Checklist During Commissioning; About Test Run; To Perform A Test Run (7-Leds Display); Correcting After Abnormal Completion Of The Test Run - Daikin RXYSQ5T8VB Installation And Operation Manual

7.3

Checklist during commissioning

To perform a test run.
7.3.1

About test run

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.
Make sure to carry out the system test operation after the first
installation. Otherwise, the malfunction code
the user interface and normal operation or individual indoor unit test
run cannot be carried out.
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.
7.3.2

To perform a test run (7-LEDs display)

1 Make sure all field settings you want are set; see
field settings" on page 17.
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 "6.1.4 To access mode 1 or 2" on
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
Control before start up (pressure
equalisation)
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Pump down operation
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482275-1 – 2017.04
will be displayed on
"6.1 Making
page 18. Push BS4 for 5
Description
Step
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
Normal
completion
Abnormal
completion
Refer to "7.3.3 Correcting after abnormal
completion of the test run" on page 23
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
7.3.3 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.
7.3.4

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.
8

Troubleshooting

8.1 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, the error code is displayed on the
user interface of the indoor unit.
8 Troubleshooting
Description
Description
to take
Installation and operation manual
23