Service manual

Troubleshooting by Indication on the Centralized Remote Controller SiUS28-902_a
143 Troubleshooting
4. Troubleshooting by Indication on the Centralized
Remote Controller
4.1 “UE” Malfunction of Transmission between Centralized
Remote Controller and Indoor Unit
Remote Controller
Display
UE
Applicable
Models
AII indoor unit models
Centralized Remote Controller
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor unit and centralized remote controller is
normal.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time
Supposed
Causes
 Malfunction of transmission between optional controllers for centralized control and indoor unit
 Connector for setting master controller is disconnected.
 Failure of P.C.B. for centralized remote controller
 Defect of indoor unit P.C.B.