Automatic defrost circuit

Xringer · 12-17-13, 11:24 AM

Wow, it's been one year to the day.. It's a LOT colder here this year..
(See the temp chart above from 12/17/2012).

One of my Sanyos did a defrost cycle this morning, but the dew-point wasn't that bad..?.
When it got above 13F, I tried to increase the setpoint (room temp) from 20C to 21C..
But, it was still too cold for living room Sanyo. Too much load and it reset.
I went out and checked, there wasn't any ice..

Maybe the controller's frost detection function can be tricked when the
outdoor temp gets close to the bottom end of it's operational range.

I'm still thinking about building an ice detector, using the TCRT5000 optical gizmo I tested last winter..

12-17-13, 11:24 AM	#36
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Wow, it's been one year to the day.. It's a LOT colder here this year.. (See the temp chart above from 12/17/2012). One of my Sanyos did a defrost cycle this morning, but the dew-point wasn't that bad..?. When it got above 13F, I tried to increase the setpoint (room temp) from 20C to 21C.. But, it was still too cold for living room Sanyo. Too much load and it reset. I went out and checked, there wasn't any ice.. Maybe the controller's frost detection function can be tricked when the outdoor temp gets close to the bottom end of it's operational range. I'm still thinking about building an ice detector, using the TCRT5000 optical gizmo I tested last winter.. Attached Thumbnails __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..