About The Test Run; To Perform A Test Run - Daikin VRV IV+ Installation And Operation Manual

Oil leak
Check the compressor for oil leakage. If there is an oil
leak, try to repair the leak. If the repairing is unsuccessful,
call your local dealer.
Air inlet/outlet
Check that the air inlet and outlet of the unit is NOT
obstructed by paper sheets, cardboard, or any other
material.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Installation date and field setting
Be sure to keep record of the installation date on the
sticker on the rear of the upper front panel according to
EN60335‑2‑40 and keep record of the contents of the field
setting(s).
17.3

About the test run

NOTICE
Make sure to carry out the test run after the first
installation. Otherwise, the malfunction code
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 for incorrect wiring (communication check with indoor
units).
▪ Check of the stop valves opening.
▪ Judgement of piping length.
▪ Gathering reference data for leak detection functionality. If the
leak detection functionality is required, the test run needs to be
executed including a detailed refrigerant situation check. If the
leak detection functionality is NOT required, the test run can skip
the detailed refrigerant situation check. This can be defined by
setting [2‑88].
INFORMATION
The refrigerant situation check cannot be performed
beyond the following limits:
▪ Outdoor temperature: 0~43°C DB
▪ Indoor temperature: 20~32°C DB
Value [2‑88]
0 The test run will be executed including the
detailed refrigerant situation check. After the
test run, the unit will be prepared for leak
detection functionality (for more details, see
"16.2 Using the leak detection
1 The test run will be executed without the
detailed refrigerant situation check. After the
test run, the unit will NOT be prepared for leak
detection functionality.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546220-1C – 2020.10
will be
Description
function" [ 4 38]).
INFORMATION
▪ When [2‑88]=0, the test operation time can take up to
4 hours.
▪ When [2‑88]=0 and the test operation was aborted
before the end, the
the user interface. It is possible to operate the system.
Leak detection function will NOT be available. It is
recommended to re-execute the test operation.
▪ If the autocharge function was used, the unit informs
the user in case unfavourable ambient conditions are
present to gather detailed refrigerant situation data.
When this is the case, the accuracy of leak detection
operation will drop. It is recommended in such a case
to perform the test operation again on another more
favourable moment. In case no "
information was displayed during the autocharging
procedure, it is possible to have reliable data gathering
during the test operation. See ambient limitations in the
information table on
refrigerant" [ 4 30].
In case Hydrobox units or RA DX indoor units are present in the
system, the pipe length check and the refrigerant situation check will
not be performed.
In case Hydrobox units or RA DX indoor units are present in the
system, the pipe length check will not be performed.
▪ 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 (e.g., Hydrobox) 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.
17.4

To perform a test run

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 all field settings you want are set; see
settings" [ 4 34].
field
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
2" [ 4 35]. Push BS2 for 5 seconds or more. The unit
mode 1 or
will start test operation.
Result: The test operation is automatically carried out, the
outdoor unit display will indicate "
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
17 Commissioning
warning code will be visible on
" or "
"Step 6b: To manually charge
"16.1 Making
"To access
" and the indication "Test
Description
Installation and operation manual
39
"