Press the a and ┌ simultaneously for 3 seconds. Or press the k button on remote control.
During child lock operation,
Whenever you press any button on display panel, it will immediately display "CL", which means display panel is locked.
All the button on the indoor unit display panel will not work.
But the button on the remote controller will be operated.
Press the a and ┌ simultaneously for 3 seconds again. The unit will respond with beep. child lock operation will removed.