Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 97

SiBE341027
2.1.7 Air Tight Test Procedure
After internal servicing is performed onsite, perform the air tight test. Fully open the electronic expansion
valves of the outdoor unit and indoor unit, and turn ON some of the solenoid valves.
[Operation procedure]
With the system stopped, use "Setting mode 2" and set (A) Refrigerant recovery / vacuuming mode
(setting item No. 21) to "ON".
All of the indoor unit and outdoor unit electronic expansion valves fully open and some of the solenoid
valves turn ON. (H2P blinks to indicate the test operation, and the remote controller displays "TEST
OPERATION" and "UNDER CENTRALIZED CONTROL", thus prohibiting operation.)
Close the stop valves on the gas side and liquid side, and perform an air tight test at 4.0 MPa.
Press the MODE button (BS1) to cancel "Setting mode 2".
<Caution>
Do not turn off the outdoor unit power during the air tight test.
(The solenoid valves will close and the outdoor unit air tight test will not be possible.)
2.1.8 Setting of Refrigerant Recovery Mode
When carrying out the refrigerant recovery onsite, fully open the respective expansion valve of indoor and
outdoor units.
All indoor and outdoor unit's operation are prohibited.
[Operation procedure]
In setting mode 2 with units in stop mode, set "Refrigerant recovery / Vacuuming mode" to ON. The
respective expansion valve of indoor and outdoor units are fully opened and some of solenoid valves
open. (H2P turns to display "TEST OPERATION" (blinks), "TEST OPERATION" and "UNDER
CENTRALIZED CONTROL" are displayed on the remote controller, and the all indoor / outdoor unit
operation is prohibited.
After setting, do not cancel "Setting Mode 2" until completion of refrigerant recovery operation.
Collect the refrigerant using a refrigerant recovery unit. (See the installation manual attached to the
refrigerant recovery unit for more detail.)
Press Mode button "BS1" once and reset "Setting Mode 2".
2.1.9 Setting of Vacuuming Mode
In order to perform vacuuming operation onsite, fully open the expansion valves of indoor and outdoor units
and turn on some solenoid valves.
[Operating procedure]
With Setting Mode 2 while the unit stops, set "Refrigerant recovery / Vacuuming mode" to ON. The
expansion valves of indoor and outdoor units fully open and some of solenoid valves open.
(H2P blinks to indicate the test operation, and the remote controller displays "TEST OPERATION" and
"UNDER CENTRALIZED CONTROL", thus prohibiting operation.)
After setting, do not cancel "Setting Mode 2" until completion of vacuuming operation.
Use the vacuum pump to perform vacuuming operation.
Press Mode button "BS1" once and reset "Setting Mode 2".
Test Operation
Field Setting from Outdoor Unit
87