Improper Combination Of Indoor, Branch Selector And Outdoor Units - Daikin REYQ-XA Service Manual

Troubleshooting by Error Code
3.70 Improper Combination of Indoor, Branch Selector and
Outdoor Units
UA
Error Code
Applicable All indoor unit models
Branch Selector unit
Models
All outdoor unit models
Method of Error
Detection
Error Decision
The error decision is made as soon as either of the abnormalities aforementioned is detected.
Conditions
Supposed
Causes
357
A difference occurs in data by the type of refrigerant between indoor, Branch Selector and
outdoor units.
The number of indoor units is out of the allowable range.
Signal transmission between indoor, Branch Selector and outdoor units is abnormal.
Excess of connected indoor units
Defective outdoor unit main PCB
Mismatch of the refrigerant type of indoor and outdoor unit.
Setting of outdoor unit main PCB was not carried out after replacing to spare PCB.
SiUS371901E
Service Diagnosis