Troubleshooting Methods of Water-Cooled Chiller

2022/07/14 ClassificationIndustry News 288

If the chiller is used for too long or not regularly maintained, some unforeseen failures will inevitably occur. Today, LNEYA refrigeration manufacturers share with you some of the more common troubleshooting methods.

Each water-cooled chiller will undergo a comprehensive performance test before leaving the factory, and will also be equipped with various safety protection devices, such as phase protection, low water level protection, water flow switch protection, pump overload protection, compressor overload protection, high and low voltage protection, etc. Avoid secondary damage caused by equipment failure. When the equipment fails, the corresponding protection device will issue a reminder and stop the operation of the chiller.

One of the common faults: reverse phase. When this fault occurs in the water-cooled chiller, phase protection will occur in time. The reason for the reverse phase: the water pump and the compressor are reversed. At this time, we can exchange any two phases in the power phase line. If it is a phase loss, we only need to use a multi-meter to measure whether the three-phase power supply is normal, and check whether the power cord is disconnected.

The second common fault: insufficient refrigerant, the indicator light is on. When the water temperature of the water-cooled chiller is above 5°C, and the low-pressure gauge pressure shows less than 2kg/cm2, it indicates that the refrigerant is insufficient. At this time, we must conduct leak inspections. If there are leaks, they should be repaired in time, and then replaced with a dryer. The filter is re-evacuated and the chiller is charged with the appropriate refrigerant.

The third common fault: poor heat dissipation leads to slow cooling or no cooling. If the condenser of the water-cooled chiller has poor heat dissipation, the compressor efficiency will be low, the operating current will increase, and the high pressure pressure will rise to 20kg/cm2. At this time, the compressor is tripped by high-pressure protection and stops running. At this time, it is necessary to check whether the circulating water of the cooling water tower is normal, whether the temperature of the cooling water is too high, whether the cooling water valve is fully opened, whether the condenser is dirty and blocked, etc. These problems are all After normal operation, press the reset button to operate normally.

The fourth common fault: whether the high and low pressure are normal. The second and third points above analyze in detail the pressure display of the compressor when the high pressure or low pressure is abnormal. Then when the compressor is running, the difference between high pressure and low pressure is small or equal, and there is a fault, then we need to check the compressor. If the valve plate itself is damaged or broken, stop running immediately and notify the supplier to send someone to deal with it.

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