中文
含义
制冷剂泄漏检测报警。系统检测到制冷剂不足或泄漏，保护停机。长期泄漏不仅影响制冷/制热效果，还会损坏压缩机。
常见原因
- 管路喇叭口或焊接处长期振动产生微漏
- 铜管被老鼠咬穿或安装时弯折开裂
- 室外机截止阀阀芯密封圈老化渗漏
- 蒸发器或冷凝器铜管腐蚀穿孔
- 上次维修时加氟口未拧紧或阀芯密封不严
自助排查
- 观察室内外机连接管路及接头处有无油渍——油渍通常伴随制冷剂泄漏
- 用肥皂水涂抹各接头和阀门处，冒泡处即泄漏点
- 听系统运行时有无明显嘶嘶声（大量泄漏）
- 泄漏需专业人员查漏补焊并补充制冷剂，严禁自行补充
English
Meaning
Refrigerant leak detection alarm. The system has detected insufficient refrigerant charge or a leak, triggering protective shutdown. Prolonged undercharge not only reduces cooling/heating performance but can also damage the compressor.
Common Causes
- Micro-leaks at flare nuts or brazed joints caused by long-term vibration
- Copper tubing punctured by rodents or cracked from bending during installation
- Aged valve core seals on the outdoor unit service valves
- Corrosion pinholes in the evaporator or condenser coil tubes
- Loose service port caps or improperly sealed Schrader valves from previous service
Self-Check Steps
- Inspect all pipe connections and joints for oil stains — oil residue usually accompanies refrigerant leaks
- Apply soapy water to all joints and valves — bubbles indicate a leak point
- Listen for audible hissing during operation (large leak)
- Leak repair requires professional recovery, brazing, evacuation, and recharge — never attempt DIY refrigerant top-up