Installed this unit approx. three weeks ago and it functioned properly. Now it is no longer functioning. I tried resetting at the breaker box as well as the FASS tab. No success. Looks like I get an error code as follows: The very top indicator light for the light switch blinks in unison with the fan indicator light third from the very bottom. Both flash rapidly for about a second then go out for about four seconds and keep repeating. Can anyone tell me what this error code is and how it may be corrected?