tap water, which is easy to scale when the temperature is above 30°C, and because the cooling tower is open and directly exposed to the air, dust and foreign matter can easily enter the cooling water system, causing the condenser to be dirty and blocked, and the heat exchange area is small , the efficiency is low, and it also affects the water flow. The performance is that the water pressure difference between the inlet and outlet of the unit and the temperature difference become larger, the temperature of the upper and lower parts of the condenser is very high when touched by hand, and the copper tube of the condenser liquid outlet is hot. The unit should be backwashed regularly, and if necessary, chemical cleaning and descaling should be carried out.

4. Too much refrigerant charge:

This kind of situation generally occurs after maintenance, and the performance is that the suction and discharge pressure and the balance pressure are high, and the operating current of the compressor is also high. Under the rated working condition, the air should be released according to the suction and exhaust pressure, balance pressure and operating current until it is normal.

5. The refrigerant is mixed with air, nitrogen and other non-condensable gases:

This kind of situation usually occurs after maintenance and the vacuuming is not complete. It can only be drained, re-evacuated, and re-charged with refrigerant.

6. False alarms caused by electrical failures:

Because the high-voltage protection relay is damp, poor contact or damaged, the electronic board of the unit is damp or damaged, and the communication failure causes false alarms. For this kind of false fault, the high-voltage fault indicator light on the electronic board is often off or dimly lit, the manual reset of the high-voltage protection relay is invalid, and the operating current of the measured compressor is normal, and the suction and discharge pressure are also normal.

7. The evaporation pressure is too low:

It may be that the evaporation pressure of the water-cooled chiller is too low due to insufficient refrigerant. Common reasons: Insufficient cooling water; less cooling load; throttle orifice failure (only makes the evaporation pressure low); the heat transfer tube of the evaporator is deteriorated due to scale and other pollution (only makes the evaporation pressure too low); Insufficient (only makes the evaporating pressure too low).

8. The oil pressure difference is too low:

If the compressor oil pressure is too low, the compressor will stop running. The common reasons are: the oil filter is clogged; too much refrigerant is mixed in the lubricating oil.

9. Oil temperature is too high:

If the oil temperature of the refrigeration compressor is too high, long-term operation will reduce the quality of the refrigeration oil and even carbonize the refrigeration oil. Common causes: the cooling capacity of the oil cooler is reduced; the supply of refrigerant for cooling the oil cooler is insufficient due to the blockage of the refrigerant filter.

10. Main motor overload:

Unbalanced power supply phase voltage; large power line voltage drop;

The introduction of various industrial chillers and common fault handling are relatively complicated. Generally, specific analysis is made according to the specific problems of the situation. It is recommended to judge according to the actual situation or contact the industrial chiller manufacturer to solve the problem.

The compressor is the core component of the industrial chiller. Although the brand compressor we use has a long life, in actual use, if the user does not carefully maintain and maintain the compressor of the industrial chiller, it will also cause problems. Failures of varying degrees will seriously affect the performance of the entire industrial chiller. Preventing compressor failure in industrial chillers is therefore critical to maintaining reliable operation and minimizing downtime. Here are some effective measures to prevent compressor failure:
1. Routine inspections: During the use of industrial chillers, you need to always pay attention to the problem of compressor operating noise. If the noise increases significantly, according to the experience introduced by the factory cooler factory, shutdown inspections need to be completed in a timely and effective manner. , on the basis of ensuring normal operation, complete the maintenance work of industrial cooler compressors. Note: Once the compressor makes noise, you need to be more vigilant. Often small problems can cause complex and serious faults in the later period, such as compressor fluid shock.

2. Regular maintenance: Implement a comprehensive maintenance plan for the chiller system, including routine inspections, cleaning, lubrication and component inspections. Follow the manufacturer's recommendations for maintenance intervals and procedures.

3. Monitor the refrigerant level: Make sure the chiller has the correct refrigerant charge. Low refrigerant levels can cause the compressor to work harder, leading to overheating and potential failure. Regularly check and maintain proper refrigerant levels according to system specifications. During use, the specific values of the pressure gauge of the industrial chiller need to be paid attention to at any time. If there is a large-scale abnormality, careful inspection is required at this time. The specific inspection method can be completed according to the relevant methods introduced by the domestic industrial chiller manufacturer. Check the process to avoid pressure problems that affect the specific working efficiency of the compressor of the industrial chiller, causing an increase in electricity consumption and increasing the energy consumption of the industrial chiller. Note: Chiller pressure gauge, including high pressure pressure gauge, low pressure pressure gauge, etc.
4. Clean condenser and evaporator coils: Dirty coils will reduce heat transfer efficiency, resulting in increased compressor workload and higher operating temperatures. Clean your condenser and evaporator coils regularly to remove dirt, dust and debris that has accumulated on their surfaces.

5. Maintain proper oil level and quality: Compressor oil lubricates and cools the compressor’s internal components. Monitor oil levels regularly and refill or replace oil as needed. Make sure the oil used is of the type and quality recommended for the cooling system.

6. Check the electrical connections: Loose or faulty electrical connections may cause excessive current, causing the compressor to overheat and malfunction. Regularly check and tighten electrical connections to ensure electrical components are intact.

7. Monitor operating parameters: Install a monitoring system to continuously monitor key parameters such as compressor discharge temperature, suction pressure, and motor current intensity. Set alerts or alarms to notify operators of any abnormal conditions so timely intervention and corrective measures can be taken.

8. Adequate airflow and ventilation: Make sure there is proper airflow and ventilation around the chiller. Poor airflow can cause the compressor to overheat. Remove any obstructions and regularly check and clean the air filter to maintain optimal airflow.

9. Avoid frequent cycles: Try to reduce the frequency of starting and shutting down the chiller, as frequent cycles will put extra pressure on the compressor. Maintain as stable operating conditions as possible to reduce compressor workload.

10. Train personnel: Provide appropriate training to chiller operators and maintenance personnel on chiller operation, maintenance procedures and troubleshooting techniques. Well-trained personnel can detect potential problems early and take appropriate measures to prevent compressor failure.

By implementing these measures, you can significantly reduce the risk of compressor failure and extend the life of your industrial chiller system. Additionally, it is recommended to consult the industrial chiller manufacturer’s guidelines and recommendations for specific maintenance procedures and precautions.