18 English
Basic Operation
Precautions for Selecting the Cool / Heat Changeover Master Indoor Unit
The cool/heat changeover master must be set for a single indoor unit in the following applications ●
(2-Pipe Heat Pump System) (3-Pipe Heat Recovery System)
Indoor unit Indoor unit
A number of indoor units are
connected to a single outdoor unit.
Set any one of the indoor units as the
cool/heat changeover master.
A number of indoor units are connected
to a single Branch Selector unit.
Set any one of the indoor units as the
cool/heat changeover master.
Branch Selector unit:
The Branch Seletor unit is used for
cooling or heat mode selection.
Key Lock
Operation
Confirm and cancel Key Lock settings in the basic display screen.
1
Cool
Return Setting
Set to
74F
Basic screen
Press the
●
Menu/OK button for at least
four seconds while the backlight is
illuminated.
2
Cool
Return Setting
Set to
74F
“ ● ” is displayed.
All buttons are disabled when the keys
are locked.
To cancel the key lock mode, continue ●
pressing Menu/OK button for at least
four seconds while the backlight is
illuminated.
01_EN_3P243520-3E.indd 1801_EN_3P243520-3E.indd 18 9/11/2012 4:12:48 PM9/11/2012 4:12:48 PM
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