Additional Refrigerant Charge Operation - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
1.10

Additional Refrigerant Charge Operation

[Work procedure]
1. Conduct ordinary refrigerant charge.
„ Conduct the following operation only when the entire amount of refrigerant could not be
2. Turn on the power switches of the indoor and outdoor units, and fully open the gas-side stop valve.
3. Set the service mode.
In service mode 1, press the "MODE" button for 5 seconds to enter
service mode 2.
Press the "SET" button to set the LED indicators to the "additional
refrigerant charge operation" indication.
Press the "RETURN" button.
Press the "SET" button to set the LED indicators as shown at right.
Press the "RETURN" button to end the setting operation.
Press the "RETURN" button again to start operation.
Low pressure level is indicated during operation.
Operation ends (after 30 minutes).
(Pressure level immediately before is indicated by flashing LEDs.)
Push "Mode" button once to complete additional refrigerant change.
4. The refrigerant charge is completed when the specified amount of refrigerant is added. If the refrigerant
5. Disconnect the refrigerant charge hose, then fully open the liquid-side stop valve.
Test Operation UM Combination "MA1R Series" Using R-407C
With the outdoor unit in non-operating condition, charge refrigerant from the liquid-side stop valve
service port.
(Keep the stop valves on both liquid and gas sides closed.)
charged with the compressor in non-operating condition (otherwise equipment damage can
result).
(Keep the liquid-side stop valve closed.)
charge operation is not completed in 30 minutes, make the settings again and restart the operation.
(When the Confirmation button is pressed during additional refrigerant charge operation, the operation
stops.)
8 7 7 7 7 7 7
8 7 8 7 8 7 7
8 7 7 7 7 7 9
8 7 7 7 7 9 7
8 7 7 7 7 8 7
9 9 7 7 7 7 7
Higher than 3.5k
8 8 8 8 8 8 8
3.5k or less
8 8 7 7 8 8 8
2.5k or less
8 8 7 7 7 8 8
1.5k or less
8 8 7 7 7 7 8
8 8 7 7 7 9 9
This LED indication shows that the
operation stopped with pressure
level at [2.5 k or lower].
8 7 7 7 7 8 7
Test Operation
473