Service manual

SiUS28-902_a Troubleshooting by Indication on the Unified ON/OFF Controller
Troubleshooting 150
5. Troubleshooting by Indication on the Unified ON/
OFF Controller
5.1 Operation Lamp Blinks
Remote
Controller
Display
Operation lamp blinks
Applicable
Models
All models of indoor units
Unified ON/OFF controller
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
 Malfunction of transmission between optional controller and indoor unit
 Connector for setting master controller is disconnected
 Defect of unified ON/OFF controller
 Defect of indoor unit P.C.B.
 Malfunction of air conditioner