Daikin RTSQ20PY1 Service Manual page 199

SiBE31-801_C
3.2.7 Air Tight Testing Procedure
Carry out airtight testing after the completion of internal service for the system on site. For this
purpose, fully open the expansion valves of indoor and outdoor units and turn ON some of
solenoid valves.
[Testing procedure]
1. While in Setting Mode 2 with the system in a stopped state, set (A) Refrigerant recovery /
2. Close the stop valve of the liquid pipe, suction pipe, high and low pressure gas pipes, and
3. Press the MODE button (BS1) to clear Setting Mode 2 .
<CAUTION>
Do not turn OFF the power supply of the outdoor unit while the airtight testing is in progress.
(Doing so will make the solenoid valves unexcited, thus disabling the airtight testing on the
outdoor unit.)
3.2.8 Setting of Refrigerant Recovery Mode
When carrying out the refrigerant collection on site, fully open the respective electronic
expansion valve of indoor and outdoor units.
All indoor and outdoor unit's operation are prohibited.
[Operation procedure]
3.2.9 Setting of Vacuuming Mode
In order to perform vacuuming operation at site, fully open the expansion valves of indoor and
outdoor units and turn on some solenoid valves.
[Operating procedure]
Test Operation
Vacuuming mode (Setting item No. 21) to ON. The expansion valves of the indoor and
outdoor units will fully open and some of the solenoid valves will be excited. (H2P will
indicate that test operation is in progress (i.e., blink), and the remote controller will display
"Test Operation" and "Under central control), thus prohibiting operation.)
equalizer pipe (only on multi systems) respectively, and then carry out airtight testing at 4.0-
MPa pressure.
In setting mode 2 with units in stop mode, set "Refrigerant Recovery / Vacuuming mode" to
ON. The respective electronic expansion valve of indoor and outdoor units are fully opened.
(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".
Field Setting
188