Daikin RQYQ140-180PY1 Service Manual page 98

Field Setting from Outdoor Unit
2.1.6 Air Tight Test Procedure
After internal servicing is performed in the field, 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]
<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.)
2.1.7 Setting of Refrigerant Recovery Mode
When carrying out the refrigerant collection on site, fully open the respective expansion valve of
indoor and outdoor units.
All indoor and outdoor unit's operation are prohibited.
[Operation procedure]
2.1.8 Setting of Vacuuming Mode
In order to perform vacuuming operation on site, fully open the expansion valves of indoor and
outdoor units and turn on some solenoid valves.
[Operating procedure]
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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".
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 instruction attached to the
refrigerant recovery unit for more detail.)
Press Mode button "BS1" once and reset "Setting Mode 2".
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".
SiBE341001
Test Operation