8-2 - 凯膳怡 洗碗机

中文

含义

8-2 表示主控板检测到排水泵电路电气故障。排水泵是一台小型同步或异步电机，主控板通过继电器或 TRIAC 控制其启停。在排水阶段，主控板启动排水泵并监测其工作电流，如果检测到电流异常（过流、短路或无电流），显示 8-2 代码并中止排水操作，剩余水将留在内胆中。

常见原因

1. 排水泵电机绕组因进水或过热烧毁，匝间短路导致电流远超正常值触发过流保护。
2. 排水泵叶轮被硬物完全卡死，电机堵转电流急剧增大，主控板检测到过流后切断供电并报警。
3. 排水泵电机线圈内部断路（绕组烧断），通电后无电流流过被检测为开路故障。
4. 排水泵线束插头在泵体一侧因长期处于潮湿环境中端子严重腐蚀，接触电阻过大导致供电失效。
5. 主控板上排水泵驱动 TRIAC 击穿短路，排水泵不受控持续运转或状态信号异常。
6. 主控板上排水泵驱动继电器线圈电阻烧断或触点焊接粘连，无法正常闭合或断开。
7. 排水泵内部热保护开关（一些型号配备）误动作，断开电机供电回路。

自助排查

1. 断开洗碗机电源，找到排水泵（通常位于机器底部靠近前面板方向），观察泵体外观是否有烧焦痕迹、塑料壳体熔化或底部渗水。
2. 拔下排水泵线束插头，检查插头内部金属端子是否有蓝绿色铜锈或白色粉末状腐蚀物。
3. 用万用表电阻档测量排水泵电机线圈两端：典型阻值约为 10Ω-40Ω（根据型号不同）；如阻值为无穷大（OL），线圈已断路；如阻值明显偏低（<5Ω），线圈可能短路。
4. 用手尝试转动排水泵叶轮（伸入排水泵入口触感），确认叶轮没有被碎片或异物卡死，应能轻松旋转。
5. 沿着线束从排水泵追踪至主控板，检查是否有线束被挤压、割破或老鼠啃咬痕迹。
6. 如排水泵线圈阻值正常、叶轮自由且线束完好但仍报 8-2，说明主控板驱动电路损坏，需联系凯膳怡售后更换主控板。

English

Meaning

8-2 indicates that the main control board has detected an electrical fault in the drain pump circuit. The drain pump is a small synchronous or induction motor controlled by the control board via a relay or TRIAC. During the drain phase, the control board starts the drain pump and monitors its operating current. If it detects abnormal current (overcurrent, short circuit, or no current), it displays code 8-2 and aborts the drain operation, leaving residual water in the tub.

Common Causes

1. The drain pump motor winding has burned out from water ingress or overheating; an inter-turn short causes current far exceeding the normal value and triggers overcurrent protection.
2. The drain pump impeller is completely jammed by hard debris; the motor stall current surges sharply, and the control board detects the overcurrent and cuts power while raising the alarm.
3. The drain pump motor coil has an internal open circuit (winding burned through); no current flows when energized, detected as an open-circuit fault.
4. The drain pump wiring harness connector on the pump side has severely corroded terminals due to long-term exposure to a humid environment; excessive contact resistance causes power supply failure.
5. The drain pump drive TRIAC on the main control board has broken down and shorted; the drain pump runs uncontrollably or the status signal is abnormal.
6. The drain pump drive relay coil on the control board has a burned-out coil winding, or its contacts are welded shut, preventing normal opening or closing.
7. The internal thermal protection switch on the drain pump (fitted on some models) has tripped falsely, disconnecting the motor supply loop.

Self-Check Steps

1. Disconnect power, locate the drain pump (typically at the bottom of the machine toward the front panel), and visually inspect the pump body for scorch marks, melted plastic housing, or water seepage at the base.
2. Unplug the drain pump wiring harness connector and inspect the internal metal terminals for blue-green copper corrosion or white powdery oxidation.
3. Use a multimeter in resistance mode to measure across the drain pump motor coil terminals: typical resistance is approximately 10Ω–40Ω depending on the model; infinite resistance (OL) means the coil has opened; a significantly low reading (<5Ω) suggests a shorted coil.
4. Try turning the drain pump impeller by hand (reach into the drain pump inlet by feel); confirm the impeller spins freely and is not jammed by debris or foreign objects.
5. Trace the wiring harness from the drain pump to the main control board, checking for pinched, cut, or rodent-chewed wiring.
6. If the drain pump coil resistance is normal, the impeller spins freely, and the harness is intact but code 8-2 persists, the drive circuit on the main control board is damaged — contact KitchenAid after-sales service for control board replacement.