Daikin VRV 5 RXYA8A7Y1B Installer And User Manual page 181

Main Sub code
code
Master Slave 1
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Cause
Discharge temperature sensor
malfunction (R21T): open circuit –
main PCB (X33A)
Discharge temperature sensor
malfunction (R21T): short circuit -
main PCB (X33A)
Compressor casing temperature
sensor malfunction (R15T): open
circuit - main PCB (X33A)
Compressor casing temperature
sensor malfunction (R15T): short
circuit - main PCB (X33A)
Suction compressor temperature
sensor (R12T) – main PCB (X35A)
Suction temperature sensor (R10T)
– main PCB (X29A)
Heat exchanger deicer temperature
sensor (R11T) – main PCB (X35A)
Upper heat exchanger – gas -
temperature sensor (R8T) – main
PCB (X29A)
Lower heat exchanger – gas -
temperature sensor (R9T) main PCB
(X29A)
Liquid main - temperature sensor
(R3T) – main PCB (X30A)
Subcool heat exchanger – liquid -
temperature sensor (R7T) - main
PCB (X30A)
Subcool heat exchanger – liquid -
temperature sensor (R16T) - main
PCB (X35A)
Upper heat exchanger – liquid -
temperature sensor (R4T ) - main
PCB (X30A)
Lower heat exchanger – liquid -
temperature sensor (R5T ) - main
PCB (X30A)
Subcool heat exchanger – gas -
temperature sensor (R6T) – main
PCB (X30A)
Receiver gas temperature sensor
(R13T) – main PCB (X46A)
25
Solution
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Troubleshooting
|
SVEO SVS
(a) (b)
Installer and user reference guide
181