The ohms bouncing around in the tenths is normal, the slightest change in probe pressure or tiniest amount of dirt on the terminals or probes will cause the bounce. Another note, all mini splits out there regardless of brand are made in only a few factories. You can generally find parts by searching the numbers found on the boards, etc.
On inverter board.., in some cases especially on Daikin, there is a mkp capacitor which will always be weak or dead after some years of operation. It is a rectangular box shape . .. around 20 uF I guess. The symptom if this cap goes bad is like the compressor tried to rev up and give up. I would check it before going deeper to ipm. It is quite easy to replace with some soldering skill. I hope it helps you in some ways.
I had these same symptoms on a 6 year old mr cool unit and had all the same test results also. It was the board. $165 from Ingram water and air. Only thing I have spent in 6 years on the 3 units I installed all 6 years ago. Maybe just lucky but has saved me a ton.
These systems are going in just about everywhere. My house. Elderly home next door. Each room got one this winter. It has to be because of heating option. Quiet and efficient. Window shakers are garbage heavy and block the one window in their room.
I had a frog that took out a mini split once. It fried itself and the board. Lucky for the customer it was under warranty because those boards are not cheap. I think the unit was less than a year old. The only other time I have had a major issue with an inverter compressor was on a carrier and was told by the tech support that we needed to get a compressor and inverter board, change the board first and then if the compressor is bad, change it.
I was just talking about the boards. Some are simple, those are not. Those big caps on the board, just plain stupid. How are you suppose to check them and replace them? Buy the whole board, no choice unless you break out a soldering iron. Who has time for that? It's an a/c, works on all the same principals. Well it is what it is. Thanks for the video.
Remote controls for indoor units will give you fault codes. Not sure for that brand. Be aware that some caps have enough power to injure or kill. Wait about 10 minutes before touching the inverter board!!!
I find leaks and low charge on most of my mini split calls. Second to that, it's usually board related. I had one the other day that ran but would not cool or heat. The liquid line was icing just after the EEV. Ohm checked the EEV and found it to be electrically sound. A little closer look at the board revealed some burned legs of one of the chips that likely controls the EEV. Error code says IPM board failure so I told the customer it needed a new board. Daikin wanted $980 for the board. Unit was 3 years old and would have been covered under warranty IF he had paid for professional installation. So, he elected to go back to the online retailer to buy another 1.5 ton unit. Lather, rinse, repeat. I think I am going to refuse to service units that are installed by non-licensed individuals. It's so frustrating.
a while back i asked my local HVAC guy if it was a prudent thing to install mini-splits across my home. I live in one of the hottest places in the nation when in the summer it reaches well over 118 degrees. He told me scrap the mini-split and go with the central 5-ton unit which I did. Good decision. !!
Mini splits aren't right for everyone, but if it's just you and your spouse in a large house, it's wasteful cooling the entire house of unused rooms. Now if you have a full house of kids, central is the way to go. The other advantage to mini splits is programabilty, setting individual rooms to desired temps as needed. Hard to do, expensive to install and operate with central forced air. Professionally installed, name brand splits with proper surge protection can last as long, or longer, than a central system. Bonus: if one split goes down, you don't lose cooling or heating in the entire house.
When you say you installed the central 5 ton, did you install a 5 ton inverter unit that kinda looks like this mini split? like with the fan on the side instead of the traditional “trash can” condenser? If so is it worth doing in a place like Arizona with temps around the 118 also?
@@andygomez9025 I have a inverter five ton heat pump. It works like a charm in the south west corner of California. Here it averages around 117 and up to 120 sometimes.
Those splits are a real pain to work on and get to.. No Name units or very little info for diag.. Nightmare. I am thinking we are going to see more and more of these..
Might have to take the board out and flip it over and see if there's any burnt capacitors I have to fix the board itself if you can't get a replacement
Building a new 1600 to 1800 sqft ICF home in the next year in Texas that will be fairly tight. I was considering going with mini split but after seeing many different videos like this one I’m not liking the complexity, reliability and cost of repairs.
A properly (read: professionally) installed name brand unit, with good surge protection in the breaker panel or disconnect, will last a long time. And be more efficient and use less energy as well. And a tip: you mention seeing "many different videos like this one". That is not a good basis to say mini splits break down a lot, are unreliable, or too complex. A video about the millions of units that are working would be boring. You will only ever see videos about repairs and troubleshooting. Same as with cars.
You can check the connection voltages of the compressor by wiring the connection to the voltage information compressor installed on the DCV compressor, also either. The fan of the board is integrated with the motor and it is a dcvolt ,,, you can make a tool to check the infrader board 3 lamps, 220 volts connect 3 parties together and 3 ends of the other connect it on the wires of the inverter compressor to make sure that the rose works
It's a multisplit so it has to be 'complicated' to manage fluid to all 3 indoor units according to each room temperature VRF is way more complex than this one, still very fun to install and work on them
Compressor wont run so tests crankcase heater for earth fault Sees condenser fan running so checks board to see if its got power Compressor wont run, spends ages testing resistance on sensors Turns board over goes "hmmmm" refits board. Everything telling me you never actually diagnosed anything so just ended up guessing "l think" what the problem is.. you might get lucky, you might not... Buy a purpose made inverter compressor checker tool to increase your odds of achieving something If l was the owner watching this video I would refuse the invoice and be looking for a properly trained tech who can actually diagnose faults instead of just wasting time and money up a step ladder Good luck, no one is an expert at everything so better stick to the wind n tin basic stuff or spend decent time watching proper mini splits training video's before accepting that call 👍
The ohms bouncing around in the tenths is normal, the slightest change in probe pressure or tiniest amount of dirt on the terminals or probes will cause the bounce.
Another note, all mini splits out there regardless of brand are made in only a few factories. You can generally find parts by searching the numbers found on the boards, etc.
Very informative. Thanks.
Thanks for Helping take Care of the Residents at the Trailer Park. 👍🙏
A tricky fault Curtis, i look forward to the final repair if you get to do it 🤔 Au
On inverter board.., in some cases especially on Daikin, there is a mkp capacitor which will always be weak or dead after some years of operation. It is a rectangular box shape . .. around 20 uF I guess.
The symptom if this cap goes bad is like the compressor tried to rev up and give up.
I would check it before going deeper to ipm.
It is quite easy to replace with some soldering skill.
I hope it helps you in some ways.
Curtis great troubleshooting a real head scratcher look forward to repair thanks for the video
You bet
Looks like you have a little HVAC friend in Training. 👍🙏
Welcome to the real world of mini split. Must have patience..And good mirco board trouble shooting skills.
If u do get it, I’m curious to know if the board fixed it.
All minisplits need surge protection.
Agreed. We learned the hard way.
Nice work as always Curtis.
Thanks
I would have gone over to the other unit, took the board out of it, and put it in and see if that fixed it
How about doing that and shorting the other board too because something else is causing the problem…. Am sure the customer is going to be happy 😂
@@rolytech212 it was sarcasm
😅
With these type of unit, this is the correct way
I had these same symptoms on a 6 year old mr cool unit and had all the same test results also. It was the board. $165 from Ingram water and air. Only thing I have spent in 6 years on the 3 units I installed all 6 years ago. Maybe just lucky but has saved me a ton.
She sees the pretty colors in your bag, Curtis. Lolol Cute Kid.
With this type of units, its the correct way of checking
I would think with the cost of the service call and parts it would be cost effective to just replace the outside unit. Just a thought.
These systems are going in just about everywhere. My house. Elderly home next door. Each room got one this winter. It has to be because of heating option. Quiet and efficient. Window shakers are garbage heavy and block the one window in their room.
I like her look..."What you talking about Curtis"...
It may be a longer than usual video, but, it's interesting on how you problem solve the malfunction.
This is why I don't take mini split calls.
tough one buddy no name mini split good effort
I had a frog that took out a mini split once. It fried itself and the board. Lucky for the customer it was under warranty because those boards are not cheap. I think the unit was less than a year old. The only other time I have had a major issue with an inverter compressor was on a carrier and was told by the tech support that we needed to get a compressor and inverter board, change the board first and then if the compressor is bad, change it.
I was just talking about the boards. Some are simple, those are not. Those big caps on the board, just plain stupid. How are you suppose to check them and replace them? Buy the whole board, no choice unless you break out a soldering iron. Who has time for that? It's an a/c, works on all the same principals. Well it is what it is. Thanks for the video.
I’m placing my bet on the module. Probably using mosfets to control speeds and probably not cooled the best
Remote controls for indoor units will give you fault codes. Not sure for that brand. Be aware that some caps have enough power to injure or kill. Wait about 10 minutes before touching the inverter board!!!
I find leaks and low charge on most of my mini split calls. Second to that, it's usually board related. I had one the other day that ran but would not cool or heat. The liquid line was icing just after the EEV. Ohm checked the EEV and found it to be electrically sound. A little closer look at the board revealed some burned legs of one of the chips that likely controls the EEV. Error code says IPM board failure so I told the customer it needed a new board. Daikin wanted $980 for the board. Unit was 3 years old and would have been covered under warranty IF he had paid for professional installation. So, he elected to go back to the online retailer to buy another 1.5 ton unit. Lather, rinse, repeat. I think I am going to refuse to service units that are installed by non-licensed individuals. It's so frustrating.
People putting in their own units, and just buying a new one when it breaks is getting more and more common.
What is frustrating is $1000 for a circuit board. Parts should not be made out of unobtanium
It is ridiculous. It’s as if the manufacturers are deliberately building disposable equipment with the hope of not having to distribute parts.
Had one get hit with a power surge during a storm. It was one issue after another. Had to fix one item to find it took out other parts.
a while back i asked my local HVAC guy if it was a prudent thing to install mini-splits across my home. I live in one of the hottest places in the nation when in the summer it reaches well over 118 degrees. He told me scrap the mini-split and go with the central 5-ton unit which I did. Good decision. !!
Mini splits aren't right for everyone, but if it's just you and your spouse in a large house, it's wasteful cooling the entire house of unused rooms. Now if you have a full house of kids, central is the way to go.
The other advantage to mini splits is programabilty, setting individual rooms to desired temps as needed. Hard to do, expensive to install and operate with central forced air.
Professionally installed, name brand splits with proper surge protection can last as long, or longer, than a central system. Bonus: if one split goes down, you don't lose cooling or heating in the entire house.
When you say you installed the central 5 ton, did you install a 5 ton inverter unit that kinda looks like this mini split? like with the fan on the side instead of the traditional “trash can” condenser? If so is it worth doing in a place like Arizona with temps around the 118 also?
@@andygomez9025 I have a inverter five ton heat pump. It works like a charm in the south west corner of California. Here it averages around 117 and up to 120 sometimes.
Hay… Curtis great Job… What type of Body camera setup do you use????
GoPro
That little one is an apprentice in the making. Asking questions and picking up random tools lol
It looked like no one has ever told her, leave that alone. The look on her face was something.
By your customers description and your diagnosis…I believe that the compressor has internal damage….maybe not…I have been wrong before…
Those splits are a real pain to work on and get to.. No Name units or very little info for diag.. Nightmare. I am thinking we are going to see more and more of these..
there's actually a tool to test inverters, I was hoping you'd check the bridge diode as well....just to tick that box.
Why didn't the error code appear on the control panel? Strange.
Granted he's taking an educated guess.
Can do a continuity test to see if it's open or closed
Might have to take the board out and flip it over and see if there's any burnt capacitors I have to fix the board itself if you can't get a replacement
Lol. If it's not dogs, it's kids. Lol
Try and unplug the fan motor and run it with the compressor
60% of the time its the PCB failing every time
How about on the bottom for the data plate…
Same factory as aciq looking. Midea is probably the maker
I call the manufacturer and avoid most headaches on those.
Building a new 1600 to 1800 sqft ICF home in the next year in Texas that will be fairly tight. I was considering going with mini split but after seeing many different videos like this one I’m not liking the complexity, reliability and cost of repairs.
A properly (read: professionally) installed name brand unit, with good surge protection in the breaker panel or disconnect, will last a long time. And be more efficient and use less energy as well.
And a tip: you mention seeing "many different videos like this one". That is not a good basis to say mini splits break down a lot, are unreliable, or too complex. A video about the millions of units that are working would be boring. You will only ever see videos about repairs and troubleshooting. Same as with cars.
Stay with central air minis are junk thro away systems, always changing makers and names discontinued models parts discontinued freaking junk
Putting a PCB like that out in the weather is asking for trouble, if you ask me. Something like that has to be in a conditioned space.
Check indoor wall mount will show error code
I would of walked from this call
You can check the connection voltages of the compressor by wiring the connection to the voltage information compressor installed on the DCV compressor, also either. The fan of the board is integrated with the motor and it is a dcvolt ,,, you can make a tool to check the infrader board 3 lamps, 220 volts connect 3 parties together and 3 ends of the other connect it on the wires of the inverter compressor to make sure that the rose works
Just buy new, the call cost more than the cost of outside unit.
those are 8mm
8mm = 5/16
@@stevea6722 7mm
Hi bro from west Alabama
What’s up?
@@HVACGUY nothing much
Call tech support
Clueless with minisplits man , stick to the regular stuff
99% it’s PCB BOard, just replace it and your problem will be fixed
My god look at the bran wow
Why so complex
It's a multisplit so it has to be 'complicated' to manage fluid to all 3 indoor units according to each room temperature
VRF is way more complex than this one, still very fun to install and work on them
Minis are junk
Compressor wont run so tests crankcase heater for earth fault
Sees condenser fan running so checks board to see if its got power
Compressor wont run, spends ages testing resistance on sensors
Turns board over goes "hmmmm" refits board.
Everything telling me you never actually diagnosed anything so just ended up guessing "l think" what the problem is.. you might get lucky, you might not...
Buy a purpose made inverter compressor checker tool to increase your odds of achieving something
If l was the owner watching this video I would refuse the invoice and be looking for a properly trained tech who can actually diagnose faults instead of just wasting time and money up a step ladder
Good luck, no one is an expert at everything so better stick to the wind n tin basic stuff or spend decent time watching proper mini splits training video's before accepting that call 👍
😂😂😂😂
Mini split inverters are the worst to troubleshoot. And many brands have bad cx service. Cough Daikin cough