Transmission Error Between Indoor Units And Outdoor Units - Daikin VRV RXYMQ-A Series Service Manual

Troubleshooting by Error Code
5.58 Transmission Error between Indoor Units and Outdoor
Units
Applicable All indoor unit models
All outdoor unit models
Models
U4
Error Code
Method of Error Microcomputer checks if transmission between indoor and outdoor units is normal.
Detection
Error Decision
Transmission is not carried out normally for a certain amount of time.
Conditions
Supposed  Short circuit in indoor-outdoor transmission wiring (F1/F2), or wrong wiring
Causes  Outdoor unit power supply is OFF
 System address does not match
 Defective indoor unit PCB
 Defective outdoor unit main PCB
252
SiME332106E
Part 6 Service Diagnosis