Correcting After Abnormal Completion Of The Test Run; Hand-Over To The User; Troubleshooting; Solving Problems Based On Error Codes - Daikin RXYLQ10T7Y1B Series Installation And Operation Manual

Step
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Refrigerant amount check (NOT in case of
Hydrobox, RA or AHU connection)
Unit stop
In case:
▪ Setting [2-4]=1 or 2
▪ AND room temperature <25°C:
Step
Control before start up (pressure equalisation)
Heating start up control
Communication check + Stop valve check
Pre-heating operation (ONLY if setting [2-4]=2)
+ Heating pump down control
Cooling start up control
Unit stop
Note: During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation, press BS3.
The unit will stop after ±30 seconds.
5 Check the test operation results on the outdoor unit 7‑segment
display.
Completion
Normal completion No indication on the 7‑segment display (idle).
Abnormal Indication of malfunction code on the
completion 7‑segment display.
Refer to "17.5 Correcting after abnormal
completion of the test
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
17.5 Correcting after abnormal
completion of the test run
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit 7‑segment display. 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.
19.2

Error codes: Overview

Main code
Master
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1B – 2020.10
Description
Description
Description
run" [ 4 35] to take
Sub code
Slave 1 Slave 2
High pressure switch was activated
(S1PH, S2PH) - A1P (X3A; X4A)
▪ Refrigerant overcharge
▪ Stop valve closed
Stop valve closed (liquid)
▪ Refrigerant overcharge
▪ Stop valve closed

18 Hand-over to the user

INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
18 Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation at the URL mentioned earlier in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do for the maintenance of the unit.
19

Troubleshooting

19.1 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.
The malfunction code which is displayed on the outdoor unit will
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
Example:
Code
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
Cause
Check stop valve situation or
abnormalities in (field) piping or airflow
over air cooled coil.
▪ Check refrigerant amount+recharge
unit.
▪ Open stop valves
Open liquid stop valve.
▪ Check refrigerant amount+recharge
unit.
▪ Open stop valves.
Example
Solution
Installation and operation manual
35