K series of mine ventilator fans suitable for multi-joint operation DK40 fan, is a series-parallel multi-level multi-fan ventilation system ideal stations stations fan levels. 1, choose a larger motor or reduce the load capacity. 2. Check the fuse, switch contacts, troubleshooting. 3, removal of grease and dust duct. 4, to take measures to cool. 5, professional maintenance of the stator winding. 6, with a voltmeter, multimeter, check motor input of the power supply voltage. Fans coal safety certificate | mine fan (certified) | Yuxi fans by Zibo Blower Limited. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) is an industry leader in Shandong Zibo, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Zibo Blower leadership with the staff warmly welcome all inquiries negotiations to create a better future Zibo Blower.