i40 - 富及第 洗碗机

中文

含义

错误代码 i40 表示洗碗机门开关电路检测异常，控制器无法确认门是否已正确关闭并锁定。洗碗机门锁组件内通常包含两个微动开关 — 一个检测门钩是否插入，另一个检测锁扣是否到位，当两个开关信号逻辑不一致或其中一只开路/短路时触发此代码。

门未完全关闭时程序不会启动，但此故障也可能由开关本身损坏或接线接触不良引起。

常见原因

1. 门未完全关紧 — 碗篮中有餐具伸出顶住门板，或门铰链变形导致门无法闭合到位。
2. 门锁钩或锁扣磨损 — 长期使用后塑料锁钩或金属锁扣磨损，门虽看似关闭但开关未触发。
3. 微动开关损坏 — 开关内部触点氧化、弹片疲劳，电路无法正常通断。
4. 开关接线端子松动或断开 — 振动导致连接器松脱，或线束被门铰链夹伤。
5. 控制板检测电路故障 — 板级分压电阻或 I/O 口损坏，导致信号电平错误。

自助排查

1. 打开门检查是否有餐具伸出阻挡关门，重新整齐摆放后用力将门推至闭合位置直至听到”咔嗒”锁扣声。
2. 目视检查门锁钩（门板上）和锁扣（机身前框）是否有明显磨损或断裂，用干布清洁接触面上的污垢。
3. 用万用表检查门开关通断：开门时开关应断开（OL），关门时应导通（接近 0Ω）。若信号异常则需更换开关组件。
4. 检查门铰链是否松动或变形导致门无法正确定位，必要时紧固铰链螺钉。
5. 若开关信号正常但故障依旧，控制板可能已损坏，建议联系专业维修人员检修。

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English

Meaning

Error code i40 indicates a fault in the door switch circuit — the control board cannot reliably determine whether the door is closed and latched. The door latch assembly typically contains two micro-switches: one detects latch hook engagement, the other confirms the lock pawl is seated. i40 is set when the signals from these switches disagree or when either reads open/short outside the expected operating state.

The dishwasher will not start a cycle while the door is open, but i40 can also occur when the switches themselves are defective or the wiring is intermittent.

Common Causes

1. Door not fully closed — a utensil is protruding from a rack and blocking the door, or a hinge is bent so the door does not seat completely.
2. Worn latch hook or strike — repeated use has worn the plastic latch hook or metal strike plate, so the switch actuator does not travel far enough.
3. Faulty micro-switch — internal contacts are oxidized or the spring leaf is fatigued, causing intermittent or no continuity.
4. Loose or broken switch wiring — vibration has unseated the connector from the switch, or the harness is pinched at the hinge area.
5. Failed control board detection circuit — a voltage-divider resistor or I/O pin on the main board has failed, producing incorrect signal levels.

Self-Check Steps

1. Open the door fully and check for utensils blocking closure. Rearrange any obstructions, then push the door firmly until you hear a distinct click from the latch.
2. Visually inspect the latch hook (on the door panel) and strike (on the front frame) for wear or cracks. Wipe clean any dirt or grease on the mating surfaces.
3. Using a multimeter, test the door switch continuity: open door should read open circuit (OL), closed door should read near 0 Ω. Replace the switch assembly if readings are abnormal.
4. Check the door hinges for looseness or deformation that prevents proper alignment — tighten hinge screws if needed.
5. If the switches test correctly but i40 persists, the control board may be at fault — contact a qualified service technician.