Error Codes: Overview - Daikin VRV IV RKXYQ5T8Y1B Series Installation And Operation Manual

19.1.1

Error codes: Overview

In case of 5 HP:
Main code
▪ Heat exchanger fan malfunction.
▪ Drain pump feedback contact is open.
▪ The stop valves of the compressor unit are left closed.
▪ Refrigerant overcharge
▪ The stop valves of the compressor unit are left closed.
▪ Insufficient refrigerant
Electronic expansion valve malfunction
Heat exchanger unit: (Y1E) - A1P (X7A)
Compressor unit: (Y1E) - A1P (X22A)
▪ The stop valves of the compressor unit are left closed.
▪ Insufficient refrigerant
Refrigerant overcharge
Ambient temperature sensor malfunction
Heat exchanger unit: (R1T) - A1P (X16A)
Discharge temperature sensor malfunction: open circuit /
short circuit
Compressor unit: (R2T) - A1P (X12A)
Heat exchanger gas sensor malfunction
Heat exchanger unit: (R2T) - A1P (X18A)
Suction temperature sensor malfunction
Compressor unit: (R3T) - A1P (X12A)
Compressor unit: (R5T) - A1P (X12A)
Coil temperature sensor malfunction
Heat exchanger unit: (R3T) - A1P (X17A)
Liquid temperature sensor (after subcool HE) malfunction
Compressor unit: (R7T) - A1P (X13A)
Gas temperature sensor (after subcool HE) malfunction
Compressor unit: (R4T) - A1P (X12A)
High pressure sensor malfunction: open circuit / short circuit
Compressor unit: (BIPH) - A1P (X17A)
Low pressure sensor malfunction: open circuit / short circuit
Compressor unit: (BIPL) - A1P (X18A)
Transmission compressor unit - inverter: INV1 transmission
trouble
INV1 unbalanced power supply voltage
Heat exchanger unit capacity setting malfunction.
Insufficient supply voltage
Malfunction code: System test run not yet executed (system
operation not possible)
RKXYQ5T8 + RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1A – 2020.10
Cause
19 Troubleshooting
Solution
In the heat exchanger unit:
▪ Check connection on PCB: A1P (X15A)
▪ Check connection on terminal block (X2M)
▪ Check the fan connectors.
▪ Open the stop valves on both the gas and liquid side.
▪ Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
▪ Open the stop valves on both the gas and liquid side.
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Check connection on PCB or actuator.
▪ Open the stop valves on both the gas and liquid side.
▪ Check if the additional refrigerant charge has been
finished correctly. Recalculate the required amount of
refrigerant from the piping length and add an adequate
amount of refrigerant.
Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
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.
Check if power supply is within range.
Check the type of heat exchanger unit. If necessary, replace
the heat exchanger unit.
Check if the supply voltage is supplied properly.
Execute system test run.
Installation and operation manual
39