中文
含义
室内机面板通讯故障。室内机主控板与显示面板（操作面板）之间通讯中断，导致按键无响应、显示异常或空调无法接收遥控信号。
常见原因
- 显示面板排线松动或金手指氧化
- 面板主控MCU供电异常或晶振不起振
- 面板按键漏电导致I²C/UART总线数据冲突
- 室内机主控板到面板的通讯线路开路
- 面板受潮或进水导致电路短路
自助排查
- 断电后重新插拔显示面板排线，确保插紧
- 观察显示面板有无显示但按键无效，或完全无显示
- 清洁排线金手指和插座触点
- 如面板无显示，可能是面板本身损坏需更换
English
Meaning
Indoor unit display panel communication failure. Communication between the indoor main control board and the display/operation panel is lost, causing unresponsive buttons, display abnormalities, or failure to receive remote control signals.
Common Causes
- Loose display panel ribbon cable or oxidized gold fingers
- Abnormal panel MCU supply voltage or failed crystal oscillator
- Leaky panel keypad switches causing data bus conflicts on I²C/UART
- Open communication line between indoor main board and panel
- Moisture or water ingress into the panel causing short circuits
Self-Check Steps
- Power off, reseat the display panel ribbon cable at both ends
- Observe whether the display shows content but buttons are unresponsive, or there is no display at all
- Clean the ribbon cable contacts and connector socket with isopropyl alcohol
- If the panel remains dark, the display panel assembly likely needs replacement