The burning of pump caused by pipe blockage of water chiller for CNC engraving machine

Customers who know S&A water chillers clearly know that, the production process of S&A water chillers completely adopt mass-modularized production standard, each finished product has passed strict quality test before leaving the factory, and the service life of the water chillers can reach ten years under proper maintenance!
A customer of S&A Water Chiller in CNC engraving machine uses S&A CW-3000 water chiller. But the CW-3000 water chillers break down one by one in two years, and the cause of failure is that pipe blockage of water chiller results in burning of water pump, which confuses S&A!
Recently, the customer in CNC engraving machine called again, hoping to purchase pump components of S&A Water Chiller to replace the failed components of original water chillers. This time, S&A Water Chiller decided to take the initiative to find the cause of pump burning!
Through careful inquiry, S&A Water Chiller found that, the circulating water chiller of the customer used auxiliary cooling liquid, but this kind of cooling liquid is not the special cooling liquid used for automobile machine suggested by S&A, but the cooling liquid used for metal cutting.
According to the experience of S&A Water Chiller, if the cooling liquid used for metal cutting is added into the circulating cooling water of water chiller, after long-term use, the cooling liquid will form oil clot, which will lead pipe blockage of water chiller, increase operating load to water pump and then cause failure of water chiller. So, the [chief culprit" is found out finally!
Genuine knowledge comes from practice. If it is needed to add cooling liquid to S&A water chiller, please add the cooling liquid used for automobile engine according to the proportion stipulated on the specification, so as to exert the function of cooling liquid and improve the cooling effect of water chiller.
The technical parameter of CW-3000: http://Products/ChillerCW300050Wradi.html