常见故障显示：

                                ERR1：   软件过流保护

                                ERR2：   硬件过流保护

                                ERR4：  欠压保护

                                ERR5：   过压保护

                                ERR6：   缺相保护

                                ERR7：  堵转/空转保护

                                ERR8：   启动失败