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西门子6RA70直流调速器维修常见故障：
速度不稳，不出力，输出电压低，烧可控硅，无励磁电压，烧保险，无显示,F031,F005,F068,F052，F004，FO11,F042等
西门子6RA70直流调速器维修型号：
6RA7018-6DS22-0 6RA7025-6DS22-0
6RA7028-6DS22-0 6RA7031-6DS22-0
6RA7075-6DS22-0 6RA7078-6DS22-0
6RA7081-6DS22-0 6RA7085-6DS22-0
6RA7087-6DS22-0 6RA7025-6GS22-0
6RA7031-6GS22-0 6RA7075-6GS22-0
6RA7081-6GS22-0 6RA7085-6GS22-0
6RA7087-6GS22-0 6RA7086-6KS22-0
6RA7013-6DV62-0 6RA7018-6DV62-0
6RA7025-6DV62-0 6RA7028-6DV62-0
6RA7031-6DV62-0 6RA7075-6DV62-0
6RA7078-6DV62-0 6RA7081-6DV62-0
6RA7085-6DV62-0 6RA7087-6DV62-0
6RA7025-6GV62-0 6RA7031-6GV62-0
6RA7075-6GV62-0 6RA7081-6GV62-0
6RA7085-6GV62-0 6RA7087-6GV62-0
6RA7086-6KV62-0