中文
含义
创维电视检测到内部冷却风扇停转或转速异常，E18 代码表示散热风扇（通常存在于 55 寸或更大尺寸的创维电视中）工作异常。内部风扇用于强制排热，配合散热片共同保证电源板和主芯片工作在允许温度范围内。风扇故障不一定立即触发高温保护，但长时间运行会导致内部积热，最终可能触发 E10 过热保护或损坏芯片。
常见原因
- 风扇电机轴承磨损或润滑干涸导致机械卡死，风扇无法转动。
- 风扇供电电压异常（通常为 12V 或 5V）——电源线接触不良或供电电路故障。
- 风扇连接线插头松动或插座虚焊，风扇完全断开。
- 风扇温度控制电路（或主板 MCU 温控策略）异常，未发出风扇启动信号。
- 风扇叶片积尘过多，增加转动阻力导致转速下降至停转。
- 风扇自身老化——电机线圈内部短路或霍尔传感器（用于测速）损坏，即使有供电也无法旋转。
自助排查
- 开机后贴近电视仔细聆听是否有风扇运转的声音——完全无声可能表示风扇停转。
- 用手背在电视散热孔附近感受是否有气流排出——无风感说明风扇可能未工作。
- 断电后打开后盖（需有经验），检查风扇连接线是否牢固插入主板/电源板上的风扇插座。
- 清理风扇叶片和散热孔上的灰尘——用软毛刷或压缩空气清洁，注意不要让风扇叶片反向高速旋转以免损坏轴承。
- 用手轻轻拨动风扇叶片，检查是否旋转自如、有无卡滞或异响——如有明显阻力或噪音，风扇轴承已磨损需要更换。
English
Meaning
The Skyworth TV has detected that the internal cooling fan has stopped or is running at an abnormal speed. Code E18 indicates that the cooling fan (typically present in 55-inch and larger Skyworth models) is operating abnormally. The internal fan is used for forced heat extraction, working together with the heatsinks to keep the PSU and main chip within the allowable temperature range. A fan fault may not trigger immediate thermal protection, but prolonged operation without active cooling will cause internal heat buildup, eventually leading to E10 overheat protection or chip damage.
Common Causes
- The fan motor bearing has worn out or the lubricant has dried up, causing mechanical lockup — the fan cannot spin.
- The fan supply voltage is abnormal (typically 12V or 5V) — loose power wiring or a fault in the supply circuit.
- The fan connector has come loose or the socket has a cold solder joint, completely disconnecting the fan.
- The fan temperature control circuit (or the main MCU thermal management strategy) is abnormal and has not issued the fan start signal.
- Excessive dust accumulation on the fan blades has increased rotational resistance, slowing it down until it stops.
- The fan itself has aged — the motor coil has an internal short or the Hall sensor (for speed feedback) is damaged, preventing rotation even with power supplied.
Self-Check Steps
- After powering on, listen closely near the TV for any fan noise — complete silence may indicate the fan has stopped.
- Hold the back of your hand near the ventilation grilles to feel for airflow — no air movement suggests the fan is not running.
- With the power off and back cover removed (experience required), check that the fan cable is firmly plugged into its socket on the main board or PSU.
- Clean dust from the fan blades and ventilation openings using a soft brush or compressed air. Avoid letting the fan blades spin backwards at high speed, which can damage the bearings.
- Gently spin the fan blades by hand to check for free rotation, binding, or abnormal noise — significant resistance or noise indicates worn bearings requiring fan replacement.