Daikin VRV IV+ Series, Инструкция по установке и эксплуатации

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19 Troubleshooting
Installation and operation manual
34
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Main code Sub code Cause Solution
Master Slave 1 Slave 2
Discharge temperature too high
(R21T/R22T):
▪ Stop valve closed
▪ Refrigerant shortage
▪ Open stop valves.
▪ Check refrigerant recharge
unit.
Compressor casing temperature too
high (R8T/R9T):
▪ Stop valve closed
▪ Refrigerant shortage
▪ Open stop valves.
▪ Check refrigerant recharge
unit.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant recharge
unit.
▪ Open stop valves.
Ambient temperature sensor
malfunction (R1T) - A1P (X18A) Check connection on PCB or actuator.
Discharge temperature sensor
malfunction (R21T): open circuit - A1P
(X19A) Check connection on PCB or actuator.
Discharge temperature sensor
malfunction (R21T): short circuit - A1P
(X19A) Check connection on PCB or actuator.
Discharge temperature sensor
malfunction (R22T): open circuit - A1P
(X19A) Check connection on PCB or actuator.
Discharge temperature sensor
malfunction (R22T): short circuit - A1P
(X19A) Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R8T): open circuit
- A1P (X19A) Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R8T): short circuit
- A1P (X19A) Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R9T): open circuit
- A1P (X19A) Check connection on PCB or actuator.
Compressor casing temperature
sensor malfunction (R9T): short circuit
- A1P (X19A) Check connection on PCB or actuator.
Suction temperature sensor
malfunction (R3T) - A1P (X30A) Check connection on PCB or actuator.
De-icing temperature sensor
malfunction (R7T) - A1P (X30A) Check connection on PCB or actuator
Liquid temperature sensor (after
subcool HE) malfunction (R5T) - A1P
(X30A) Check connection on PCB or actuator.
Liquid temperature sensor (coil)
malfunction (R4T) - A1P (X30A) Check connection on PCB or actuator.
Gas temperature sensor (after subcool
HE) malfunction (R6T) - A1P (X30A) Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): open circuit - A1P (X32A) Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): short circuit - A1P (X32A) Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): open circuit - A1P (X31A) Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): short circuit - A1P (X31A) Check connection on PCB or actuator.