Improper Combination Of Indoor, Branch Selector And Outdoor Units - Daikin VRV EMERION REYQ-AATJA Service Manual

Troubleshooting by Error Code
3.73 Improper Combination of Indoor, Branch Selector and
Outdoor Units
Applicable
All indoor unit models
Models
Branch Selector unit
All outdoor unit models
UA
Error Code
Method of Error
 A difference occurs in data by the type of refrigerant between indoor, Branch Selector and
Detection
 The number of indoor units is out of the allowable range.
 Signal transmission between indoor, Branch Selector and outdoor units is abnormal.
Error Decision
The error decision is made as soon as either of the abnormalities aforementioned is detected.
Conditions
Supposed
 Excess of connected indoor units
Causes  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.
431
outdoor units.
SiUS372201EB
Part 6 Service Diagnosis