Transmission Error Between Centralized Controller And Indoor Unit - Daikin VRV EMERION REYQ-AATJA Service Manual

Troubleshooting by Error Code
3.77 Transmission Error between Centralized Controller and
Indoor Unit
Applicable
All indoor unit models
Models
Central remote controller
Schedule timer
intelligent Touch Controller
UE
Error Code
Method of Error
Microcomputer checks if transmission between indoor unit and centralized controller is normal.
Detection
Error Decision
When transmission is not carried out normally for a certain amount of time
Conditions
Supposed
 Transmission error between optional controllers for centralized controller and indoor unit
Causes  Connector for setting main controller is disconnected.
 Defective PCB for centralized controller
 Defective indoor unit PCB
441
(or disconnection of connector for independent / combined use changeover switch.)
SiUS372201EB
Part 6 Service Diagnosis