I The machine alarms and the water is normal---------------The water flow switch is broken or there are foreign objects in the pipeline II The water temperature does not drop ---------------------Check whether the side net and condenser are ventilated, and whether the fan emits hot air III The machine can't be refrigerated ---------------------Check whether the refrigerant leakage is caused by the leakage, and whether the compressor is working at the set temperature IV Abnormal noise from the compressor--------------The voltage is too low, it is easy to appear in summer V E2 alarm (high water temperature alarm) 1. The dust screen is blocked and the heat dissipation is poor 2. Poor ventilation at the air outlet or inlet, and poor heat dissipation around the welder water cooler  3. Unstable or low voltage 4. Improper setting of controller parameters 5. The chiller is switched on and off too frequently, and the interval should exceed 5 minutes 6. Excessive heat load, it is recommended to replace the chiller with large cooling capacity VI E5 alarm (water flow alarm) Please first check if the amount of water in the water tank is sufficient 1. Turn off the chiller, use a section of water pipe to short-circuit the water outlet and the water inlet, and then start the chiller to observe 2. If the alarm is cancelled after short-circuiting, it can be judged as an external waterway problem of the chiller. 3. It also alarms that the water pipe or pump is blocked by impurities inside. 4. It is also possible that the water flow switch is broken, and this probability is small.