VRF systems
19 Field cases
- EEV Stuck — Reduced Cooling/Heating Capacity
- Indoor Unit Drain Pump Malfunction Causing Water Leak
- Indoor Unit Fan Abnormal Noise and Vibration
- Remote Control Reception Failure — Commands Not Transmitted
- Horizontal Indoor Unit Airflow Louver Malfunction
- P/Q Communication Wire Open/Short Circuit — Indoor Unit Communication Error
- Central Controller Indoor Unit Recognition Failure
- DIP Switch Address Conflict Causing Indoor Unit Communication Clash
- Intermittent Errors from Electromagnetic Interference (EMI) on Communication Wiring
- BMS/Building Management System Gateway Integration Failure
- Reduced Cooling Capacity Due to Long Piping
- Poor Oil Return Causing Compressor Oil Shortage
- REFNET Branch Pipe Incorrect Direction Installation Causing Refrigerant Distribution Imbalance
- BS Unit Valve Malfunction During Simultaneous Cooling/Heating Operation
- Additional Refrigerant Charge Calculation Error During Commissioning
- VRF Branch Pipe Design — Equivalent Length and Pipe Sizing
- VRF Y-Joint Installation — Horizontal / Inclination Rules
- VRF BS Box (Simultaneous Heat/Cool) Fault
- VRF Additional Refrigerant Charging — g/m by Pipe Length