U7 - 大金 空调

中文

含义

U7 为室外机之间的通讯故障。多联机系统中各室外机间通讯异常。

常见原因

1. 室外机连接线故障
2. 室外机地址冲突
3. 主从设定错误
4. 某台室外机断电

自助排查

1. 检查室外机间连接线
2. 检查各室外机地址开关
3. 检查各室外机供电

English

Meaning

Communication fault between outdoor units in a multi-unit system.

Common Causes

1. Inter-unit wiring fault
2. Address conflict
3. Master/slave setting error
4. One outdoor unit powered off

Self-Check Steps

1. Check wiring between outdoor units
2. Check address DIP switches
3. Check each unit’s power supply