中文
含义
系统高压保护——制冷系统高压侧压力超过安全阈值，压缩机停机保护。
常见原因
- 室外机冷凝器严重脏堵导致散热不良
- 室外环境温度过高（>45°C）超出设计范围
- 制冷剂充注过量导致高压偏高
- 室外风机故障导致风量不足
- 高压管路堵塞或截止阀未完全打开
- 四通阀串气导致系统压力异常
自助排查
- 清洗室外机冷凝器翅片，去除灰尘和杂物
- 确认室外机周围通风良好，无遮挡物
- 检查室外机风扇运转是否正常
- 确认室外机截止阀完全打开
- 若频繁高压保护，需专业人员检测制冷剂压力和充注量
English
Meaning
High-pressure protection — system high-side pressure exceeds the safety threshold. Compressor shuts down for protection.
Common Causes
- Severely dirty or blocked outdoor condenser coil reducing heat dissipation
- Outdoor ambient temperature exceeding the design limit (>45°C)
- Excessive refrigerant charge causing high-side pressure to rise
- Outdoor fan failure causing insufficient airflow
- Blocked high-pressure line or service valve not fully open
- Four-way valve bypass leakage causing abnormal system pressure
Self-Check Steps
- Clean the outdoor condenser coil fins to remove dust and debris
- Ensure adequate ventilation around the outdoor unit with no obstructions
- Verify the outdoor fan is operating normally
- Confirm the outdoor unit service valves are fully open
- If high-pressure protection occurs frequently, have a professional check refrigerant pressure and charge level