I have a Panasonic split

Heya,

If you open the flap where the filters are on the right there is a emergency button. If you push it once it will put it on cooling at 20degs and push it twice 22degs heating.

Now fault finding,
Get yourself a camera with a LCD screen. Point the LCD screen at the pointer of the remote (it will look like a glass buble). Push a button on the romte and you should be able to see a infa red light on the lcd screen. If you cant the remote is faulty. But if you can you need a new receiver board on your panasonic, contact your panasonic warrrenty department to get someone out to look at it.

Hope this helps, anything else please let me know