Using Fluke Meter to Test Air Compressor Motor Capacitors & opening up my SIP One Way Check valve. ⚡
ฝัง
- เผยแพร่เมื่อ 14 มิ.ย. 2024
- In this video I start to investigate why my SIP air compressor keeps tripping the overload breaker. I test both the start and run capacitors with a Fluke 77 IV multimeter which has capacitance testing. ⬇️💥⬇️ Links Below & Donations ⬇️💥⬇️ These turn out to be ok so it's off with the drive belt and onto the one way check valve to see if that's working.
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⬇️Timecodes
00:00 Introduction
00:57 Opening up the Capacitor Box
02:24 Why do motors use capacitors?
04:08 Using a Fluke 77 to test the capacitors
04:52 Testing the Start capacitor
07:37 Testing the Run capacitor
09:06 A word of warning on replacing capacitors
10:23 Testing motor with drive belt removed
11:43 Creating an air leak
12:35 Check valve leaking continuously
13:41 Opening up the check valve
14:52 Photographs of parts
15:22 Still left puzzled !!!
17:14 Compressor seems to be working
17:52 Credits
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Disclaimer:
This video only contains tips and my personal methods that could be helpful when carrying out home car repairs or replacing parts. Coats & Gaiters is not liable for any harm, injury or property damage incurred while carrying out such repairs or replacements, that are a result of incorrect use or misinterpretation of the provided information. This video is for informational purposes only and does not guarantee achievement of a specific result. The user is personally liable for incorrect use of repair equipment, tools or car parts, in particular, when this use poses the risk of injury. Coats & Gaiters strongly advises taking personal care and adhering to all safety rules when doing any repair or replacement. The use on inferior or low quality vehicle parts does not guarantee the proper level of road safety.
#aircompressor #sip #compressor
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Had the same symptoms on an air compressor. Followed your steps and found a small piece of rusty rock or whatever in the one way valve. The tank had never been water drained and there was A LOT of water in the tank. After cleaning the valve and putting it back together it works perfect. Thanks for sharing.
That's great news. Just hope the tank hasn't rusted too much. They can go with a bit of a bang. I sort of get scared now with mine as it's over 10 years old. th-cam.com/video/sm_FJ6Pat4I/w-d-xo.html
Fantastic video clearly explaining the steps and your thought processes. Well Done!
Thank you kindly for saying so.
I want to thank you very much for this video. Before going down the route of buying expensive capacitors I thought I would look on TH-cam for a video with the same symptoms and I came upon your video. Let me tell you I had the same symptoms but only from pressure to re-pressure. I did the exactly same thing you did but sprayed it with a bit of WD-40 and it works like a charm. Thanks again Claudio from Canada
That's great news CC 360. Thank you for the comment.
Another informative video Mark! Ive a smaller Clarke compressor that ive had since about 1993 when I had a car to spray aftr re-build. It has been a faithful companion with only minor maintenace however, one year the overload that cuts the motor off when pressure is reached failed to trip till about 15% over- on occasion it tripped the dump-valve. I replaced the pressure-switch as they warned us apprentices of the dangers compressed air can cause if not respected. I do remember some of my theory classes back in the day!
Thank you Patrick. I did a couple of resprays around 1993/95 with cellulose but then the EU was talking about banning it and only 2 pack would be aloud. Never sure what came of that. I loved paint spraying it was so rewarding watching the panel change colour. You need ideal conditions though or else lol.
You mention some good points to bear in mind with a compressor. I always fear the rusting of the tank and it ripping open.
This is a great learning tool. We'll done. Took my portable air compressor out to blow out the waterlines on my travel trailer yesterday. Turn it on and breaker tripped. Now I know where to look.
Good luck and hope you sort it.
This is very compreensive diagnosis of air compressor i ever seen on youtube.thanks a lot
Thank you for saying so.
Perfect step by step guide on trouble shooting an air compressor, thanks mate!
Thank you for the comment Kieran
A treat to watch, thanks for taking the time.
Thank you for that lovely comment Ron.
Really no one was able to find the problem but you a thousand thanks
Thank you and hope it helped
Great Video
Makes Me think about more than Capacitors Gone!
Thanks for The Upload
Thumbs Up!
Thank you for the compliment. The check valve in the tank seemed to be the issue in the end. Ironically I changed the tank valve and it’s been fine ever since and back in the original capacitor.
Excellent work. Many thanks.
Thank you for saying so
Fantastic explanation!
Thank you
Very good video, nicely explained aswell. 👍
Thank you David
Great troubleshooting procedures
Thank you for saying that Anthony.
It's a very helpful video
Thank you
Great Video , Very informal
Thank you kindly
Waw, you saved me from buying new capacitor 💯
That’s good to hear
This is the best youtube video ever made
Thank you for such a compliment
Brilliant video, thanks
Thank you for saying so
Thank you very well said you would make a great teacher
Thank you for such a compliment.
very good work
Thank you
Thank you so much for the video. I really helped.me a lot because i had the very same problem. I did all the test that u have done except for the last part where u remove the valve and the pipe for the pressure switch. BY the way, was it the lock tile that u put on the nut of the valve?
Thank you for the comment. The problem in the end was that thin black pipe and the little pin valve on the end. Think it was sealant I put on to stop air leaking.
Life saver, have the same compressor, just a bit older and 1 capacitor . Ours used to stall on re starting. The capacitor had blown (40uf off memory) replaced that and it lasted about a week . I didn’t check the valve block / non return valve as the compressor turned over easily by hand with no resistance.
My next port of call and hopefully alls well . 👍😇😁
also check this item "Condor EV 1S Unloader Valve for MDR1 Pressure Switch 226765" If this valve fails it may not allow the air to escape initially while the piston gets momentum up.
Useful vidio
Thank you
Thank u very much sir im from ethiopia please make a vidio about electric connection of single stage compressor
Hi and thank you. Sadly I only have this one compressor.
So pull the belt before diagnosing the capacitors. Got it , thanks.
Hope it helps
Thank you Kind sir,
Hope it helped you
@@CoatsandGaiters Perfect. happy christmas,
@@johncoughlan6540 and all the best to you John for Christmas.
Very helpful video ,I have got a compressor with same symptoms now ,I have replaced the one way valve as the old one had cracks in main seal and is still trip the breaker. I have turned down the pressure control valve under 5 bar and works fine , It would be a good idea to replace the pressure control valve to make it work over 5 bar ?
Many thanks
Mine works most of the time now but still has issues occasionally. My next step would be to replace these " On the underneath of the MDR1 Pressure switch there is an unloader valve with a 6mm push in connection. The function of the unloader valve is to remove the pressure from the piston of a compressor so that when it re-starts it can move freely and prevent the motor from stalling."
The MDR1 pressure switch is supplied with a delayed unloader valve (AEV 1S) as standard.
Thanks alot ,my compressor motor runs when alone but when i put the belt on the machine, it doesnt run ,is it the capacitor
It can be the check valve on the tank or the little thin black pipe going to the switch. If pressure seeps back to the piston the resistance will be too much for the motor to maintain initially.
Hey does it matter how you connect a starting capacitor or is there a certain way it it should be connected ?
I believe you can connect either way as it’s AC voltage so alternates anyway. But I’m no qualified electrician.
You might not hear check valve leaking if unloader valve is not open. Manual release of unloader valve is possible by opening the pressure switch.
Thank you for the info
Great video, nicely explained. I've experienced similar symptoms on a 3hp compressor that runs off normal domestic socket (I'm sure this should have been a 16a socket), it sometimes trips garage circuit breaker or the garage supply from the main board in the house and sometimes both but never the overload switch on the actual compressor itself. It did pop a capacitor few years ago but I did replace run & start caps with caps of the same ratings. At least watching your video has given me some ideas of what to check next 👍
Thank you again for the compliment. Turned out to be the tank one way valve or check valve. I still had a few issues every so often. I thought it cant be the check valve but it was. It's never tripped once since I changed that and I use this daily. I think you also need a healthy spur line going straight to the consumer unit with a 16amp plug.
I have a 25gallon 2 hp craftsman compressor. Mine never trips the unit breaker but mine trips the house breaker. I ordered a check valve and hope that works.. where is the unloader valve located in a compressor? looks like the check valve and unloader valve is the same thing?
The check valve is the copper pipe that feeds the big tank and has a one way valve inside. The unloader valve is tiny on the end of a black pipe going to the electrical switch unit on the compressor. The house breaker may be struggling with the sudden power surge required to start the compressor. There is a large power spike as soon as the compressor starts up.
Very helpful troubleshooting video , I went to a garage sale and bought a very nice 30 gallon compressor in like new condition. I tested it before buying it and it ran and shut off properly . It is a vertical or upright tank unit. Of course I laid it on it's back in my work van to transport home to my shop and it got bumped around . Upon starting it in my work shop , it would run until it reached 95 PSI and trip the breaker .
Now I know where to look after testing the capacitors . P.S. I am a Marine Electrician , years ago I worked in an electrical shop and a careless young man had got a terrible shock from a capacitor
smaller than the ones you were handling . I think your fear and caution was warranted. Thank You for addressing this International problem " I am in Florida USA " Have you ever considered working for the United Nations ? They could use your problem solving skills !
That's exactly what happened to this compressor. It was fine for years, then we moved and it obviously got bumped around in the removal van. Next thing it kept tripping the breaker when pressure was high in the tank. I think my problem solving is driven by my tightness to not spend money unless absolutely essential lol
Could i get some more pictures of the wiring for the both capacitor.messed mine up and looks very similar
Wish it would upload a pic of my wires
Hi I have received your email and the wiring on yours is the same as mine. So yours should be correct. I have Main Power Brown + going to trip, then the black from trip going to a double black on the running capacitor where one of those black wires goes into the motor alongside the grey wire also from the running capacitor. On the other side we have the Main Power Neutral - changing to a Yellow wire going into the motor and next to that yellow wire is a Blue and Grey wire coming out to the Start Capacitor with main earth connected to motor housing. I have emailed 6 photo's to you as well. Check the little black pipe from the one way tank valve that goes to the pressure switch on the tank. That turned out to be my issue of the compressor tripping the trip. I removed the sensor pipe and there is a little spring pin on the end. Make sure the pipe is clear and the pin operating correctly. I blew WD40 down the pipe. Think a bit of grit got down mine and caused the issue.
The valve on the black pipe is called "Condor EV 1S Unloader Valve for MDR1 Pressure Switch 226765" if you search on ebay
The symptom I had was if the tank pressure was lowered by letting some air out it would work fine and the motor wouldn't trip but if it was near max pressure the motor couldn't do it and blew trip. Since clearing that thin black pipe and checking the little pin valve its been running fine ever since.
After removing the black tubing from the one way at the end of the tank,air compressor runs continuously no problems.reconnect the black tubing and compressor runs 10-15 seconds and shuts off,wait for the reset button to click then press and runs only runs again 10-15seconds
Where should i be focusing on?.
Great video mark. Ive just had a capacitor go pop. It made the thermal cut out kick in. The weird thing is its only got one capacitor ( I'm taking it it's start run capacitor. Bad thing is I can't get a reference for the uf but it says 500v
Thank you. I think you can have either a start or run capacitor depending on the start up torque needed by the motor or whether efficiency at rpm is more important.
@@CoatsandGaiters I'm going to get a 500v uf 45. Cpc seem to be good 👍
@@bigblue1402 I think you have to replace like for like. I bought a cheaper capacitor but then read the values must be the same to avoid damaging the motor.
@@CoatsandGaiters cpc's website is rather good. Just going off what I have left of a capacitor and your video (for the uf value)
@@bigblue1402 Hope you get it mended and it works for you.
My compressor starts then stops and cuts the fuse, what can it be? Checked the capacitors all working fine.
It may be the air release valve under the pressure switch. Theres a thin rigid pipe that allows the air to leak initially as the compressor starts. If this doesn't release the pressure in the cylinder is too much and the motor draws heavy amperage and trips. search "Condor EV 1S Unloader Valve for MDR1"
Can you help me? I have a problem with my compressor(Single fase electromotor, 100l tank, similiar to yours in video).. It worked fine for 15 minutes and when it started do run again to fill up air, it started to rotate in reverse order. The switch kills motor instantly and button pops out.. Could it be a one way check valve that is the problem? I just dont understand why would electormotor spin in wrong direction. Thanks in advance!
I’ve not heard of that one but the tank check valve was causing my motor to trip. Maybe the brass check valve on the tank is leaking and your getting a back flow of pressure. I thought my check valve was fine and couldn’t have been the issue but it was. Compressor has worked fine ever since.
@@CoatsandGaiters I checked the valve, cleaned it up and evertyhing but it still runs in wrong direction and stops after 2-3 seconds..
@@KundaCro I did that as well and I swore the valve was ok but it wasn’t
@@CoatsandGaiters Did you buy new one then?
@@KundaCro yes. I think they wear and the spring relaxes
I have a compressor that struggles starting, it has a 60uf and a 65uf capacitor in?
Does it struggle when empty?
@@CoatsandGaiters yes, I have changed the unleader valve and t valve already
Just fyi, yes UK voltage is 220-240VAC, however this is actually RMS voltage, peak voltage is actually sqrt(2)*Vrms which is around 311-339V. This would be one of the main reasons why you couldn't use the 250VAC capacitor. It would essentially blow up as it overvoltages.
arrrr thank you for explaining that. I did wonder.
Hey! Nice, cheap fix :)
I've never had one of these type of capacitors that had a charge after taking it off. They very quickly bleed off their charge through the motor winding after being powered off. It's still ofcourse best practice to not touch the terminals and safely discharge them, in case for instance the windings were open. Even then it's still AC passing throught them, so it's likely they won't have much of a charge anyway.
So how exactly does the depressuring of the piston work? Whenever there's no pressure in the air release pipe, some actuator opens a valve in the compressor, depressurizing the cylinder?
All the best!
Darn did I say that? like you say it would discharge through the secondary winding and charge very rapidly as soon as power is applied. My first comment had to be from a smart person catching me out didn't it haha. The depressurising takes place with a little solenoid valve as I understand in the pressure switch housing. It closes when powered on and then drops open when power is cut off. Thank you and all the best to you and no more catching me out lol
@@CoatsandGaiters
haha, I don't feel at all like catching you out! :)
I did feel a bit like a pedant when writing that comment, but YT comments seem to be a playground for knowitalls, and let's face it: most people with technical interests are smartasses anyhow :D
I definitely think it's wise to treat every cap as a shock hazard anyway!
Thanks for the explanation and another thorough, detailed video!!
All the best from snowy Belgium!
@@koffibanan3099 I try so hard to research anything I put into a video and it just shows you. Never put something into a video if you wouldn't put your life on it being right. This is another valuable lesson I have learnt. Can only make my video's more accurate in the future ....... I hope. Thank you again ....from the cold UK.
Smoll Weel electric engine what size is .....???
th-cam.com/video/Fq8NfJk6thY/w-d-xo.html ------- 2.2Kw
@@CoatsandGaiters size wheel cm ?? 10 ?? Or less ...smoll wheel belt !! Size cm
SO Did you ever find the problem?
In the end it was the little black pipe with the unloader valve on the end which went to the pressure switch. Think grit got into it and stopped the tiny pin from moving up and down against the pressure switch. I sprayed wd40 and air into the pipe to clean it and so far it's been working. The clue was it always worked when the tank pressure was half but tripped when the air pressure was higher.
Why won’t compressor suppliers tell people what size of capacitors are fitted to there motor I had a. Problem with my own which we’re old and blown all the company had To do was remove the lid and note the capacitors details mine were not legible
That would be an issue but you can normally get the schematic on the item and it will have the values on that.
Solve the problem of stopping the compressor before charging
The problem turned out to be the air tank check valve.
@@CoatsandGaiters thank you
Useful vidio
Thank you