hi all,

ive got an email air - dn186h aircon which isnt heating. reading the error codes, the red light is flashing fast, green flashing slowly, and the error states this : F, C & H are 24v input signals

Can someone please let me know what that may mean, and possibly how i could resolve this issue??

Also if anyone has any web links or docs on how best to troubleshoot these particular units, would be greatly appreciated.

Cheers