Fault diagnosis method for high and low voltage inverter DCDC

The invention discloses a fault diagnosis method for a high and low voltage inverter DCDC. The fault diagnosis method comprises the steps that faults of a high and low voltage inverter DCDC module are divided into voltage faults, temperature faults and current faults; carrying out fault monitoring on the DCDC module of the high and low voltage inverter and judging the fault type of the monitored fault; judging the component generating the fault according to the fault type, and executing according to a preset fault processing strategy; and for the voltage type fault, the temperature type fault and the current type fault, after the component generating the fault is confirmed, the component generating the fault is replaced. 本发明公开了一种高低压逆变器DCDC的故障诊断方法，包括：将高低压逆变器DCDC模块的故障分为电压类故障、温度类故障和电流类故障；对所述高低压逆变器DCDC模块进行故障监测并对监测到的故障判断故障类型；根据故障类型判断产生故障的元器件，并按照预设故障处理策略执行；对于所述电压类故障、所述温度类故障和所述电流类故障，在确认产生故障的元器件后，更换故障元器件。