Been on a few ductless courses, those boards hold around 300vdc after you shut off the power, they always told us it takes about a sec per volt to dissipate, so give it at least 5min before diving in. Good advice for clearing nuisance codes too 👍
All the new modulation equipment is that way now. Minisplits are no different. Wait at minimal 10min. Yes 10 min before diving in or that will be one hot potatoe.
Goooowd stuff Brother Dave. Those PCB boards go bad alot. They don't like voltage spikes. Usually lower voltages kill them. Carrier/Panasonic mimisplits are horrible nowadays for them. Stay safe and be well Brother Dave.
Yea, I was asked to look at a samsung 3 ton a while ago not working. Two boards failed. not very old unit. maybe 5-6 years. no way to test compressor to see if it failed also / locked up without new boards.
@@OcRefrig well you could just ohm out the windings. Even put on a megger. I would have ohm out the power and wire to the indoor. I had a job where electricians did a poor job on their end. Other than that grab holy water and pray for the best! Lol
@@rottiev264 didn’t carrier have a recall on the od fan harness? I know I had to go back and replace several with fusible links to help protect the board from a fan failure.
@@anthony5530 I’ve had this happen on a couple different brands of ductless, LG, Fujitsu, Daikin, Gree. Not sure about the recall you speak of but sounds like a good idea 👍
on Lg when you have same peoblem the manual says check the power if ok or not ,otherwase call Lg service ,anyway after the warranty ends you should forget call Lg service , nice video.
I don’t know why but the older I get I ABSOLUTELY hate having to replace boards on mini splits. Various tech support seem it quite often have you replace the condenser fan motor when doing a board. Glad it went smooth for you.
it's always good idea to "hipot" test the compressor before calling a control board. it could very well have a current leak to ground, which can kill the board and not show up on simple resistance testing with ohm meter. I'd say the off brand mini-splits are meant to be thrown away when broken.
electronics engineer here, those switching FETs (black 3 pin devices at the top of the board) don't look too happy. I'm willing to bet that they went open circuit due to extended thermal stress. these FETs drive the compressor btw, which would explain no output from the drive.
The compressor three phase vfd switching actually occurs in the integrated power module to the right. The bridge rectifier is to left. Those middle two components are curious. The right one almost looks like two pin not three, maybe diode? Maybe they are a mos switch and schottky for some kind of power factor correcting boost citrcuit? Don’t typically see any to220 devices wherever the integrated vfd power modules are employed. for example look at latest generation genteq ecm motor controller boards. silicon consists of bridge rectifier and an STM integrated “power module” vfd/mcu chip..
@@yeliab814 ahh ok makes more sense I had a feeling it might be the module but wasn't sure. I dont deal with high power stuff, I work with FPGA's all day lol. those STM modules look really cool though, I might toy around with some if I get some time.
@@embeddedgirl FPGA’s thats super cool. Yes the modules are really amazing, although the datasheet scared me off. In theory the modules promise greater reliability through defined circuit paths, inherent FET matching built-in switching deadltime control/protection, etc. Time will tell. . As with the latest new things these days, designing around these seems all about writing the software /logic implementation !
@@yeliab814 reliability, yea ok Dave should send them the board to evaluate their claim lol. I'm still willing to bet thermal stress is the cause of its failure,
I fixed my mini split throwing protect compressor code and after figuring it out the cause was that I had used a twin piggy back breaker which I have heard causes no harm but it does because I can put mine back on the tandem and get a code and take it off and working without fail so sometimes it may help to check and make sure
Hello I have a new 36k 4 zone mini split. It sends all units heat when even only one unit should be calling for it, they will all blow barely warm air. If all are calling heat they all blow hot. No zone control on heat. No error code. What could cause that issue?
I have had the outdoor coil sensor measure out fine but had a short which took out the outdoor board. First we replaced the outdoor board which worked for about a month then the sensor shorted the board out again. We replaced the outdoor coil sensor which had arced through the metal housing 👀. I didn't think there was that much voltage to do that but it did and haven't been back.
@@allanbrito13 No as it was dry at the time but had an outdoor coil sensor fault the second time with comms fault on indoor unit. When talking to tech support they sent outdoor coil sensor and outdoor board under warranty. I noticed the burn hole when replacing it.
@@NorCal-refrigeration That’s good These new units are pretty cool a VFD and 2 dc motor speed controllers threw some microprocessors There’s a lot going on
The word " inverter " means. to invert / opposite. You feed in a/c & Get D/c out. Hense to make a change to opposite. inverter can also Feed Dc in & A/c Out. Such as a Car inverter you can buy. Takes Car battery at 12 volts Dc & inverts / changes to the opposite / to A/c.
the compressor does not run on DC, the line voltage (AC) get rectified and smoothed to DC and then chopped to AC again, except now the frequency is not fixed at 50/60Hz, it can change
Good video ! i Wish they had Board tests to actually test the bad board and that way your not just making an educated guess ! / taking a risk of $$$. Board is prob. $300.00 or more. That unit was not that old was it ? i thought you just put that in a little bit ago. i think i remember the video.
You can test the board. As most manufacturers put them in upside down. You can test the pins on thw back side. All you need to know is each sensors ohm values. But remember these units are disposable per design. Parts are only kept for 5yrs now that it.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Been on a few ductless courses, those boards hold around 300vdc after you shut off the power, they always told us it takes about a sec per volt to dissipate, so give it at least 5min before diving in. Good advice for clearing nuisance codes too 👍
Or you can discharge the caps just like with microwaves. That many volts dc especially with high amps can not just shock but kill.
Glad you mentioned about the inverter board being dangerous after powering off. The capacitors hold one hell of a charge that’ll hurt you bad.
All the new modulation equipment is that way now. Minisplits are no different. Wait at minimal 10min. Yes 10 min before diving in or that will be one hot potatoe.
i rememeber when i first started workin with my pops i was a little kid touched a start cap ya ... it was a kicker lmfaoo
Enjoyed the music while you put the puzzle back together. 👍👌
Epidemic sound. I had to buy the subscription so I’m UA-cam legal.
Excellent repair video! Goo to see Tippy back in the game! ;-)
I’m impressed you got a new board that quickly
Air con actually has decent support and is dirt cheap. If your customer registers the equipment it’s a 5 year parts warranty.
Well Done dave. Been telling my boss this for years you cannot go to any mini split system without a service manual.
True they all have different ways of getting codes
Nice job there Dave!
Goooowd stuff Brother Dave. Those PCB boards go bad alot. They don't like voltage spikes. Usually lower voltages kill them. Carrier/Panasonic mimisplits are horrible nowadays for them. Stay safe and be well Brother Dave.
Yea, I was asked to look at a samsung 3 ton a while ago not working. Two boards failed. not very old unit. maybe 5-6 years. no way to test compressor to see if it failed also / locked up without new boards.
@@OcRefrig well you could just ohm out the windings. Even put on a megger. I would have ohm out the power and wire to the indoor. I had a job where electricians did a poor job on their end. Other than that grab holy water and pray for the best! Lol
The Cfan motor also likes to take out those boards. They are sensitive, like a woman 🤣🤣🤣🤣
@@rottiev264 didn’t carrier have a recall on the od fan harness? I know I had to go back and replace several with fusible links to help protect the board from a fan failure.
@@anthony5530 I’ve had this happen on a couple different brands of ductless, LG, Fujitsu, Daikin, Gree. Not sure about the recall you speak of but sounds like a good idea 👍
Out of all my "good" meters, I still use my 35 dollar UNI-T as well. Slim, accurate and reliable.
Indeed
Stick that manual in the truck!
Thanks again for the videos!
🥃🥃🍺🍺🍺🎳⛳
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses!
Good work Super Dave
on Lg when you have same peoblem the manual says check the power if ok or not ,otherwase call Lg service ,anyway after the warranty ends you should forget call Lg service , nice video.
I don’t know why but the older I get I ABSOLUTELY hate having to replace boards on mini splits. Various tech support seem it quite often have you replace the condenser fan motor when doing a board. Glad it went smooth for you.
The board's packaging was hilarious 🤣
Terrible
Great work Dave. I wish you would use your ladder lock on that extension ladder. Only takes a few extra minutes to clamp it on .
nothing to clamp to.
Wish that ladder grip thing worked on roofs like those...
Good ol bungee cord or tool bag strap is the only real good way
Super Dave brings good things to life ... Good vid thx for sharing ...
Super techs are never afraid or think they're too smart to read a tech manual.
Great video. Appreciate it. Where did you order the board from?
Air con mini split in Florida
Disconnect mounted directly on equipment is okay in your area?
it's always good idea to "hipot" test the compressor before calling a control board. it could very well have a current leak to ground, which can kill the board and not show up on simple resistance testing with ohm meter. I'd say the off brand mini-splits are meant to be thrown away when broken.
5 years and done
electronics engineer here, those switching FETs (black 3 pin devices at the top of the board) don't look too happy. I'm willing to bet that they went open circuit due to extended thermal stress. these FETs drive the compressor btw, which would explain no output from the drive.
Outstanding thank you
The compressor three phase vfd switching actually occurs in the integrated power module to the right. The bridge rectifier is to left. Those middle two components are curious. The right one almost looks like two pin not three, maybe diode? Maybe they are a mos switch and schottky for some kind of power factor correcting boost citrcuit? Don’t typically see any to220 devices wherever the integrated vfd power modules are employed. for example look at latest generation genteq ecm motor controller boards. silicon consists of bridge rectifier and an STM integrated “power module” vfd/mcu chip..
@@yeliab814 ahh ok makes more sense I had a feeling it might be the module but wasn't sure. I dont deal with high power stuff, I work with FPGA's all day lol. those STM modules look really cool though, I might toy around with some if I get some time.
@@embeddedgirl FPGA’s thats super cool. Yes the modules are really amazing, although the datasheet scared me off. In theory the modules promise greater reliability through defined circuit paths, inherent FET matching built-in switching deadltime control/protection, etc. Time will tell. . As with the latest new things these days, designing around these seems all about writing the software /logic implementation !
@@yeliab814 reliability, yea ok Dave should send them the board to evaluate their claim lol. I'm still willing to bet thermal stress is the cause of its failure,
That mini split was straight forward unlike a Fujitsu, ever check out that video on Andy Irons
Fujitsu sucks balls
PCB Board hehehe......top job though :)
Love it keep them coming great videos👍🏻
Dave looks like they have been spraying the sky’s there also
Big time
Love it Dave 👍✌️
Is there a surge protector on the disconnect ?.
Great vid Is that the same place you installed in the kitchen too a while back enjoy watching your vids keep posting keepin it 💯 light and fun
Hi bro from west Alabama love ya
What if the board is new but the compressor still won't start? Would you try to repair the compressor or just replace the whole unit?
I fixed my mini split throwing protect compressor code and after figuring it out the cause was that I had used a twin piggy back breaker which I have heard causes no harm but it does because I can put mine back on the tandem and get a code and take it off and working without fail so sometimes it may help to check and make sure
Great work nor cal Dave just wanted to ask your work shoe have you had it for a while ?
Yes I use the same ones
Good video bro... Thx!
Dave where are you at in the Bay Area? I'm having an issue with my unit and would like to schedule a time for you to come by?
What does error code EL OC mean ? Senville 12,000btu Mini Split
Damn hack in moe mini split install from Friday
Hahaha, this is true! Proof is on U tube
Never seen tye wraps used to make a book
To thick for a staple 😂😂😂
Hello I have a new 36k 4 zone mini split. It sends all units heat when even only one unit should be calling for it, they will all blow barely warm air. If all are calling heat they all blow hot. No zone control on heat. No error code. What could cause that issue?
Super mode for the super tech
@ Dave did I miss the part where you put heat sink paste when putting the new board
Sadly I’m sure the way that board was shipped it did not come with any and it probably went back without any. Won’t be long.
The heat sink comes pre installed on these boards.
That’s good to hear! Did you remove the old one just for inspection? Good to hear it was covered. Did they want the old board back?
@@waynecostanza2280 no they didn’t. And yes I took the old one apart
Thank you Dave, I love your video they gives me confidence
Did you put fresh thermal paste on the heatsinks
Heat sink comes installed on new board
@@NorCal-refrigeration oh cool it's just because I saw you remove the old heatsink from the old board but great video
I have had the outdoor coil sensor measure out fine but had a short which took out the outdoor board. First we replaced the outdoor board which worked for about a month then the sensor shorted the board out again. We replaced the outdoor coil sensor which had arced through the metal housing 👀. I didn't think there was that much voltage to do that but it did and haven't been back.
Great info
So you ohmed out the sensor and it came out fine then checked it to ground and saw a reading?
@@allanbrito13 No as it was dry at the time but had an outdoor coil sensor fault the second time with comms fault on indoor unit. When talking to tech support they sent outdoor coil sensor and outdoor board under warranty. I noticed the burn hole when replacing it.
Where are your knee pros??
hey great video. question do you install voltage monitor on these mini split?
No
Flares, drains and boards.....3 biggest most common problems with mini splits.
Yes sir.
lesson #1...install a mitsubishi mini split 😁
They are the best.
I got a question outdoor ambient temperature sensor where can I get one I’m f1 code on aux mini splitter ac But it works good a tonight
Payless mini split . com look em up
@@NorCal-refrigeration ok thanks bro
We have all type of minisplit pcbs
Wait.
I killed power but there are still bulbs lit?
Dammit we didn't cover this in shop class 1987!
Was there warranty? Im suprised that you could get a replacement board.
5 years
My heat stopped working, wiggled many wires bundles and it started to work codes lights pointing to doing that.
The way they cram the wires is terrible
How much did that inverter board cost?
250$ if not warranty
@@NorCal-refrigeration 250$ is pretty cheap for an inverter board not bad
What kind of work pants you wear?
Dickies, Duluth trading flex fire hose
How much is the board?
1 million dollars
No Heat sink compound in box ?
Heat sink comes built on new board.
You should put thermal paste back on it
Definitely would last longer if they run cooler
New board comes with heat sink installed we all good
@@NorCal-refrigeration That’s good
These new units are pretty cool a VFD and 2 dc motor speed controllers threw some microprocessors
There’s a lot going on
90 day warranty baby!
The compressor runs on DC? I thought that an inverter implied AC.
The word " inverter " means. to invert / opposite. You feed in a/c & Get D/c out. Hense to make a change to opposite.
inverter can also Feed Dc in & A/c Out. Such as a Car inverter you can buy. Takes Car battery at 12 volts Dc & inverts / changes to the opposite / to A/c.
Negative. To have an invrrter compressor it runs DC voltage. As the AC voltage will damage the compressor when slowed down.
the compressor does not run on DC, the line voltage (AC) get rectified and smoothed to DC and then chopped to AC again, except now the frequency is not fixed at 50/60Hz, it can change
@@supersussycat Wrong! Its a brushless DC compressor, and by the way once converted, no turning back to ac just dc pulses coming out.
@@sjefoekel6058 and "dc pulses" = AC 😂 they even alternate
i got a daikin mini split ac only 36,000 btu. for sale, i bought it, used for few wks. now in storage unit. looks n works brand new. open to offers
I did not see any support on the lines between the condenser and the roof penetration.
The wind keeps them propped up
@@GOOCHIElicker ya, the winds coming off the ocean can be pretty strong. It will prop them up
I enjoy watching mini videos but they way you went up on the roof. Why?
👍👍👍
🤘⚡️🤘✨✨✨
How do u do the ladder without a bungee? Your balls must give you extra stability lol
I'm in Florida, I imagine people are nicer in Cali,like the girls.Maybe I'm wrong.
If that was a ducted system that board wouldn’t fail
No kidding 24 volt transformer and a contactor, done.
Unsubed cuz refrigeration is for the birds rip norcal
❄💪🇺🇸👍🔥
Good video ! i Wish they had Board tests to actually test the bad board and that way your not just making an educated guess ! / taking a risk of $$$. Board is prob. $300.00 or more.
That unit was not that old was it ? i thought you just put that in a little bit ago. i think i remember the video.
You can test the board. As most manufacturers put them in upside down. You can test the pins on thw back side. All you need to know is each sensors ohm values. But remember these units are disposable per design. Parts are only kept for 5yrs now that it.
@@FlyEaglesFly19111 correct 20,000 run time hours rated. 3.5 years if 24 /7.
@@NorCal-refrigeration good to know. 20,000 Rth