中文
含义
压缩机排气温度过高保护——排气温度超过设定上限（通常 >120°C），系统停机保护。
常见原因
- 制冷系统缺氟导致排气温度急剧升高
- 室外机冷凝器脏堵或散热不良
- 室内机蒸发器过滤网堵塞导致回风不足
- 压缩机回气温度过高或回气压力过低
- 电子膨胀阀或毛细管堵塞
- 排气温度传感器安装位置松动导致误报
自助排查
- 清洗室内机过滤网，保证回风通畅
- 清洁室外机冷凝器翅片，改善散热
- 检查系统制冷剂压力，确认是否缺氟
- 确保排气温度传感器探头插到位
- 若频繁保护需联系专业人员检漏并补充制冷剂
English
Meaning
Compressor discharge temperature too high — exhaust temperature exceeds the upper limit (typically >120°C). System shuts down for protection.
Common Causes
- Low refrigerant charge causing rapidly rising discharge temperature
- Dirty or blocked outdoor condenser coil with poor heat dissipation
- Clogged indoor unit air filter causing insufficient return air
- High compressor suction temperature or low suction pressure
- Blocked electronic expansion valve or capillary tube
- Loose discharge temperature sensor installation causing false readings
Self-Check Steps
- Clean the indoor unit air filter to ensure proper airflow
- Clean the outdoor condenser coil fins to improve heat dissipation
- Check the system refrigerant pressure to confirm whether charge is low
- Ensure the discharge temperature sensor probe is fully inserted
- If protection trips frequently, contact a professional to leak-check and recharge refrigerant