When the water cooler is newly purchased or left unused for a long time, please make sure that the motor is started and the cooling water is sprayed (from the OUTLET) before installing the welding machine (remember the sequence before and after), otherwise the motor will not start easily. Note that the idling time cannot exceed 30 seconds, otherwise the motor will burn out easily. When using the welding water chiller, if the motor runs normally, but the water output is too small or unable to output water, the air from the air compressor can be blown into the water outlet or inlet for 20 seconds, and the air in the pump can be discharged, and the problem can be improved. Reasons for the motor not rotating when using welding water cooler: a. The voltage is too low. b. The starting capacitor is burned out. c. The water pump is stuck, turn off the power switch, drive the air from the air compressor into the water inlet for 20 seconds, and rotate the pump for about 20 seconds; or extend the side plate hole into the wooden slat to rotate the fan a few times, and then turn on the power. Reasons for water pump leakage: impurities in the water wear out the seal ring in the pump. So please make sure: Use pure water or alcohol antifreeze!!! The inside of the machine needs to be kept dry and clean. Open the case every six months and use the air gun of the air compressor to clean up the internal dust to improve the heat dissipation performance and the life of the machine.