10 | Troubleshooting
Installer and user reference guide
45
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
Main code Contents
SV unit damper malfunction
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
High pressure switch malfunction
Fan motor malfunction (outdoor)
Ambient temperature sensor malfunction (outdoor)
Discharge temperature sensor malfunction (outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor) or heat
exchanger gas temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE) malfunction
(outdoor)
Liquid temperature sensor (coil) 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
INV PCB abnormal
Compressor over current detected
Compressor lock (startup)
Transmission outdoor unit - inverter: INV transmission trouble
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
Reversed power supply phase malfunction
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/SV unit/outdoor
Abnormal user interface - indoor communication
Faulty wiring to outdoor/outdoor
Warning because there is an error on another unit (indoor/SV
unit)
Connection malfunction over indoor units or type mismatch
System lock
External ventilation input error
Centralised address duplication