Transmission Error Between Outdoor Units - Daikin RXQ12AHR Service Manual

Troubleshooting by Error Code

5.53 Transmission Error between Outdoor Units

Applicable All outdoor unit models
Models
U7
Error Code
Method of Error Microcomputer checks if transmission between outdoor units is normal.
Detection
Error Decision
When transmission is not carried out normally for a certain amount of time
Conditions
Supposed
 Connection error of transmission wirings between outdoor unit and external control adaptor
Causes
 Connection error of transmission wirings between outdoor units
 Defective outdoor unit main PCB
 Defective external control adaptor for outdoor unit
270
for outdoor unit
SiAF341904E
Part 6 Service Diagnosis