Daikin VRV IV Q+ Series Installer And User Reference Manual page 149

Main code
Master
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
Sub code
Slave 1 Slave 2
Cause
Discharge temperature sensor
malfunction (R21T): open
circuit - A1P (X19A)
Discharge temperature sensor
malfunction (R21T): short
circuit - A1P (X19A)
Discharge temperature sensor
malfunction (R22T): open
circuit - A1P (X19A)
Discharge temperature sensor
malfunction (R22T): short
circuit - A1P (X19A)
Compressor casing
temperature sensor
malfunction (R8T): open
circuit - A1P (X19A)
Compressor casing
temperature sensor
malfunction (R8T): short
circuit - A1P (X19A)
Compressor casing
temperature sensor
malfunction (R9T): open
circuit - A1P (X19A)
Compressor casing
temperature sensor
malfunction (R9T): short
circuit - A1P (X19A)
Suction temperature sensor
malfunction (R3T) - A1P
(X30A)
De-icing temperature sensor
malfunction (R7T) - A1P
(X30A)
Liquid temperature sensor
(after subcool HE) malfunction
(R5T) - A1P (X30A)
Liquid temperature sensor
(coil) malfunction (R4T) - A1P
(X30A)
Gas temperature sensor (after
subcool HE) malfunction (R6T)
- A1P (X30A)
24 Troubleshooting
|
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.
Installer and user reference guide
149