core/homeassistant/components/rachio/icons.json

{
  "entity": {
    "switch": {
      "standby": {
        "default": "mdi:power"
      },
      "rain_delay": {
        "default": "mdi:camera-timer"
      }
    }
  },
  "services": {
    "set_zone_moisture_percent": "mdi:water-percent",
    "start_multiple_zone_schedule": "mdi:play",
    "pause_watering": "mdi:pause",
    "resume_watering": "mdi:play",
    "stop_watering": "mdi:stop",
    "start_watering": "mdi:water"
  }
}