Daikin VRV W T-Series Installation Manual

Also see for RWEQ120TAYCU: Operation manual Installation manual

Contents

10 TroubleshootingInstallation manual46RWEQ96~432TAYCUVRV W T-Series water-cooled system air conditioner4P540122-1B – 2018.1110 3 Error codes: OverviewMalfunction codeContents SolutionMaincodeSub codeMaster/sub 1/sub 2E3 01/03/05 ▪ High pressure switch is activated.(S1PH)-A1P (X3A)▪ High pressure switch connectors are detached.-A1P (X3A)▪ Check stop valves situation or abnormalities in(field) piping or waterflow.▪ Securely connect each connector. Refer to the wiringdiagram attached to the back of the control box cover.02/04/06 ▪ Stop valves are closed.▪ Refrigerant overcharge.▪ Open stop valves.▪ Check refrigerant amount and recharge.E4 01/02/03 Low pressure malfunction:▪ Stop valves are closed.▪ Refrigerant shortage.▪ Indoor unit malfunction▪ Open stop valves.▪ Check refrigerant amount and recharge.▪ Check the user interface’s display or transmissionwiring between the outside unit and the indoor unit.E9 01/05/08 Electronic expansion valve malfunction(Y1E)-A1P (X21A)Check connection on printed circuit board or actuator.03/06/09 Electronic expansion valve malfunction(Y2E)-A1P (X22A)Check connection on printed circuit board or actuator.04/07/10 Electronic expansion valve malfunction(Y3E)-A1P (X25A)Check connection on printed circuit board or actuator.F3 01/03/05 Discharge temperature too high (R12T):▪ Stop valves are closed.▪ Refrigerant shortage.▪ Open stop valves.▪ Check refrigerant amount and recharge.20/21/22 Compressor casing temperature too high (R13T):▪ Stop valves are closed.▪ Refrigerant shortage.▪ Open stop valves.▪ Check refrigerant amount and recharge.F6 02 ▪ Stop valves are closed.▪ Refrigerant overcharge.▪ Open stop valves.▪ Check refrigerant amount and recharge.H9 01/02/03 Temperature sensor malfunction(R1T)-A4P (X11A)Check connection on printed circuit board or actuator.HJ 01/02/03 Water system malfunction ▪ Check water pump and waterflow.▪ Check flow switch interlock connection (X2Mterminals 5, 6).J3 16/22/2817/23/2956/57/58Temperature sensor malfunction(R12T)-A1P (X19A)Check connection on printed circuit board or actuator.47/49/5148/50/52Temperature sensor malfunction(R13T)-A1P (X19A)Check connection on printed circuit board or actuator.J5 01/03/05 Temperature sensor malfunction(R3T)-A1P (X30A)Check connection on printed circuit board or actuator.J6 01/02/03 Temperature sensor malfunction(R7T)-A1P (X30A)Check connection on printed circuit board or actuator.J7 01/02/03 Temperature sensor malfunction(R6T)-A1P (X30A)Check connection on printed circuit board or actuator.06/07/08 Temperature sensor malfunction(R8T)-A1P (X29A)Check connection on printed circuit board or actuator.18/19/20 Temperature sensor malfunction(R11T)-A1P (X18A)Check connection on printed circuit board or actuator.J9 01/02/03 Temperature sensor malfunction(R5T)-A1P (X30A)Check connection on printed circuit board or actuator.17/18/19 Temperature sensor malfunction(R2T)-A4P (X12A)Check connection on printed circuit board or actuator.JA 01/02/03 High pressure sensor malfunction(S1NPH)-A1P (X32A)Check connection on printed circuit board or actuator.JC 01/02/03 Low pressure sensor malfunction(S1NPL)-A1P (X31A)Check connection on printed circuit board or actuator.LC 01/06/08 Transmission trouble.A3P (X6A)-A1P (X28A)Check connection.P1 01/02/03 Unbalanced power supply voltage. Check if power supply is within the range.U1 01/05/07 No power supplied to outside unit or indoor unit(Reverse phase/open phase).Check if the power supply wiring for the outside unitor indoor unit is correctly connected, and correct ifnecessary.