To Perform A Sv/Indoor Unit Connection Check - Daikin VRV 5 RXYA8A7Y1B Installer And User Manual

22 | Commissioning

22.7 To perform a SV/indoor unit connection check

Installer and user reference guide
168
INFORMATION
Refer to the installation manual of the indoor unit for detailed malfunction codes
related to indoor units.
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.
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
"22.6.1 To perform a test
3 To start the SV/indoor unit connection check, make field setting [2-20]=2 (see
"21.1.8 Mode 2: field
Result: The check operation is automatically carried out, the outdoor unit display
will indicate " " and the indication "Centralised control" and "Test run" will
display on the indoor unit user interface(s).
Steps during the automatic connection check procedure:
Step
INFORMATION
During the check 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.
During the check, if the following codes are on 7-segment display, the check will
not continue, take actions for correcting.
4
run" [ 166]).
4
settings" [ 148]). The unit will start the check operation.
Description
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
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12