中文
含义
控制板检测到电机转速反馈异常或测速信号丢失，洗衣机在洗涤或脱水过程中无法维持正常转速。
常见原因
- 测速传感器（tachometer）故障或引线断路/短路。2. 电机绕组短路或断路。3. 电机线束插头松动、氧化或接触不良。4. 控制板电机驱动电路损坏。5. 皮带传动型号 — 驱动皮带打滑或断裂。6. 电机转子卡滞（轴承磨损或异物卡入）。
自助排查
- 断电后手动转动滚筒，确认无机械卡阻。2. 检查电机线束插头是否插紧、端子无氧化。3. 用万用表测量测速传感器线圈电阻（通常约 100-300Ω），开路或短路则需更换。4. 测量电机主绕组电阻（参考机型维修手册标称值）。5. 对皮带传动型号，检查皮带张紧度及有无磨损、打滑痕迹。6. 若以上均正常，则为控制板故障，需更换控制板。
English
Meaning
The control board detects abnormal motor speed feedback or a complete loss of tachometer signal, preventing normal wash or spin operation.
Common Causes
- Tachometer sensor failure — open or shorted sensor winding. 2. Motor winding shorted or open circuit. 3. Loose, corroded, or damaged motor harness connector. 4. Faulty control board motor drive circuit. 5. Belt-drive models — slipping, worn, or broken drive belt. 6. Locked rotor due to seized bearings or foreign object obstruction.
Self-Check Steps
- With power disconnected, manually rotate the drum to verify no mechanical binding. 2. Inspect the motor harness connector for secure fit and clean terminals. 3. Measure tachometer sensor coil resistance with a multimeter (typically 100-300Ω); replace if open or shorted. 4. Measure motor main winding resistance per the model-specific service manual. 5. On belt-drive models, check belt tension and inspect for wear or slipping marks. 6. If all components above test normal, replace the control board.