Correcting After Abnormal Completion Of The Test Run; Operating The Unit; Troubleshooting; Solving Problems Based On Error Codes - Daikin RKXYQ5T7Y1B Installation And Operation Manual

8 Troubleshooting

Completion
Normal
completion
Abnormal
completion
Refer to "7.3.3 Correcting after abnormal
completion of the test run" on page 22
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
7.3.3 Correcting after abnormal completion of
the test run
The test operation is only completed if there is no malfunction code
displayed. In case of a displayed malfunction code, perform
correcting actions as explained in the malfunction code table. Carry
out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
INFORMATION
Refer to the installation manual of the indoor unit for other
detailed malfunction codes related to indoor units.
8.1.1

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)
▪ 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)
Installation and operation manual
22
Description
to take
Cause
7.3.4

Operating the unit

Once the units are installed and test operation of compressor unit,
heat exchanger unit and indoor units is finished, the operation of the
system can start.
For operating the indoor unit, the user interface of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
8 Troubleshooting
8.1 Solving problems based on error
codes
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
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.
VRV IV compressor unit for indoor installation
Solution
RKXYQ5T7Y1B
4P408443-1 – 2015.07