18 Hand-over to the user
Installation and operation manual
38
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1A – 2020.10
NOTICE
Be sure to turn ON the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
3
Make sure the default (idle) situation is existing; see
30]. Push BS2 for 5 seconds or more. The unit
will start test operation.
Result:
The test operation is automatically carried out, the
compressor unit display will indicate "
" and the indication
"Test operation" and "Under centralised control" will display on
the user interface of indoor units.
Steps during the automatic system test run procedure:
Step
Description
Control before start up (pressure equalisation)
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Pump down operation
Unit stop
INFORMATION
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.
4
Check the test operation results on the compressor unit
7‑segment display.
Completion
Description
Normal
completion
No indication on the 7‑segment display (idle).
Abnormal
completion
Indication of malfunction code on the
7‑segment display.
Refer to
"Correcting after abnormal completion
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.
17.3.5
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.
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.
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:
