4 - 5
2WAY SYSTEM 
Outdoor Unit Maintenance Remote Controller
4
3. Ordinary Display Controls and Functions
Fig. 1
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  All units start/stop (Fig. 1)
<Operation>
 The   (ON/OFF operation) button can be used to 
start and stop all the indoor units.
  •  The LED illuminates if any indoor units is operating.
  •  The LED blinks if an alarm at any of the operating indoor 
units occurs.
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  Cooling/heating change (Fig. 1)
NOTE
  Cooling and heating mode changes are only available 
when all indoor units are stopped.
<Operation>
 The   (MODE) button can be used to change 
between heating and cooling operation.
  •  The display indicates the operating mode of the indoor 
unit with the lowest unit No.
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  All units test run (Fig. 2)
<Operation>
 The   (CHECK) button can be used to start and stop a 
test run for all indoor units.
  •  Press and hold for 4 seconds to turn ON. 
During the test run “TEST” is displayed.
  •  The status of test runs performed from the indoor unit 
remote controller is not displayed on the outdoor unit 
maintenance remote controller.
Fig. 2
LED
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  Double-speed
  •  Do not use for actual operation. 
(Doing so may damage the devices.)
<Operation>
    The timer button 
 can be used to change between 
double-speed and normal operation.
  •  During double-speed operation, the SLEEPING MODE 
 mark is displayed.
SM830204-05_2WAY SYS.indb   5 2015/01/23   11:56:57