U7 - daikin Air Conditioner

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