Panasonic Urban Multi MX1R Series Service Manual page 308

PACD011001C2
1.4.4 Additional Refrigerant Charge Operation Procedure
[Work procedure]
1. Conduct a normal refrigerant charge operation.
∗ Conduct the following operation only when the required amount of refrigerant could not be supplied by a
2. Turn on the main switches of the indoor and outdoor units, and fully open the gas-side stop valve.
3. Set the service mode.
In setting mode 1, depress NEXT PAGE button for 5 seconds to set to setting
mode 2.
Press OPERATION button to set LEDs for additional refrigerant charge
operation indication.
Press CONFIRM button.
Press OPERATION button to set LED indication as shown at the right.
Press CONFIRM button to enter setting.
Press CONFIRM button again to start operation.
Low pressure level is indicated during operation.
Indication after operation stops (operation stops after 30 minutes).
(Flashing LEDs indicate pressure level immediately before operation stops.)
4. The additional refrigerant charge operation is complete when the required amount of refrigerant is
5. Remove the refrigerant charge hose, then fully open the liquid-side stop valve.
1.4.5 Refrigerant Recovery Mode
∗ This mode holds the electronic expansion valves of indoor and outdoor units fully open for the recovery
[Work procedure]
1. Stop air conditioner operations.
2. Set the service mode.
In setting mode 1, depress NEXT PAGE button for 5 seconds to set to setting
mode 2.
Press OPERATION button to set LEDs for refrigerant recovery mode
indication.
Press CONFIRM button.
Press OPERATION button to set LED indication as shown at the right.
Press CONFIRM button to enter setting.
Press CONFIRM button again to set to initial condition.
3. Turn off the main switches of the indoor and outdoor units.
4. Conduct a refrigerant recovery operation.
∗ Cancel the setting in the setting mode, or cancel the mode by resetting the outdoor unit using the power
Test Operation Urban Multi "MX1R, ME1R Series" Using R-407C
With the outdoor unit stopped, charge refrigerant from the service port of the liquid-side stop valve.
(Keep the liquid-side and gas-side stop valves open.)
charge operation performed with the outdoor unit in non-operating condition.
(Be sure to keep the liquid-side stop valve closed.)
charged. If the charging operation does not complete in 30 minutes, make the settings again and
operate the equipment.
(If the CONFIRM button is pressed during an additional refrigerant charge operation, the equipment
stops operating.)
of refrigerant.
(Be sure to turn off the main switches of all units within 10 minutes after the first unit is turned off.)
switch.
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
8 9 7 7 7 7 7
3.5 k or higher
8 8 7 8 8 8 8
3.5 k or lower
8 8 7 7 8 8 8
2.5 k or lower
8 8 7 7 7 8 8
1.5 k or lower
8 8 7 7 7 7 8
8 8 7 7 7 9 9
This indication shows that
pressure level was "2.5 k or
lower" immediately before
operation stopped.
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{ 7 7 7 7 7 9
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7 7 7 7 9 7
{
7 7 7 7
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7 7 7 7 7 7
Test Operation
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