Gree XK86 Owner's Manual page 46

NOTES:
① Sometimes, some functions may be invalid. Invalid functions are displayed
in grey. Press "▲" or "▼" button will skip the invalid function.
② After Child lock function is ON, wired controller will be back to the
homepage and buttons will be invalid. Unlock the wired controller according
to the hint and buttons will be valid again.
Wired Controller (XK86 and XE76-33/H)
41