5. Outdoor unit maintenance remote control
Normal display functions
•Connect the special service checker wiring to the outdoor unit PCB. The connection is shown in the figure below.
RC (3P, blue)
PCB connector (3P, blue) 
Special service checker wiring
Relay connector (2P, white)
Remote controller Assy
Outdoor unit PCB
*It is not necessary to disconnect the communications line in the
*Setting modes 1 and 2 can be used even when the outdoor unit is independent (when 1 maintenance remote controller is connected to 1 outdoor unit and automatic address setting for the indoor units has not been com- pleted).
*Displays the overall system status for that refrigerant system.
All units start/stop (Fig. 1) | Fig. 1 | |
<Operation> |
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The | button can be used to start and stop all the indoor units. |
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• The LED turns ON when 1 or more indoor units is operating.
• The LED blinks when an alarm has occurred at 1 or more indoor units during operation.
Switching between cooling/heating (Fig. 1) <Operation>
The 
button switches between heating and cooling modes.
•The specifications are equivalent to the heating/cooling input that was
present on earlier outdoor unit PCBs. | Fig.2 |
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• The display shows the operating mode of the indoor unit with the lowest number.
All units test run (Fig. 2) <Operation>
The 
button switches test run ON/OFF for all indoor units.
• Press and hold for 4 seconds to turn ON.
“Test run” is displayed while the test run is in progress.
• Conditions of test runs that are started from the unit remote controller are not displayed on the outdoor unit maintenance remote controller.
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