U7 Outdoor Unit: Transmission Failure (Across Outdoor Units) - Daikin RXYQ96PYDN Service Manual

SiUS34-801A_b
U7
3.50 Outdoor Unit: Transmission Failure (Across Outdoor
Units)
U7
Remote
Controller
Display
Applicable
All models of outdoor units
Models
Method of
Microcomputer checks if transmission between outdoor units.
Malfunction
Detection
Malfunction
When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
Troubleshooting
Connection error in connecting wires between outdoor unit and outdoor unit outside control
adapter
Connection error in connecting wires across outdoor units
Setting error in switching cooling/ heating
Integrated address setting error for cooling/ heating
(function unit, outdoor unit outside control adapter)
Defective outdoor unit PC board (A1P or A3P)
Defective outdoor unit outside control adapter
Troubleshooting by Indication on the Remote Controller
425