10 | Troubleshooting
Installer and user reference guide
46
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02
Main code Contents
Electronic expansion valve malfunction (outdoor)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Fan motor trouble (outdoor)
Ambient temperature sensor malfunction (outdoor)
Pressure sensor malfunction
Current sensor malfunction
Discharge temperature sensor malfunction (outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE) malfunction
(outdoor)
Gas temperature sensor (after subcool HE) malfunction (outdoor)
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Shut-off PCB transmission trouble or disconnection
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/outdoor
Abnormal user interface - indoor communication
Abnormal main-sub user interface communication
System mismatch. Wrong type of indoor units combined. Indoor
unit malfunction.
Connection malfunction over indoor units or type mismatch
System lock
Back-up PCB error
External ventilation input error
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