{
  "$schema": "robofaults-fault-record/v0",
  "kind": "error",
  "brand": "roborock",
  "page_en": "https://robofaults.com/roborock/error-4/",
  "page_es": "https://robofaults.com/es/roborock/error-4/",
  "code": "4",
  "slug": "error-4",
  "device_type": "vacuum",
  "name_en": "Cliff sensor error",
  "name_es": "Error del sensor de desnivel",
  "badge": "ERR 4",
  "severity": "warn",
  "severity_note_en": "robot stops because it can't trust its drop sensors",
  "severity_note_es": "el robot se detiene porque no puede fiarse de sus sensores de desnivel",
  "series": [
    "S5",
    "S6",
    "S7",
    "S8",
    "Q"
  ],
  "tools_en": "soft dry cloth",
  "tools_es": "paño suave y seco",
  "time_min": 5,
  "difficulty": "easy",
  "safety": "none",
  "safety_note_en": "",
  "safety_note_es": "",
  "meaning_en": "Error 4 means the <b>cliff sensors report nonsense</b> — usually because they're dusty, the robot is hanging over a drop, or it's sitting on very dark carpet. Wipe the sensors and move the robot away from edges.",
  "meaning_es": "El error 4 significa que los <b>sensores de desnivel dan lecturas absurdas</b> — normalmente porque están sucios, el robot cuelga sobre un desnivel o está sobre una alfombra muy oscura. Limpia los sensores y aleja el robot de los bordes.",
  "causes": [
    {
      "title_en": "Dusty cliff sensors",
      "title_es": "Sensores de desnivel sucios",
      "detail_en": "A film of dust over the sensor windows under the front edge makes the floor invisible to the robot.",
      "detail_es": "Una capa de polvo sobre las ventanas de los sensores bajo el borde delantero hace el suelo invisible para el robot.",
      "likelihood": "most_common"
    },
    {
      "title_en": "Robot over a raised edge",
      "title_es": "Robot sobre un borde elevado",
      "detail_en": "Parked half over a stair or ledge, the sensors correctly see a drop and stop everything.",
      "detail_es": "A medias sobre un escalón o cornisa, los sensores detectan correctamente una caída y lo paran todo.",
      "likelihood": "common"
    },
    {
      "title_en": "Dark or shag carpet",
      "title_es": "Alfombra oscura o de pelo largo",
      "detail_en": "Very dark or deep-pile carpet absorbs the infrared signal and reads as a cliff. Roborock confirms this trigger officially.",
      "detail_es": "Una alfombra muy oscura o de pelo largo absorbe la señal infrarroja y se interpreta como un precipicio. Roborock confirma esta causa oficialmente.",
      "likelihood": "common"
    }
  ],
  "steps": [
    {
      "title_en": "Wipe all cliff sensors",
      "title_es": "Limpia todos los sensores de desnivel",
      "detail_en": "Flip the robot and wipe every sensor window along the front underside with a soft dry cloth.",
      "detail_es": "Da la vuelta al robot y limpia cada ventana de sensor de la parte delantera inferior con un paño suave y seco."
    },
    {
      "title_en": "Move away from drops",
      "title_es": "Aléjalo de los desniveles",
      "detail_en": "Set the robot down at least a metre from stairs or ledges and restart.",
      "detail_es": "Coloca el robot al menos a un metro de escaleras o bordes y reinicia."
    },
    {
      "title_en": "Test off the dark carpet",
      "title_es": "Prueba fuera de la alfombra oscura",
      "detail_en": "If the error only fires on a black or shag rug, start the robot on hard floor and fence the rug off with a no-go zone.",
      "detail_es": "Si el error solo salta en una alfombra negra o de pelo largo, arranca el robot en suelo duro y delimita la alfombra con una zona prohibida."
    }
  ],
  "parts": [],
  "firmware_series": "s5",
  "related": [
    "16",
    "3",
    "26"
  ],
  "sources": [
    {
      "label_en": "Roborock Support — What should I do when error 4 occurs?",
      "label_es": "Soporte de Roborock — ¿Qué hago si aparece el error 4?",
      "url": "https://support.roborock.com/hc/en-us/articles/360035369132-What-should-I-do-when-error-4-occurs",
      "kind": "official"
    },
    {
      "label_en": "Roborock S5 Max user manual — Troubleshooting",
      "label_es": "Manual de usuario del Roborock S5 Max — Solución de problemas",
      "url": "https://support.roborock.com/hc/en-us/articles/360037037852-Roborock-S5-Max-CE-EN-Manual",
      "kind": "official"
    }
  ],
  "confidence": "official",
  "last_verified": "2026-07-05"
}