Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual

Also see for VRV 5 RXYA10A7Y1B: Installer and user guide

22 TroubleshootingInstallation and operation manual56RYMA5+RXYA8~20A7Y1BVRV 5 heat pump4P739915-1 – 2023.12Main code Sub code Cause Solution SVEO(a)SVS(b)Master Slave 1Heat exchanger deicer temperature sensor(R11T) – main PCB (X35A)Check connection on PCB or actuatorUpper heat exchanger – gas - temperaturesensor (R8T) – main PCB (X29A)Check connection on PCB or actuator.Lower heat exchanger – gas - temperaturesensor (R9T) main PCB (X29A)Check connection on PCB or actuator.Liquid main - temperature sensor (R3T) –main PCB (X30A)Check connection on PCB or actuator.Subcool heat exchanger – liquid -temperature sensor (R7T) - main PCB (X30A)Check connection on PCB or actuator.Subcool heat exchanger – liquid -temperature sensor (R16T) - main PCB(X35A)Check connection on PCB or actuator.Upper heat exchanger – liquid -temperaturesensor (R4T ) - main PCB (X30A)Check connection on PCB or actuator.Lower heat exchanger – liquid - temperaturesensor (R5T ) - main PCB (X30A)Check connection on PCB or actuator.Subcool heat exchanger – gas - temperaturesensor (R6T) – main PCB (X30A)Check connection on PCB or actuator.Receiver gas temperature sensor (R13T) –main PCB (X46A)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: INV1transmission trouble - main PCB (X20A,X28A, X40A)Check connection.Transmission outdoor unit - inverter: FAN1transmission trouble - main PCB (X20A,X28A, X40A)Check connection.Transmission outdoor unit - inverter: FAN2transmission trouble - main PCB (X20A,X28A, X40A)Check connection.Transmission main PCB – sub PCB – mainPCB (X20A), sub PCB (X2A, X3A)Check connection.INV1 unbalanced power supply voltage Check if power supply is within range.Reversed power supply phase malfunction Correct phase order.Reversed power supply phase malfunction Correct phase order.INV1 voltage power shortage Check if power supply is within range.INV1 power phase loss Check if power supply is within range.Malfunction code: system test run not yetexecuted (system operation not possible)Execute system test run.An error occurred during the test run Re-execute the test run., Test run aborted Re-execute the test run., Test run aborted due to communicationissuesCheck the communication wires and re-execute the test run.Commissioning of SV unit safety system isnot completedComplete commissioning of SV unit safetysystem. Refer to SV unit manual for moreinformation.Indoor unit communication error Check user interface connection., Malfunction code: faulty wiring to Q1/Q2 Check Q1/Q2wiring.Too many indoor units are connected to F1/F2 lineCheck indoor unit amount and total capacityconnected.