Troubleshooting by Error Code SiUS331604E
207 Service Diagnosis
4.49 System Abnormality, Refrigerant System Address
Undefined
Error Code UH
Applicable
Models
All indoor units
Method of Error
Detection
An indoor unit without automatically set address is detected.
Error Decision
Conditions
The error decision is made as soon as the abnormality aforementioned is detected.
Supposed
Causes
Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor
units
Defective indoor unit PCB
Defective outdoor main PCB (A1P)
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