Transmission Error (Across Outdoor Units) - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

Troubleshooting by Remote Controller

2.35 Transmission Error (Across Outdoor Units)

U7
Remote
Controller
Display
Applicable RQYQ-PY1B
Models
Method of Error Micro-computer checks if transmission between outdoor units is normal.
Detection
Error Decision When transmission is not carried out normally for a certain amount of time
Conditions
Supposed
Causes
160
Connection error in connecting wires between outdoor unit and external control adaptor for
outdoor unit
Connection error in connecting wires across outdoor units
Setting error in switching cool/heat
Unified address setting error for cool/heat
(external control adaptor for outdoor unit)
Defective outdoor unit PCB (A1P)
Defective external control adaptor for outdoor unit
SiBE341027
Service Diagnosis