中文
含义
排气温度过高保护。室外机压缩机的排气温度传感器检测到排气温度超过安全限值（通常超过115-130℃），系统执行保护性停机。
常见原因
- 制冷剂充注量不足（系统缺氟），压缩比增大导致排气温度飙升
- 室外机冷凝器散热不良——翅片堵塞或风扇不转
- 室内机蒸发器风量不足——滤网堵塞或风机故障
- 制冷剂管路存在堵塞（如毛细管或膨胀阀堵塞）
- 压缩机排气阀片损坏，压缩效率降低导致温度升高
自助排查
- 清洗室内机滤网和室外机冷凝器翅片，确保风道通畅
- 检查室外机风扇是否正常运转
- 测量系统的吸气压力和排气压力，判断制冷剂是否不足
- 若制冷剂不足，需查漏并补充制冷剂；若管路堵塞则需专业疏通
English
Meaning
Discharge temperature too high. The compressor discharge temperature sensor detects that the exhaust temperature has exceeded the safe limit (typically above 115-130°C). The system executes a protective shutdown.
Common Causes
- Low refrigerant charge increasing the compression ratio and causing discharge temperature to spike
- Poor outdoor condenser heat dissipation — blocked coil fins or fan not running
- Insufficient indoor evaporator airflow — clogged filter or fan fault
- Blocked refrigerant circuit (capillary tube or expansion valve restriction)
- Damaged compressor discharge valve reducing compression efficiency and raising temperature
Self-Check Steps
- Clean the indoor air filter and outdoor condenser fins to restore proper airflow
- Check that the outdoor fan is running at normal speed
- Measure suction and discharge pressures to evaluate refrigerant charge level
- If refrigerant is low, locate the leak, repair it, and recharge; if the circuit is blocked, professional cleaning is needed