Daikin VRV 5-S - Page 163

25 | Troubleshooting
Installer and user reference guide
163
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
Main
code
Sub
code
Cause Solution SVEO
(a)
SVS
(b)
Discharge temperature sensor
malfunction (R21T): open circuit –
main PCB (X33A)
Check connection on PCB or actuator.
Discharge temperature sensor
malfunction (R21T): short circuit -
main PCB (X33A)
Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R8T): open circuit
- main PCB (X33A)
Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R8T): short circuit
- main PCB (X33A)
Check connection on PCB or actuator.
Suction temperature sensor (R3T) –
main PCB (X30A)
Check connections on PCB or actuator.
Heat exchanger deicer temperature
sensor (R7T) – main PCB (X30A)
Check connection on PCB or actuator
Subcool heat exchanger – liquid -
temperature sensor (R5T) - main PCB
(X30A)
Check connection on PCB or actuator.
Heat exchanger – liquid -temperature
sensor (R4T ) - main PCB (X30A)
Check connection on PCB or actuator.
Subcool heat exchanger – gas -
temperature sensor (R6T) – main PCB
(X30A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): open circuit - main PCB
(X32A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): short circuit - main PCB
(X32A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): open circuit - main PCB
(X31A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): short circuit - main PCB
(X31A)
Check connection on PCB or actuator.
Transmission outdoor unit - inverter:
INV1 transmission trouble - main PCB
(X20A, X28A, X40A)
Check connection.
Transmission outdoor unit - inverter:
FAN1 transmission trouble - main PCB
(X20A, X28A, X40A)
Check connection.
Transmission outdoor unit - inverter:
FAN2 transmission trouble - main PCB
(X20A, X28A, X40A)
Check connection.