วีดีโอ

Those Carriers are junk!

Why not install the copper first and set it to vacuum to win time while its vacuuming you finish the rest great job

Not really an hvac tech myself but mostly working on building automation projects yet I also do some service calls from a distance from my office to figure out what is going on. Fishing for information when dealing with problems is always a fun game. Steps I undertake: -Open the BMS and if there are GUIs created for the sector, open them and do a quick scan on the rooms of the building. Afterwards, narrow down the issue. Usually, i have dealt with lack of cooling on hot summer days, as opposed to the lack of heating during winter, for some reasons. Most of times they were RTUs feeding cool air to VAV damper boxes. The first thing I always notice is that all rooms fed by the same system are at least 2-3 °C above their setpoint (usually around 21-22°C), even if the customer tells you only a few are problematic (ex: 27°C, which is really hot). Either they genuinely had a mechanical problem that needed to be fixed, or sometimes it's just a case of undersized unit. If you see that the unit fails to maintain duct static pressure even when the fan is at 100% speed (because the room controls are all at maximum cooling demand and therefore, maximum airflow) or if all compressors are on and recently maintained but the air is still above 20°C, you can tell right away that the unit is undersized for the building's requirements. Sometimes I stumble upon autonomous units integrated on the BMS's BACnet network that generally give a lot of info, sometime I stumble across ones where we put our electronics on to control them and the equipments have feedbacks for a bunch of stuff (ex a current transducer on the power lines of the blower, compressor, etc...), and sometimes no feedbacks on the real state of equipments, mostly older installations. I have limited skills when it comes to troubleshooting machines physically, but whenever I can, I go fish for info for my colleagues who might be dispatched there.

Good job 👍

Nice jop man

Motor 3 hp

Waiting on a vfd now for a carrier

So THAT’S where the noise was coming from

lol. That motor sounds like grandma’s wind chimes.

Have have some really good content, u should consider gettin a tripod to show yr work/installations, I think that would be cool to see. Keep up the cool videos

Don’t you love where the vfd is mounted. F carrier!!

Nice troubleshooting and video Subcool.

Just enough information so you can out source the motor

Great work man. I wish they came out with that vacuum pump before I bought my Navac. They’re pretty awesome! I finally made my first heating and air video on my channel, hopefully I can reach a few people.

Carrier does have a service/tech bulletin on how to wire around the VFD. This unit appears to be cool only so low voltage control wiring you did should be okay. However, there is already a signal wire in the unit for this purpose, well it is there if there was no VFD. Also, I did not see that the wires ran through the fuses that are in the blower compartment. Maybe it is different on 460VAC, I don't think I have worked on anything over 240VAC that I bypassed the VFD on. The fuses are supposed to still be used but need to be changed to a different type. I usually run the yellow wires that are on the capacitor for the condenser fan motor directly to the contactor instead of to the capacitor. Just my OCD/thing to do.

I have a site with 32 carriers all 25 tons from 2020. We call it the Covid building. Numerous issues from factory that I caught on start up. Watch out for those insulated terminals for the drive. I had a few burn out on me this spring

A bypassed VFD on a carrier? No way! I swear their VFD quality is terrible past few years

Hi, i am a new subscriber nice trobleshooting, the wire was crisp

Great video! (as always)

Is that blue guy A2L compliant? I'm sure the Navac is because I just purchased it

Great job that surprised at they didn’t know chiller were off whole week or having problems l operate a #2 YK York 800 ton chiller we have alarm when chiller go off on an warning or any chiller pump and cooling pumps or any other problems we have the in the utility plant l guess that they doing a big project hated when they upgrade and the cause a problem due to the construction.

They're not the most powerful but the convenience of doing automatic ac jobs out in the field makes it priceless to me. No need for a generator, a converter or extension cord. I bought the 12ah battery so I'm curious how many cars i can do off it.

Only a good tech can make a repair. Any hack can take good equipment and through it in the junk . Those Rheem,Rudd, Weather Kings were good equipment .

What was the subcooling before you added refrigerant? Nice work

Nice video, why didn't you diode test the 6 diodes in that bridge rectifier? A lizard alone wouldn't blow them high current relatively low voltages compared to thousands of volts lines. More than likely IGBTs are blown or the full wave bridge rectifier.

Who wants to to put in a new 5 ton every 10-15 years for $18k

They may save money now, but the unit being that old, they will be paying a lot more in the long run due to it being less efficient and more leaks are likely to show up again before long.

Looks like the H/F vacuum pump works great.

Hopefully no fan, capacitor or compressor goes out in the near future they might blame it on you, usually no good deed goes unpunished, I've done a a couple of less expensive jobs to help a customer out and BAM! they call back that their water heater, on other side of house does not work a day after I repaired the a/c, this really happened to me, just told them to go kick rocks.

What type of megaohm meter was that? Fairly new to HVAC and i appreciate the lessons

Forgot the video, but what is your opinion on the compressor jackets? My unit has one and I still need to clean it.

Better make sure you keep an eye on your superheat. You get it too low you’re gonna flood a compressor

Good work👍 but if the leakage is close to metal part of condenser. It is better to carefully melt the surroundings of metal part touching copper u and then solder copper part No callback no complains . I work as an hvac technicion in kuwait .

Wish you posted the prices.

I didnt watch the video just because I dont find it interesting when you have worked on and replaced god only knows how many units but I did wanna say unless they are stupid rich they are always gonna wanna repair over replacing the unit. I mean I'm the type of guy if my compressor blows up I wanna buy a new compressor than a entire unit😂 **even tho I didnt watch the comment will still help with the algorithm

Love my Hercules vacuum pump I use it on ice machine and walk in coolers and reach in coolers and on ac units . It’s not the fastest but it’s light and works like it should. Half the cost of other brands and just as good with a 5 year warranty on tool and three year warranty on battery and charger

Generally for medium commercial units like that in video takes more than 10 minutes so there is missing facts about the performance on the Navac 2 cfm pump. Is my opinion on that matter😅

Great job, what was the smoke coming from the condensor? Dirty condensor or was it oil from then refrignant lines burning? Like your oldschool scale, i bet it will survive you!

Nice job!!! what a difference a clean coil makes...

All depends on how much you charged them, if you go around making leak repairs for 500 bucks of course the owners will go with repairs.

Been busy....just catching up on videos.....keep it bro...I enjoy the content and the channel

funny, most window units still use copper. besides the midea 5k

I would have stuck a fork in it and moved on, good job though.

Thanks for the video, it was interesting. Was there a huge difference in price between a repair and replacement? thanks,

Just watched the video, and want to say thanks for repairing the problem. I have 37 years of experience in the field, and most guys these days only want to replace the entire system.

Nice work.

I would be challenged to do that without burning a hole through the copper … any suggestions?

Some guys can really perform art with a mixed torch. Good job bud.

They dont make them capacitors like they used to 😅

ive seen several systems installed without a dryer, when the lineset is less than 10ft long. i dont think that is the case in this situation. did someone put a hard start on a scroll compressor smh....