Mini Split Failure from Electrical Surges, High and Low Voltage! HOW TO SOLVE IT!

In this HVAC Training Video, I show the Full Installation of the KoolGuard 2 Surge Protection and Voltage Monitoring System which helps to Protect Sensitive Electronics such as those found in Inverter Mini-Splits and HVACR Equipment with ECM motors! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
DITEK KoolGuard 2:
www.diteksurgeprotection.com/...
DITEK Surge Protector to mount to the side of the disconnect box:
www.diteksurgeprotection.com/...
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Tools Used In The Video
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Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #koolguard #voltage #monitoring #surgeprotection #surge #sensitive #electronics #minisplit #equipment #ECM
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Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal.

[@acservicetechchannel]

Mini Split Book on Our Website- www.acservicetech.com/mini-split-book Mini Split Book on Amazon- amzn.to/3ytHJSs Mini Split Book on TruTech Tools- www.trutechtools.com/BooksGuides Mini Split E-Book on Google- play.google.com/store/books/details?id=HN-iEAAAQBAJ Mini Split E-Book on Apple- books.apple.com/us/book/id6445178399

[@addisonharms771]

Can you make a video about what meters you like and why they are better than others?

[@jeffmartin6732]

Thank you for the video and education. Just got into mini split units and installed the surge protector disconnect on the first one before seeing this. Couple hundred dollars is worth the peace of mind. Thanks again!

[@mph5896]

Nice. I have had so many surges/electrical problems at my house in the past few years. Blew out an led light, power strip, and washing machine board in that time. Installed a surge panel @ the breaker. That device looks like the way to go for $ unit protection.

[@CybekCusal]

I was a commercial tech for many years and installed a lot of input reactors which condition the power to even out the highs and lows. Mostly for vfds in industrial plants that had a lot of surges when large equipment would turn on and off. It was 575 three phase.

[@trajanbosevski3497]

Excellent explanation love watching your videos

[@anthonygasparini1734]

Great video and a great over, under and surge protector!

[@vahyae]

The way you put the fuse box at 9:26 in was so cool

[@victork3397]

It may look cool, but I would not recommend it. I have broken a disconnect plug doing it this way.

[@jericosha2842]

This is awesome, had no idea it existed. Thanks man!

[@acservicetechchannel]

Glad you enjoyed the video!

[@hectorriveraatiles6594]

Nice torque screwdriver ... very good installation

[@brianmcdermott1718]

Great tech update. Thanks Craig.

[@acservicetechchannel]

Thanks Brian!

[@wasimedoo7994]

Nice piece of equipment I have it back home but we call it a voltage regulator I will like to have one of your information books thanks keep it up God bless

[@rivergate950]

who makes a voltage regulator for less money? this is $200!

[@john0119]

Very Nice Craig, Cost Vs Down Time and Availability now Days 👍

[@nitanraj6509]

Sir I am AC TECHNICAN. U ARE great job I appreciate u work

[@acservicetechchannel]

Thank you very much!

[@Gameboy_Steve]

Great video. Thanks again

[@michaeldower4335]

Great video. Thank you.

[@marianoramirez5435]

Thanks from argentina!

[@thinkingabout19]

I love this guy

[@groverthetoecutter7874]

Brand new fujitsu , installed with surge protector, fried cuicut board , I will purchase cool gaurd, great video

[@rivergate950]

did fujitsu cover under warranty

[@thesilentonevictor]

Great information an skill set

[@acservicetechchannel]

Thanks!

[@gerrycoffey1]

Nice job!!

[@josecerna68]

Great job 👍🏻

[@ducharmehvactraining925]

excellent job thanks!

[@bertellijustin6376]

I wish my HVAAC school had half the resources you guys have. Lincoln land community college is the worst educational experience I’ve ever had. And I went to Comm school in 29 Palms California….

[@pineychristian]

Very good video and looks to be a very good product. I opened link you provided but requires quote to get pricing?

[@WobblingHobGoblin]

Great video. What is your experience with the surge protector wired in parallel? Thanks!

[@Hasanaaziz]

Thanks...very interesting product. I have ques. Please: 1-is it essential for inverter split unit or tropical units? 2-whats the ambinet working temp. Of the product is it above 50c or below according to specifications??

[@realestateservicessaleshea99]

Thanks again for the videos! 🥃🥃🍺🍺🍺🏌🏻‍♀️🎯 Stay safe. Retired (werk'n)keyboard super tech. Wear your safety glasses!

[@acservicetechchannel]

Thanks!

[@michaelpettit1263]

I have an outdoor unit (regular 3 ton heat pump) at the end of about 60 feet of wire in a 120/208 feed. On very hot days it takes a few spinups to get going. The amp clamp shows a very high start surge, but running is fine. Capacitors all fine, regular incoming voltage looks fine. I'm guessing that there is a voltage drop due to the inrush amps on that length of wire and starting out at 208 anyway. Is putting this unit (for protection) and a soft starter (to deal with the inrush/voltage drop) together appropriate?

[@johnshutt2215]

You produce great videos. Lots of good information. I have one quick question after viewing this video. Do you recommend another surge protector for mini split systems? Thanks so much for your time! Please keep the videos coming!

[@johnshutt2215]

I just can’t find KoolGuard

[@johnshutt2215]

I was finally able to find Kool Guard 2. Will this work on a 120 volt mini split system?

[@chesstime356]

Nice video as always I like it…

[@acservicetechchannel]

I'm glad you like it

[@Raulachu]

How did you get your hands on one of those? I can't get it from any local supply shop in Northern California. It kinda pops up here and there but no price or way to get it. I think this will keep one of my customers in Davis out of trouble with his 4 head mini split. The board and DC fan motor for the outdoor unit failed. I blamed the disconnect but seeing this makes me think it will really keep the machine safe.

[@harrytanase1587]

Thank you For the Information. Where can I buy this product?

[@greg6264]

Hi, I'm getting ready to install a Rheem water heater that has a built in heat pump. Do any of you know if the Rheem heat pump water heaters have this kind of protection built in, or if the KoolGuard would be worth installing?

[@scubasteveTN]

Are you able to go back and look at past events?

[@ozziewelcome5612]

Good 👍 👍 👍 👍

[@roceloi]

In europe this type of proteccions are mandatorry after the metter, if you want you can find something similar of hagger, abb or Siemens...

[@tonyc3147]

Awesome product would like to know the actual price and where it can be ordered I don’t want to give out all my info

[@Stezosledec559]

Hello. Can you do video about anti vibration pads under mini split? Thx

[@acservicetechchannel]

Thanks for letting me know what you would like to see!

[@magzxi]

Is there a version for a 120 volt furnace with ECM?

[@johnshutt2215]

Can you use these on a 120 volt mini split system?

[@j.m.hargrove4611]

I have a Cooper hunter minsplit with line in voltage 246. They are saying I need a step down transformer and disclaimed warranty. They said max is 245. Do you think I really need this ? Is 246 really too high? thanks

[@nangpau5175]

hi thanks

[@PBS-nm1uu]

material list for the disconnect would be nice

[@jeffbarron5500]

In a new plant which had 11k amp @ 600v. The engineer was a co. cheapskate,he opted out for 2-500hp AC motors, instead of DC, In no time we found that firing 2 500hp AC motors together would drop the B phase on the grid. By the 3rd grid drop the elec co cut our service until we added 2 soft starts, line conditioners, 200hp sullair to vortex cools all the DC rectifiers. Cost $200k over the int DC setup, by time we were done

[@TheWilferch]

Can this be installed on the outdoor unit of a heat pump system ?.......

[@jkbrown5496]

So would that be a 3 minute delay then the unit might also have a restart delay? Something to consider so you don't get a call back for things not coming back on for 8 or 10 minutes.

[@AZBADBOYz]

Don't forget T-stat delay as well. My Honeywell has a standard 5 minute delay.

[@jerrylockhart3069]

So you can use those for other inverters to take it.

[@romand123]

Can one Kool Guard protect two condenser units?

[@guli41]

Hi where can I buying the power surge power protector koolguard2 Thanks

[@dharseroma8183]

sir i have a question.meaning every time that there is a over or under voltage activity from the power source the unit is shutting down.?thanks for the info..

[@amio_roseto1]

Another Great video, keep going, by the way, where you can buy this product ?

[@acservicetechchannel]

Links are in the description section below! Thanks!

[@johnkoshinski4540]

Supply House 🏠 sells direct.😃

[@techman6431]

This is great it’s digital circuit but how to use where there is 220vAc 50 or 60 cycle please explain Thankyou fro India 19 Dec 2021 2:15pm

[@testos2701]

Will it also soft start the AC unit?

[@sandraledger2612]

Any insurance available if it doesn't do its job?

[@KuntalGhosh]

It does seem to me like that 120v countries have more power surges than 220v countries even in my 3rd world country i do see occassinal high or low voltage (250-190) but never had any power surge. My ups is very sensitive to power surges like turning the tubelight off causes it to freak out and still have not seen it go into battery backup mode while on normal utility.

[@Boz1211111]

May be, i have 230v where i live and it was never wrong voltage as far as i know

[@josejulian5116]

Notice the red wires were reversed from the other 2 colors any reason for that as to the product instructions?

[@rotaxrider]

Would you recommend this especially if your running your Mini split off a back up generator for power outages especially in heat mode?

[@AZBADBOYz]

Considering that this unit is $200.00 plus installation if you can't do it yourself it might not even be worth the extra expense given you likely have a much cheaper unit to begin with. Make sure the generator is an inverter type as well for the cleanest power supply.

[@abnergarcia6252]

What is the name of the torque screwdriver?

[@scha0786]

I installed a mini split in my cargo camper conversion and I have a hardwired voltage monitor/cut out for this exact reason. It was like $300 but we’ll worth it Southwire is the brand. It super nice it has a digital display so you can see live voltage, amps watts. It does the same thing, monitors for over under voltage or short to ground reverse polarity etc and will cut the circuit.

[@acservicetechchannel]

Nice, thanks for the post!

[@Art416]

Can a surge damage the compressor as well

[@bigdee8469]

What is usually the symptom of a mini split that has been under a surge condition? Blown fuses on the board? A locked out board with no other explanation or is there an LED code? Or is this type of surge protector an add-on/preventative device? I only ask because I think ive only ever come across maybe one set of bad fuses on a mini split in my entire career(including my own), and that was because a snow plow had buried it in a huge pile of snow. Thanks.

[@Froggability]

Your right. Most mini split are electrically pretty robust, and many larger units also have a separate power filter PCB

[@sprockkets]

They start acting stupid lol. No really, you don't want to have fun with that issue. Either that or the compressor won't start cause the inverter drive went out.

[@nitanraj6509]

From india. State Punjab

[@Mikecianfrocco]

This was a great video!!! Video production is getting top quality! Will you be at Kalos in Orlando again next year?

[@acservicetechchannel]

Yes, I am planning on it! Thanks Mike!

[@Mikecianfrocco]

@@acservicetechchannel Cant wait to get the gang back together! Ttys

[@wonyoon1931]

How can I buy this KoolGuard?

[@praefectus6492]

Bend the conduit at your mark try make a180 degrees the wires will stay on the bottom of the conduits. Run a pvc cutter over the top lightly it will rip but a little piece grab some snips. Faster than pulling the wires brother

[@acservicetechchannel]

Yes, I actually I do the same with bending the conduit, partially cutting the flexible conduit and then finishing with a knife without nicking the wiring. However, I figured I should show the safer way where there is no possibility in nicking the wire, thanks!

[@Neil-ym8vy]

Do they make these for standard heat pumps and/or outside HVAC units?

[@ditek1773]

As long as the circuit isn't drawing more than 40 amps continuously it will work on a standard heat pump / condensing unit.

[@oneanon]

How do I check the board in my mini split to make sure it is not working.

[@vachehaghnazarian5891]

Having a problem with mini split heatpump. So the indoor Fan work on a very low speed when is set on Heat . From scale of 1 to 10 it blows only 1 . But on Cool mode it works perfectly fine, also the Fan when it’s on ON mode it blows perfectly. But on heat mode the fan isn’t working and you can’t even adjust the fan speed. The condenser outside works fine

[@sprockkets]

Depending on your outdoor temps, the amount of heat it can move inside is very low. The unit knows this and will limit fan speed if your coil isn't getting hot. Or you have other issues.

[@Froggability]

Interesting, but also curious why other countries with millions of AC units don't make use of such power filtering devices at all? Or they have power filter circuit built in

[@zakkaidmello5641]

They use voltage stablizer which is directly connected to the mains ( india style)

[@Froggability]

@@zakkaidmello5641 I notice almost every outdoor pc board has power filter circuitry. So no need to double up on it

[@user-ln7of9gs4s]

@@Froggability if that was true, why are these devices out here?

[@Hurpdurpdipidydoo]

@@Froggability it cleans or evens out the power going to the compressor and motor it doesn’t regulate high or low voltage so this is absolutely necessary

[@douglasthompson2740]

After a power outage does it reset itself or have to be manually restarted?

[@ditek1773]

The kg2 automatically resets after the 3 minute delay

[@ryanevans7253]

This monitor phase? Like L1 120 V and L2 120 V NOT 180 degrees out of phase? I'm looking to see if I can power a 240 V Mini Split with a 5000 Watt inverter off two outlets on the same inverter. The mini split also is inverting AC to DC. I'm thinking the mini split board does not see phase and just needs to see 2 120 V legs. Sorry if this is confusing.

[@user-ln7of9gs4s]

Benjamin made a video on his channel covering this, I believe…

[@catistrolling7333]

Where do you buy this

[@aperlia6603]

I've never removed the conduit before cutting seal tight. I just scour it with pvc cutters, snap it, and use dikes to finish it off. Never had any issues touching conduit inside.

[@acservicetechchannel]

I hear ya and actually I do the same with bending the conduit, partially cutting the flexible conduit and then finishing with a knife without nicking the wiring. However, I figured I should show the safer way where there is no possibility in nicking the wire, thanks!

[@BOOKERT232]

@@acservicetechchannel can you please tell me why you ise UEI meters instead of lets say fieldpiece or fluke. Im new to the field and I've learned so much from your teaching. Please help

[@sprockkets]

@@BOOKERT232 Use what you like. Fieldpiece never had a great reputation for me but others like them. Fluke is expensive but is now riding mostly on reputation. You can get Testo or even others. I like my UEI.

[@hvacsquad4049]

Would you recommend Kool guard 2 over ICM 493 or vice versa?

[@xincai951]

Hello, what did you end up buying?

[@johnwhite2576]

I assume this will work with any outside condenser between required ext shutoff and condenser ?

[@richlikeg3722]

Is there any other similar products out there that does the same thing. Seems this product give no pricing probably because it’s expensive. I know there are three phase protection but I’m looking for two phase

[@sprockkets]

Rectorseal makes one, but it is expensive as well.

[@rivergate950]

did you ever find an answer??? it's $200!

[@havellsgec4578]

Introduce this model ac in India immediately AS soon as possible at market competitive prices

[@wilfredovega577]

Where can you order the kool guard 2 surge device.

[@acservicetechchannel]

I have a link in the description section of the video, thanks!

[@rogerf3622]

Great video. Seems like a nice product but…I wish we could know the price of this product without filling out a form and getting a quote.

[@j.p.8276]

It's about $360.00 on Amazon. Which I consider outrageous.

[@johnaclark1]

@@j.p.8276 It's available on Amazon? I couldn't find it on Amazon.

[@w1swh1]

@@j.p.8276 Yes so do I. Not worth it.

[@ditek1773]

@@j.p.8276 The product is not available on Amazon and is nowhere near $360.00. Are you sure you aren't mistaking it for something else?

[@ManTimeT.V.]

$360 for a good quality surge protector, that can potentially save thousands of dollars in new control boards and HVACR repair costs....is totally worth it. Especially in areas where you may have very unstable supply power.

[@davidb2438]

My pioneer 12000 BTU unit cost me $675 a year ago, not going to spend $360 for this unit, there are surge protectors for a quarter of the cost, maybe not as sophisticated but makes more $ sense

[@sprockkets]

It's for people with $3000 to $10000 inverter systems. Yes, your pioneer unit is cheap. But even they can cost over 3000 for multizone. They can mostly handle voltage issues, BUT, if you have bad line power all the time, you need to protect it.

[@user-ln7of9gs4s]

Brother, surge protectors won’t stop over and under voltage. This does.

[@davidb2438]

@@user-ln7of9gs4s I agree, but willing to take that risk, which I consider low

[@Hurpdurpdipidydoo]

Inverter systems are incredibly sensitive to voltage drops or surges these are actually a great device for companies installing a lot of inverters

[@evatuckjr9091]

Finally got it up and running. The only delays we had was because we realized we needed some extra parts (I’ll list that below) kzbin.infoUgkxihMYiJNXcHdbH-7ihymsLz61l7jVyb5O . So we have a loft where our current hvac just couldn’t seem to keep cool during the summer. We have been using a window unit since we bought this house over 6 years ago (all the houses in this neighborhood were built in the 80’s and majority of the houses built like ours use a window unit). I hate window units because they are just so noisy and the one we had really only cools one side of the loft. I had contemplated upgrading our current HVAC, but with all the rising prices these days, it would take years before saving up enough to do that. With the advice of my father-in-law (used to run an HVAC business), he recommended we get an inverter instead. We thought we bought everything we needed, but there were just a few other parts we didn’t anticipate needing (which is what caused most of our delay). My friend and father-in-law did all the work to get it installed and running and now we have nice cool air circulating nicely throughout the entire loft. It is very quiet and even the outside unit is much quieter than our main HVAC unit. Saved ourselves thousands getting this.

[@blingmotions6996]

Question I know this is a different brand ac but inverters with the E6 error code especially the Gree brand is it possible someone out there know how to fix.. this issue, or who to repair the pcb

[@adrianarthur685]

What type of unit is it? Inverter, non inverter, cassette

[@jerrylockhart3069]

Do you could’ve cut it with the electrical wires inside it wouldn’t of hurt anything if you did it correctly

[@stephwaylonwells3218]

👍

[@acservicetechchannel]

Thanks Waylon!

[@toolfanatic]

👍🏼

[@acservicetechchannel]

Thanks!

[@toolfanatic]

@@acservicetechchannel Thank you for all the great and informal content.

[@squadman3376]

So you are saying that the regular surge protectors installed by HVAC techs on the side of the power box are useless ??

[@icintracom]

that's incorrect. Standard parallel SPD's are very important and protect from any over voltage surge/transient situation. The KG2 was engineered for inverter driven HVAC systems and monitors and protects from both over AND under voltage events

[@KuntalGhosh]

I had lightning strike on my home that killed almost every electrical device . Fans lights tv computer server rack everything was fried but the only things that survive was all 6 of the panasonic inverter mini splits and whirlpool inverter fridge. 😂 , My pc survived cus of a ups. My dads pc did not survive cus his ups was much older model and the ups itself died from the surge. A lot of switching powersupplies survived but their loads did not. Everything that was on lan died including the wifi router that just exploded into bits . Tv died. There was holes on internal chips. Like the lan chip had it's cap blown off. 3 celling fans died , i had to send them for coil rebuild. all in all it was about 3000$ worth of damage but nothing happened to the inverter ac's. I do not have a non inverter anymore. But with my previous experience with air conditioners they typically do survive lightning strike cus the compressor motor just absrobes bulk of the surge.

[@jacoblowe5424]

Is this available in voltage higher than 240 ?

[@ditek1773]

No, it is designed for 120/240V or 120/208V split phase circuits

[@acservicetechchannel]

I believe the highest voltage for this model is 240v presently, thanks!

[@simonac688.]

I dont think customers will agree on dishing out $ 350.00 " inless ⚡️⚡️ issues in 30 years in the AC / heating trade i saw it once and it was due to the transformer called up hydro and they had to change it after a few arguments ⚡️⚡️ but interesting gadget 👍

[@sprockkets]

Nobody had inverter units for the past 30 years except weirdos who bought Trane's unit in the 80s or early 90s. That's why. Kalos requires them on all installs of inverter units, like Carrier Greenspeed. They've solved issues where they had too high voltages come in and the power company will not fix. If you don't account for that you'll keep having a unit break and keep replacing control boards.

[@Hurpdurpdipidydoo]

These new inverter systems should absolutely have these the boards are so sensitive to under and over voltage it burns them up constantly these things just haven’t caught on in the us which is crazy because it is costing companies a lot of money

[@gsfincorporatedinc8760]

I recently failed an American Standard Platinum variable speed compressor unit under warranty that cost me $2400 in labor/freon. The installer suggested I get one of these because I discovered the utility voltage will drop to 210 at times which is probably a death sentence for this unit, if it was running when the voltage dropped. I did have over voltage protection but that was not the issue it seems.

[@NorCal-refrigeration]

🤘⚡️🤘✨✨

[@acservicetechchannel]

Thanks a lot Dave! You rock!

[@mrtopindiantechnical7346]

I am from India and I am AC mechanic and watch your videos want to work near you can my you work Please sir👃👃👃

[@thomasjust2663]

This is why AC inverters are not recommended, they can get easily damaged by power fluctuations which are almost inevitable during thunderstorms

[@michaelcotherman2402]

Sure would be nice if the Kool Guard had a built in disconnect... nobody likes multiple boxes on the wall...

[@johnaclark1]

Is there a product available for anyone to buy? I installed my own minisplit last year which has been working perfectly but I cannot buy this product to protect it.

[@ditek1773]

You can contact us via phone or email and we'll help locate a local reseller/distributor

[@johnaclark1]

@@David-lf2ne On an RV...

[@larryfleming7295]

Does anyone know the price of said item?

[@chrisralston3027]

approximately $190-200

[@tronixfix]

Now show us how to fix the AC

[@adampajcz8719]

So this won't work on 208 volts.

[@ditek1773]

It works on both 120/240 and 120/208 split phase circuits. Both are 120V line to ground, 208V is just 120 degrees out of phase versus 240V being 180 degrees out of phase

[@patbrock7460]

Before circuit breakers their were only fuses to protect the wiring. It should be noted both fuses and circuit breakers protect the size wire in the circuit's 14 ga wire will use a 15 amp fuse or circuit breaker to protect the wire from over heating. 12 ga =20 amp 10 ga 30 amp and 2/0 150 amp , you can have a fart fan drawing 1/2 amp running on a 100 amp line. I checked my chart and they say FUSE size not circuit breaker size. You must be thinking of the little fuse on furnaces they only protect the electronics . So I have 40 years working in HVAC doing industrial and 10 years teaching HVAC. I'm correct your wrong

[@A4dable3]

Why not just install one at main breaker box to protect all appliances in the entire house? Just sayin!!!

[@ditek1773]

It's a great idea to have an SPD (surge protective device) on your main panel, but this device is a voltage monitor wired in series. It also has surge protection capabilities, but is primarily there to keep the equipment from running on input voltage that is too low or too high.

[@acservicetechchannel]

Surge protection breakers are now usually required on new buildings in most states within the US. That isn't the voltage protection switch though that is integrated in this unit, thanks!

[@ParabellumX]

Too much music in the background of this video. I'm sorry; as much as I would have liked to, I couldn't watch the rest of it. 😔

[@darrinburkowske5162]

Or manufactures could just build better equipment.

[@sprockkets]

Equipment is made to work at standard voltages, not outside it. Some have that protection built in but others don't.