I hav bought a split unit of hisense 2 monthsback i dont how but since 2 days even if i put off the unit with remote there is "FC"sign lit on the unit which does not go off ...the unit model no is AS-18CR4WVVG p;z help me as i fear starting it and it is toooo hot here

Hi and welcome to FixYa, I am Kelly
Your not going to hurt it by using it with the FC being displayed. FC = Filter Clean. This will appear after every 100 hours of use. Your supposed to remove the air filter and wash it. Usually you have to push the right button on the control panel (often labeled mode) and either the UP or DOWN temp arrows for 3 - 5 seconds to get your display back to normal. Pushing the Up arrow at the same time as the MODE switch should get you a Fahrenheit Display. Pushing the Mode button and the Down arrow at the same time should get you a celcius Temp display.
( I am pretty sure you have to do this on the unit and not with the remote. )
Why manufacturers DO NOT put this information in their user manuals is a bit baffling to me as a service tech. HiSense is not the only one that omits this information.

Should the steps above not resolve your FC display call your HiSense Distributor and ask them how to you reset the Filter Clean (FC) Display. They will be able to tell you over the phone.

Like I said in the beginning your not going to hurt it by using it with the FC being displayed. If you change the temp up or down by 1 deg you will see the display for a few seconds then the FC will re-appear until you reset it.

This is the AU Contact data:

Phone: 1800 HISENSE (1800 447 367)
Fax: .
Email: [email protected]

Email them and ask how to reset the FC on the display. Remember you will get this display every 100 hours of operation.

Thanks for choosing FixYa,
Kelly

Pl check it to technician