3.2.4 Setting of Refrigerant Additional Charging Operation
When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from
the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using
this procedure. If the refrigerant quantity is insufficient, the unit may malfunction.
Turn ON the power of the indoor unit and the outdoor unit.
Make sure to completely open the stop valve on the gas side and the stop valve on the liquid side.
Connect the refrigerant charge hose to the service port (for additionally charging the refrigerant).
In the stopped status, set to ON the refrigerant additional charging operation A in set mode 2
(H1P: Turn on).
The operation is automatically started.
(The LED indicator H2P flickers, and "Test run" and "Under centralized control" are displayed in the
After charging the specified quantity of refrigerant, press the RETURN button (BS3) 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.
Disconnect the refrigerant charge hose.