EcoRenovator  

Go Back   EcoRenovator > Improvements > Geothermal & Heat Pumps
Advanced Search
 


Blog 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 05-08-16, 08:00 PM   #11
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,428
Thanks: 431
Thanked 619 Times in 517 Posts
Send a message via Yahoo to jeff5may
Default

I finished up the install today (for now). I also heated and cooled the outdoors a little to get an idea of how this control functions.

It looks like this now:

I stuck the control panel and a piece of coroplas to the metal cover plate that now covers the new guts. I stuck the remote control to the coroplas with a piece of velcro. Now it is ready to live another lifetime in a new window or wall.

I played around with the remote control, and figured out it doesn't sync with the main unit until you change modes. It has 5 modes: cool, dehumidify, auto, fan, and heat. In heat mode, you have to use the remote to disable or enable aux heat vs. heat pump. In auto mode, you have to set the temperature on the control panel. Changing the temperature with the remote does nothing in auto.

I figured out the unit also has a predictive temperature control loop of some kind built into it. I originally had the thermometer (black plastic covered sensor) fastened to the indoor coil with romex nail clips like most of the window units do. The heating or cooling of the coil would throw off the temperature a little due to the close proximity. Rigged this way, when I set the unit close to the outdoor temperature, the unit did not shut off exactly when the setpoint was reached. The unit would run for a minute or two and overshoot the target temperature a bit. When the compressor cut off, the blower ran for a minute or more. After a couple of these cycles, the sensor was very close to the setpoint by the time the fan shut off.

Attached Thumbnails
Click image for larger version

Name:	IMG_20160508_175226[1].jpg
Views:	451
Size:	496.0 KB
ID:	6941   Click image for larger version

Name:	IMG_20160508_181509[1].jpg
Views:	486
Size:	461.5 KB
ID:	6942   Click image for larger version

Name:	IMG_20160508_181549[1].jpg
Views:	501
Size:	338.6 KB
ID:	6943   Click image for larger version

Name:	IMG_20160508_190748[1].jpg
Views:	2473
Size:	484.5 KB
ID:	6944  
jeff5may is offline   Reply With Quote
Old 05-08-16, 09:24 PM   #12
iamgeo
Apprentice EcoRenovator
 
Join Date: Aug 2010
Location: Lakehills, Tx
Posts: 168
Thanks: 4
Thanked 10 Times in 9 Posts
Default

Quote:
Originally Posted by jeff5may View Post
Iamgeo,

I believe the main, original intention of the manufacturer was to provide an inexpensive solution for window and mini-split owners whose units have suffered a control board failure, keypad failure, struck by lightning, etc. Original, factory control boards are very expensive to replace. Complete system replacement even more not cheap.

Xringer experienced one of these failures recently, and the cheapest, refurbished control board available for his unit is around 300 to 400 dollars (depending on the source). A whole new system is in 4 figure territory. This line of controls will not work with his system, because he has a variable-speed compressor. These controls will only work with single-speed compressors. I'm really glad he shared the link, as this type of control is perfect for the hacked heat pumps I tinker with.
Ok. Now I understand.
iamgeo is offline   Reply With Quote
Old 11-10-16, 04:51 PM   #13
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,428
Thanks: 431
Thanked 619 Times in 517 Posts
Send a message via Yahoo to jeff5may
Default

I was looking through qunda's website and found this:

Model no. QD30
Inverter air conditioner control panel
jeff5may is offline   Reply With Quote
Old 11-10-16, 05:49 PM   #14
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
Default

Seems smallish. Maybe for a 9,000 BTUh system?

Group of QD30 inverter air conditioner control panel general purpose inverter inverter air conditioning control system modification



Not seeing where the IDU connects up.. Or even how that could work..?.

__________________
My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..
Xringer is offline   Reply With Quote
Old 11-10-16, 08:44 PM   #15
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,428
Thanks: 431
Thanked 619 Times in 517 Posts
Send a message via Yahoo to jeff5may
Default

From the description page, this is a versatile control that ccould be rigged a number of ways. It is a slave module that seems to be able to use a number of control modules as an input. It can take a common on/off command or who knows what kind of speed signal. I wish i could read Chinese.

Whatever input signal it takes, it responds by supervising the compressor. It has some thermistor thermometers that I imagine you would fasten to the rig to tell the control board what is reacting how. The chip next to the bridge rectifier looks a lot like the one inside the sanyo that died...high voltage and pwm signal goes in, 3 phase drive signal goes out.

Last edited by jeff5may; 11-11-16 at 08:06 AM.. Reason: words
jeff5may is offline   Reply With Quote
Old 11-11-16, 09:34 AM   #16
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
Default

CN2 looks like it's got frequency step input controls. 5 or 10 Hz up or down. And a common / ground?
Still not seeing the comm line to the IDU.
So maybe those Up & down lines get bumped by a controller that runs the IDU? fed by IR remote..
Or maybe the IDU runs as a Stand-alone, using Fan-mode? (Sanyo IDU works in Fan, without anything but 230vac)..

Is CN3 the 4way-valve control line??

Maybe I can get someone to translate some of this for us. I'll post if I get any info.
__________________
My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..
Xringer is offline   Reply With Quote
Old 06-10-19, 11:07 PM   #17
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
Default

New link: https://www.aliexpress.com/item/32956162411.html

They are making some interesting pcbs these days.. Inverter support!

Universal DC Inverter control system for split air conditioner QD82 Drive strong DC compressor/outdoor/indoor DC fan motor/electronic expansion valve

Scroll down the page to the wiring details...


Amazon has the QD81B version.. https://www.amazon.com/CHUNGHOP-Univ.../dp/B07S89QC4S
__________________
My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..
Xringer is offline   Reply With Quote
The Following User Says Thank You to Xringer For This Useful Post:
jeff5may (06-11-19)
Old 09-01-19, 11:36 PM   #18
ThomSjay
Helper EcoRenovator
 
Join Date: Mar 2011
Location: Sarnia, Ontario, Canada
Posts: 91
Thanks: 8
Thanked 2 Times in 2 Posts
Default

I was just snooping around, and found this thread because it looked interesting.

Maybe I don't know what I'm talking about but, this link https://www.amazon.com/CHUNGHOP-Universal-Controller-Conditioner-Conditioning/dp/B07S89QC4S states that the controller is at a fixed frequency, and therefore no longer an inverter A/C unit. (for Xringer)
__________________
TomS

Last edited by Daox; 09-02-19 at 09:12 AM..
ThomSjay is offline   Reply With Quote
Old 09-02-19, 10:24 AM   #19
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
Default

Because of the DC motor design, the boards have to be 'inverter' type controllers.
But, the frequency of the controlling clocks (which controls the RPMs of the motors) will become fixed. The OEM boards vary the RPMs, thus control the amount of power being used.
My Living room Unit will use 1200w when it starts and then drop down to 470w after the room starts to cool. Then will drop to just a few watts when the room is at target temp.

Buying one of these 24k BTUh replacement boards is risky, because it might run the old Sanyo at a full 24k BTUh, sucking down full power until the thermostat shuts it off. Meaning it would work a lot like Old-Tech USA HVAC.
Not really desirable, but maybe better than nothing.
What would be great, if one could manually adjust the Fixed frequency. Make it run at RPMs in a lower power range. Like 400 to 800 watts.
Which would never deliver the full 36k BTUh heating or 24k BTUh cooling the Sanyo hardware is capable of, but it would be satisfactory for the average day.

Running this old Sanyo at full RPMs, would work. But, because it can produce almost instant cooling or heat in a large area. It might easily over-heat or cool rooms real fast. Blasting out 36,000 BTUh of heat when only 12,000 are really needed.. LOL!
(Spec on 24k Sanyo is 24k cooling and 36k BTUh heating)..

Cheers,
Rich
__________________
My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..
Xringer is offline   Reply With Quote
Old 09-02-19, 07:56 PM   #20
ThomSjay
Helper EcoRenovator
 
Join Date: Mar 2011
Location: Sarnia, Ontario, Canada
Posts: 91
Thanks: 8
Thanked 2 Times in 2 Posts
Default

Thanks.
I wish that I understood the systems. In my mind it should be easy to configure an Arduino or RPi to receive the clock signal and vary an output to drive an SSR (or several) all whilst watching a temp sensor. Anyway, I will back out now before making a mess of the situation.

__________________
TomS
ThomSjay is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:06 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design