Setting Of Refrigerant Recovery Mode; Setting Of Vacuuming Mode; Final Charge Adjustment - Daikin RXSQ24TAVJU Service Manual

SiUS331708EA
2.7

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
(1) In setting mode 2 with units in stop mode, set the item 2-21 (refrigerant recovery / vacuuming mode) to ON.
The respective expansion valve of indoor and outdoor units are fully opened. Test Operation and Under
Centralized Control are displayed on the remote controller, and the indoor / outdoor unit operation is
prohibited.
After setting, do not cancel setting mode 2 until completion of refrigerant recovery operation.
(2) Collect the refrigerant using a refrigerant recovery unit. (See the instruction attached to the refrigerant
recovery unit for more detail.)
(3) Press the MODE (BS1) button once and return to setting mode 2.
2.8

Setting of Vacuuming Mode

In order to perform vacuuming operation on site, fully open the electronic expansion valves of indoor and outdoor
units and turn on some solenoid valves.
Operating procedure
(1) In setting mode 2 with units in stop mode, set the item 2-21 (refrigerant recovery / vacuuming mode) to ON.
The respective expansion valve of indoor and outdoor units are fully opened. Test Operation and Under
Centralized Control are displayed on the remote controller, and the indoor / outdoor unit operation is
prohibited.
After setting, do not cancel setting mode 2 until completion of Vacuuming operation.
(2) Use the vacuum pump to perform vacuuming operation.
(3) Press the MODE (BS1) button once and reset setting mode 2.
2.9

Final Charge Adjustment

The following operation is needed only when the most adequate refrigerant charge for the best performance is
required and the piping length between the outdoor and indoor units is less than 15 m (50 ft). Besides the
conditions above, this final adjustment is unnecessary.
Procedure
(1) While in setting mode 2, set the item 2-20 (Additional refrigerant charge operation setting) to ON. (LEDs: kh)
(2) While in setting mode 2, set the item 2-7 (SC adjustment) to ON. (LEDs: kh)
(3) Cooling operation begins; wait until the compressor achieves charge mode rotation speed.
Charge mode rotation speed achieved:
Charge mode rotation speed not yet achieved:
(4) Charge the refrigerant through the liquid stop valve charge port.
(5) Measure the liquid stop valve temperature. Charging is complete when the temperature reaches the target
subcooling.
24 class
36 class
48 class
60 class
Field Settings and Test Operation
Target subcooling
3.33 ± 0.56°C (6 ± 1°F)
1.11 ± 0.56°C (2 ± 1°F)
6.67 ± 0.56°C (12 ± 1°F)
7.78 ± 0.56°C (14 ± 1°F)
(LEDs: kkhhhhk)
(LEDs: kkhhhhh)
Field Settings from Outdoor Unit
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