Error Codes: Overview - Daikin RDXYQ5T8V1B Installer And User Manual

22.3.1 Error codes: Overview

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)
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
INFORMATION
If a malfunction occurs:
▪
In case of 5 HP: The error code is displayed on the user interface of the indoor
unit.
▪
In case of 8 HP: The error code is displayed on the compressor unit's 7‑segments
display and on the user interface of the indoor unit.
INFORMATION
If a malfunction occurs, the error code is displayed on the outdoor unit's 7‑segments
display and on the user interface of the indoor unit.
In case of 8 HP: The error code on the compressor unit will indicate a main
malfunction code and a sub code. The sub code indicates more detailed
information about the malfunction code. The main code and sub code will be
displayed intermittent (with an interval of 1 second). Example:
▪ Main code:
▪ Sub code:
In case of 5 HP:
Cause
22
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
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.
Troubleshooting
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amount of
Installer and user reference guide
125