Field Settings for Outdoor Unit (4/5 HP Models) SiAF332111E
120 Part 5 Field Settings and Test Operation
2.4 Setting of Refrigerant Additional Charging Operation
When the outdoor unit is stopped and the entire amount of refrigerant cannot be charged
from the stop valve on the liquid side, make sure to charge the remaining amount of
refrigerant using this procedure. If the refrigerant amount is insufficient, the unit may
error.
1. Turn ON the power of the indoor unit and the outdoor unit.
2. Make sure to completely open the stop valve on the gas side and the stop valve on the liquid
side.
3. Connect the refrigerant charge hose to the service port (for additionally charging the
refrigerant).
4. In the stopped status, set to ON the refrigerant additional charging operation (A) in setting
mode 2-20 (H1P: Turn ON).
5. The operation is automatically started.
(The LED indicator H2P blinks, and Test Operation and Under Centralized Control are
displayed in the remote controller.)
6. After charging the specified amount of refrigerant, press the RETURN (BS3) button to stop
the operation.
The operation is automatically stopped within 30 minutes.
If charging is not completed within 30 minutes, set and perform the refrigerant additional
charging operation (A) again.
If the refrigerant additional charging operation is stopped soon, the refrigerant may be
overcharged. Never charge extra refrigerant.
7. Disconnect the refrigerant charge hose.
2.5 Setting of Refrigerant Recovery Mode
When carrying out the refrigerant collection onsite, fully open the respective electronic
expansion valve of indoor and outdoor units
All indoor and outdoor unit’s operation are prohibited.
Operation procedure
1. While the outdoor unit is not operating, 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.
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