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18 Hand-over to the user
4 Check the test operation results on the compressor unit
7‑segment display.
Completion
Normal
No indication on the 7‑segment display (idle).
completion
Abnormal
Indication of malfunction code on the
completion
7‑segment display.
Refer to
"17.3.4 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.
17.3.4
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:
▪ 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
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:
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)
Installation and operation manual
38
Description
run" [ 4 38] to take
Cause
▪ 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.
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 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.
VRV IV compressor unit for indoor installation
Solution
RKXYQ5T8 + RKXYQ8T7Y1B
4P499900-1B – 2021.12
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