中文
含义
系统低压保护——制冷系统低压侧压力低于安全阈值，压缩机停机保护。
常见原因
- 制冷剂泄漏导致系统压力不足
- 蒸发器结霜严重影响热交换
- 室内机过滤网堵塞导致回风量不足
- 膨胀阀或毛细管堵塞
- 制冷系统管路存在堵塞点
- 低压传感器故障导致误报
自助排查
- 清洗室内机过滤网，保证回风通畅
- 观察室内机蒸发器是否结霜，结霜严重则停机化霜
- 检查室外机管路接口处是否有油迹（泄漏痕迹）
- 将空调设为送风模式运行 10 分钟后切换制冷模式
- 反复出现需专业人员检漏并补充制冷剂
English
Meaning
Low-pressure protection — system low-side pressure drops below the safety threshold. Compressor shuts down for protection.
Common Causes
- Refrigerant leakage causing insufficient system pressure
- Severe evaporator frosting affecting heat exchange
- Clogged indoor unit air filter reducing return airflow
- Blocked expansion valve or capillary tube
- Obstruction in the refrigerant piping
- Faulty low-pressure sensor causing false alarm
Self-Check Steps
- Clean the indoor unit air filter to ensure adequate airflow
- Check the evaporator for heavy frost; if frosted, let it defrost completely
- Inspect outdoor unit pipe connections for oil stains (signs of leakage)
- Run the unit in fan-only mode for 10 minutes before switching to cooling mode
- If the error persists, contact a professional to leak-check and recharge refrigerant