Malfunction Of Transmission Between Outdoor Units; U7" Malfunction Of Transmission Between Outdoor Units - Daikin RXYQ5-48MAY1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.45 " U7 "

Malfunction of Transmission Between Outdoor Units

U7
Remote
Controller
Display
Applicable All models of indoor units
Models
Method of Microcomputer checks if transmission between indoor unit and remote controller is normal.
Malfunction
Detection
Malfunction When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
234
Improper connection of transmission wiring between outdoor unit and outdoor unit outside
control adaptor
Improper cool/heat selection
Improper cool/heat unified address (outdoor unit, external control adaptor for outdoor unit)
Defect of outdoor unit PC board (A1P)
Defect of outdoor unit outside control adaptor
Improper connection of transmission wiring between outdoor units of multi outdoor unit
connection.
Si39-407
Troubleshooting