Quote:
Originally Posted by S-F
If you dig a little deeper you'll find that it's not so simple. I have a system that's on 24x7 and there are enormous obstacles in controlling a mini split. There is a form of handshake between the remote and the head unit.
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There is feedback. When the room temperature changes,
the remote sends out a data stream to tell the system to take a break, or work harder..
But, my understanding of the Sanyo remote, the data flow is one-way.
The remote sends out the stream and the system acts per it's firmware.
My Sanyo remote sends IR, whenever I push a command button,
(vent angle control, Ions, fan control, temp change & etc)
or every 5 minutes.
In the event of a short grid failure, the Sanyo will come back on and shut down.
But, within 5 minutes, the IR remote will sent it's bust and return the System to it's mode, prior to the grid failure.
If the remote's battery dies, the IDU will switch to using it's built-in thermostat.
But, if there is a short grid fail, the system is going to stay turned off..
Which means that the Fall season is a good time to replace the batteries..
Anyways, I was thinking if you could record all your standard command busts on a PC disk,
then your control program could just pick out the right file and transmit it with an IR LED.
Of course, the PC would need a room temperature sensor.
And the remote control would have to be blocked from interfering..
I'm pretty sure that I could get a wired thermostat for my model Sanyo.
It would require installing a wiring harness inside the IDU..
But, since I have a remote, (and a back-up) I don't see the need for a wired stat..
One other way to intercede into link using the remote,
is to add a temperature change generator to the remote's sensor.
A simple device to trick the remote into thinking the room temperature
had changed, would cause it to send new commands to the IDU..
Like if you had a solar GTI and you wanted to AC to really crank hard after 10AM on a sunny day,
you could place the remote on the rug, in a spot that starts getting sunshine at 10AM..