To Perform A Test Run; Correcting After Abnormal Completion Of The Test Run; To Perform A Sv/Indoor Unit Connection Check - Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual

▪ 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.
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.
19.5.1

To perform a test run

1 Close all front panels to prevent misjudgement (except for the
switch box inspection cover).
2 Make sure all field settings you want are set; see
settings" [ 4 45].
field
3 Turn ON the power to the outdoor unit and the connected
indoor units.
NOTICE
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 46]. Push BS2 for 5 seconds or more.
access mode 1 or
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 and stop valve check
Pipe length check
Refrigerant amount 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.
5 Check the test operation results on the outdoor unit 7‑segment
display.
Completion
Normal completion No indication on the 7‑segment display (idle).
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
"18.1 Making
"18.1.4 To
" and the indication "Test
Description
Description
Completion
Abnormal Indication of malfunction code on the
completion 7‑segment display.
Refer to "19.5.2 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.
19.5.2 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.
19.6 To perform a SV/indoor unit
connection check
This test run can be performed to confirm if wiring and piping
connections between indoor units and SV units are matching.
For the safe operation of the system, it is mandatory to confirm the
wiring and piping connections between the indoor units and SV
units. This can be done either via a thorough manual check or via
the built-in automatic check.
In case group control is implemented over multiple branch ports of
the same SV unit, it is not possible to directly use the built-in
automatic check. Consult this chapter in the Installer and User
Reference guide for extra information.
Below instruction is only related to the built-in check.
SV/indoor automatic connection test run
Operation range for the indoor units is 20~27°C and for the outdoor
units this is –0~43°C.
1 Close all front panels to prevent misjudgement (except for the
switch box inspection cover).
2 Make sure the test run is fully completed without malfunction
code (see "19.5.1 To perform a test
3 To start the SV/indoor unit connection check, make field setting
[2-20]=2 (see "18.1.8 Mode 2: field
start the check operation.
Result: The check operation is automatically carried out, the outdoor
unit display will indicate "
control" and "Test run" will display on the indoor unit user
interface(s).
Steps during the automatic connection check procedure:
Step
Check ON
Control before start-up (pressure equalisation)
Four-way valve initial control
Precooling/preheating start-up
Precooling/preheating operations
Misconnection assessment operation
Pumpdown
Restart standby
Stop
19 Commissioning
Description
run" [ 4 51] to take
run" [ 4 51]).
settings" [ 4 47]). The unit will
" and the indication "Centralised
Description
Installation and operation manual
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