18 Hand-over to the user
Installation and operation manual
33
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P546223-1C – 2021.11
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.
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
Example
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
19.2
Error codes: Overview
In case other error codes appear, contact your dealer.
Main code
Sub code
Cause
Solution
Master
Slave 1
Slave 2
Earth leakage detector activated
Restart the unit. If the problem
reoccurs, contact your dealer.
Earth leakage detector malfunction:
open circuit) - A1P (X101A)
Check connection on PCB or actuator.
High pressure switch was activated
(S1PH, S2PH) - A1P (X2A , X3A)
Check stop valve situation or
abnormalities in (field) piping or airflow
over air cooled coil.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant recharge
unit.
▪ Open stop valves
Stop valve closed (liquid)
Open liquid stop valve.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant recharge
unit.
▪ Open stop valves.
Low pressure malfunction:
▪ Stop valve closed
▪ Refrigerant shortage
▪ Indoor unit malfunction
▪ Open stop valves.
▪ Check refrigerant recharge
unit.
▪ Check the user interface's display or
transmission wiring between the
outdoor unit and the indoor unit.
Electronic expansion valve malfunction
(main) (Y1E) - A1P (X21A)
Check connection on PCB or actuator.
Electronic expansion valve malfunction
(liquid cooling) (Y3E) - A1P (X23A)
Check connection on PCB or actuator.
Electronic expansion valve malfunction
(subcool) (Y2E) - A1P (X22A)
Check connection on PCB or actuator
