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

17 Commissioning
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified in the
requirements" [ 4 26]. Be sure that neither a fuse nor a
protection device has been bypassed.
Internal wiring
Visually check the electrical component box and the
inside of the unit for loose connections or damaged
electrical components.
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
Stop valves
Be sure that the stop valves are open on both liquid and
gas side.
Damaged equipment
Check the inside of the unit for damaged components or
squeezed pipes.
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there
is a refrigerant leak, try to repair the leak. If the repair is
unsuccessful, call your local dealer. Do not touch any
refrigerant which has leaked out from refrigerant piping
connections. This may result in frostbite.
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.
▪ 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.
Installation and operation manual
32
chapter "15.1 Safety device
will be
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 28].
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
mode 1 or 2" [ 4 29]. 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 "
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
Refrigerant amount check
Pump down operation
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
Normal completion No indication on the 7‑segment display (idle).
Abnormal Indication of malfunction code on the
completion 7‑segment display.
Refer to "17.5 Correcting after abnormal
completion of the test
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
VRV IV+ heat pump for high ambient temperatures
"16.1 Making
"To access
" and the indication "Test
Description
Description
run" [ 4 33] to take
RXYTQ8~16U7YF
4P546223-1B – 2020.10