中文
含义
线路断开检测。系统检测到室内机与室外机之间的某条连接线异常断开或接线错误，通常涉及电源线或信号线的异常。
常见原因
- 室内外连接线的其中一根导线在接线端子处脱落
- 连接线在穿墙处被尖锐边缘割断
- 接线端子螺丝未拧紧导致接触电阻过大发热
- 多联机系统中某台室内机的分支连接线未接好
- 安装时误将信号线接在电源端子上导致短路
自助排查
- 关闭空调电源，逐一检查室内机和室外机接线端子上的每根线是否压接牢固
- 检查连接线在穿墙孔处是否有破损或割伤
- 使用万用表测量每根连接线的通断性
- 确认接线完全符合接线图上的标注（L/N/S或P/Q对应正确）
English
Meaning
Disconnection detection. The system detects that one of the connection wires between the indoor and outdoor units is abnormally open or miswired, typically involving a power or signal line.
Common Causes
- One conductor of the interconnecting wire has pulled out of its terminal block
- The connection wire has been cut through at a sharp wall pass-through edge
- Terminal screw not fully tightened, causing high contact resistance and heating
- In a multi-split system, a branch connection to one indoor unit is not properly made
- During installation, the signal wire was mistakenly connected to a power terminal causing a short
Self-Check Steps
- Power off the AC and check each wire at both the indoor and outdoor terminal blocks for a secure connection
- Inspect the wire at the wall pass-through for chafing or cuts
- Use a multimeter continuity test on each conductor
- Verify the wiring matches the diagram labels (L/N/S or P/Q correct for each terminal)