▶ High temperature or high temperature failure to stop inferior oil or oil poor, lack of oil; The oil filter is blocked or the oil circuit is not smooth; Fan motor failure (contactor failure); Air filter blockage; Temperature sensor failure; The cooler has poor heat dissipation or the heat sink is blocked; Temperature control valve failure; The host is damaged. 

▶ Large oil consumption of the whole machine and high non-exhaust oil content: leakage of lubricating pipes or failure of seals; High oil content: whether the return pipe is smooth; Oil level is too high; Long-term low pressure operation; Oil failure; Oil emulsification or deterioration; Precision filter failure; Loading and unloading are too frequent. 

▶ Electrical fault whether the electrical part works normally (high voltage, low voltage, bad contactor); Motor failure; The power switch is in poor contact. Non-overload shutdown: high temperature shutdown, power failure, loose wiring, loop relay or insurance failure. Overload shutdown: exhaust pressure is too high, thermal relay failure, lubricating oil viscosity increases, main motor failure, motor or contactor wiring loose, host failure, set value is too small.