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Troubleshooting by Indication on the Remote Controller
SiUS30-1301
230
Service Diagnosis
3.46 Improper Combination of Indoor, Branch Selector and
Condensing Units
Error Code
UA
Applicable
Models
All indoor models
Branch Selector unit
RWEYQ72P, 84P
Method of Error
Detection
A difference occurs in data by the type of refrigerant between indoor, Branch Selector and
condensing units.
The number of indoor units is out of the allowable range.
Signal transmission between indoor, Branch Selector and condensing units is abnormal.
Error Decision
Conditions
The error decision is made as soon as either of the abnormalities aforementioned is detected.
Supposed
Causes
Excess of connected indoor units
Defective condensing unit PCB (A1P)
Mismatch of the refrigerant type of indoor and condensing unit.
Setting condensing unit PCB was not carried out after replacing to spare PCB.