Service Manual

SiUS281811E Field Settings from Outdoor Unit
Part 5 Field Settings and Test Operation 151
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
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 No.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.
(1) In setting mode 2 with units in stop mode, set the item No.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.