Gree XK86 Owner's Manual page 28

When enquiring indoor unit parameters, if there are multiple indoor units, press
"IDU–" or "IDU+" to switch different indoor units. Parameters of the corresponding
unit will be shown as below.
When enquiring outdoor unit parameters, if there are multiple outdoor units,
press "ODU–" or "ODU+" to switch different outdoor units. Parameters of the
Wired Controller (XK86 and XE76-33/H)
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