Daikin VRV IV RXMLQ8T7Y1B Series, Installation And Operation Manual

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8 Hand-over to the user
Installation and operation manual
25
RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1 – 2018.07
2 Make sure all field settings you want are set; see "6.1 Making
field settings" on page 20 .
3 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.
4 Make sure the default (idle) situation is existing; see "6.1.4 To
access mode 1 or 2" on page 21 . Push BS2 for 5 seconds or
more. The unit will start test operation.
Result: The test operation is automatically carried out, the
outdoor 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:
In case:
▪ Setting [2-4]=0
▪ OR room temperature ≥25°C:
Step Description
Control before start up (pressure equalisation)
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Refrigerant amount check (NOT in case of
Hydrobox, RA or AHU connection)
Unit stop
In case:
▪ Setting [2-4]=1 or 2
▪ AND room temperature <25°C:
Step Description
Control before start up (pressure equalisation)
Heating start up control
Communication check + Stop valve check
Pre-heating operation (ONLY if setting [2-4]=2)
+ Heating pump down control
Cooling start up control
Unit stop
Note: 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).
Completion Description
Abnormal
completion Indication of malfunction code on the
7‑segment display.
Refer to "7.5 Correcting after abnormal
completion of the test run" on page 25 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
7.5 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.
8 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.
9 Troubleshooting
9.1 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.
Example:
Code Example
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.