20 Hand-over to the user
Installation and operation manual
48
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1 – 2022.02
Step
Description
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Refrigerant amount 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.
5
Check the test operation results on the outdoor 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
"19.7 Correcting after abnormal
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
19.7
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.
19.8
To perform a BS/indoor unit
connection check
This optional test run can be performed to confirm if wiring and
piping connections between indoor units and BS units are matching.
Operation range for the indoor units is 20~27°C and for the outdoor
units this is -5~20°C.
1
Close all front panels in order to not let it be the cause of
misjudgement (except the electrical component box inspection
opening service cover).
2
Make sure the test run is fully completed without malfunction
code (see
47]).
3
To start the BS/indoor unit connection check, make field setting
[2-20]=2 (see
"18.1.8 Mode 2: Field settings"
44]). The unit
will start the check operation.
Result:
The check operation is automatically carried out, the outdoor
unit display will indicate "
" and the indication "Centralised
control" and "Test run" will display on the indoor unit user
interface(s).
Steps during the automatic connection check procedure:
Step
Description
Check ON
Precooling and preheating operations
Step
Description
Control before start-up (pressure equalisation)
Four way valve initial control
Heating start up
Misconnection assessment operation
Pumpdown
Restart standby
Stop
INFORMATION
During the check 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.
During the check, if the following codes are on 7-segment display,
the check will not continue, take actions for correcting.
Code
Description
Outside of operation range indoor unit
Outside of operation range indoor unit
Low pressure difference, test cannot be
performed
Wrong indoor unit type connected or error on
remote controller
4
Check the results on the outdoor unit 7‑segment display.
Completion
Description
Normal completion "
" on the 7‑segment display.
Abnormal
completion
Indication of malfunction code on the
7‑segment display.
"19.7 Correcting after abnormal
actions for correcting the abnormality. When
the check is fully completed, normal operation
will be possible after 5 minutes.
20
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.
21
Troubleshooting
21.1
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.
