screw air compressor use

Winter morning can not be started directly, need to preheat the boot, to prevent dry grinding, forced to open the opportunity to cause the frequency converter to report 0L2, fried contactless, burning the motor, reported high temperature, when the main page shows the temperature at minus ℃ when the operation, let the oil preheat, although the trouble point, adhere to the operating steps, the subsequent machine failure will not delay the field gas