Daikin VRV IV-S RXYSQ4T8VB Series - Checklist During Commissioning; About the Test Run; To Perform a Test Run (7-Leds Display); Correcting after Abnormal Completion of the Test Run

18 Hand-over to the user
Installation and operation manual
34
RXYSQ4~6T8V/YB(*)
VRV IV-S system air conditioner
4P482275-1B – 2020.10
17.3 Checklist during commissioning
To perform a test run.
17.3.1 About the test run
NOTICE
Make sure to carry out the test run after the first
installation. Otherwise, the malfunction code will be
displayed on the user interface and normal operation or
individual indoor unit test run cannot be carried out.
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
▪ Check of wrong wiring (communication check with indoor units).
▪ Check of the stop valves opening.
▪ Judgement of piping length.
Abnormalities on indoor units cannot be checked for each unit
separately. After the test operation is finished, check the indoor units
one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more details
concerning the individual test run.
INFORMATION
▪ It may take 10 minutes to achieve a uniform refrigerant
state before the compressor starts.
▪ During the test operation, the refrigerant running sound
or the magnetic sound of a solenoid valve may become
loud and the display indication may change. These are
not malfunctions.
17.3.2 To perform a test run (7-LEDs display)
1 Make sure all field settings you want are set; see "16.1Making
field settings"[428].
2 Turn ON the power to the outdoor unit and the connected
indoor units.
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 (H1P is OFF);
see "To access mode 1 or 2"[429]. Push BS4 for 5 seconds or
more. The unit will start test operation.
Result: The test operation is automatically carried out, the
outdoor unit H2P flashes 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 outdoor unit 7‑LEDs
display.
Completion Description
Normal
completion
Abnormal
completion
Refer to "Correcting after abnormal completion
of the test run"[434] to take actions for
correcting the abnormality. When the test
operation is fully completed, normal operation
will be possible after 5 minutes.
17.3.3 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, the error code is displayed 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.
17.3.4 Operating the unit
Once the unit is installed and test operation of outdoor 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.