中文
含义
室内外机型号不匹配。空调室内机和室外机的型号组合不被系统认可，或两者间的通讯协议无法对齐。多联机系统中尤其常见。
常见原因
- 安装时室内机与室外机型号搭配错误（如不同系列混搭）
- 室内机或室外机的主板被更换为不匹配的型号
- 系统通过拨码开关设定的容量代码与实际设备不匹配
- 多联机系统内室内机总容量超出室外机的允许范围
- 新旧通信协议版本差异导致握手失败
自助排查
- 核对室内机和室外机的铭牌型号，确认属于同一系列和匹配组合
- 检查室外机主板上关于室内机容量的拨码开关设置是否正确
- 测量室内外通讯线的连接是否正确（P/Q端子极性）
- 若近期更换过主板，请确认更换的主板型号与原装一致
English
Meaning
Indoor/outdoor unit model mismatch. The combination of indoor and outdoor unit models is not recognized by the system, or their communication protocols cannot align. This is especially common in multi-split systems.
Common Causes
- Indoor and outdoor units from incompatible series were paired during installation
- Main board on either unit was replaced with an incorrect model
- Capacity code set via DIP switches does not match the actual installed unit
- Total indoor unit capacity in a multi-split system exceeds the outdoor unit’s allowable range
- Communication protocol version mismatch between old and new units causing handshake failure
Self-Check Steps
- Check the model number on the nameplates of both indoor and outdoor units to confirm they are a valid matching pair
- Verify the DIP switch settings on the outdoor unit main board for indoor unit capacity configuration
- Check the indoor-outdoor communication wiring (P/Q terminal polarity) for correct connections
- If either main board was recently replaced, verify the replacement part number matches the original