Badcaps.net Forum
Go Back   Badcaps Forums > General Topics > General Capacitor Questions & Issues
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 10-06-2019, 01:56 PM   #1
Bishop
Member
 
Join Date: Apr 2009
I'm a: Knowledge Seeker
Posts: 85
Default 370 VAC 80/7.5 Flow A/C Cap?

My nephew just called me about a A/C bad compressor cap on his motor home.

It two terminal on top without markings like fan, C or Herm, like a thee terminal. It has two red wires on one terminal and two yellow wires on the other terminal.

Does that mean that the cap is non-polarized, can be wired either way?
Bishop is offline   Reply With Quote
Old 10-06-2019, 08:34 PM   #2
delaware74b
Badcaps Veteran
 
delaware74b's Avatar
 
Join Date: Apr 2009
City & State: Delaware
My Country: USA
Line Voltage: 480VAC 60Hz or Less
I'm a: Knowledge Seeker
Posts: 580
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

On a 2-terminal cap used on AC motors/compressors, they are not polarized. It doesn't matter which terminals are used. Be sure to put 2 red wires on the same terminal or
__________________
Stupidity should be a crime, especially for drivers. I have NO patience for them.
delaware74b is offline   Reply With Quote
Old 10-07-2019, 12:12 PM   #3
Topcat
The Boss Stooge
 
Topcat's Avatar
 
Join Date: Oct 2003
City & State: Salem, MO
My Country: United States
Line Voltage: 240V @ 60Hz
I'm a: Professional Tech
Posts: 12,596
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

ASSuming the line power (or generator output) is 220, don't replace it with anything of less voltage....or else
__________________
<--- Badcaps.net Founder & Owner

Badcaps.net Services:

Premade Capacitor Kits
Badcaps.net Capacitor Master List


Motherboard Repair Services


If you've come here in search of replacement capacitors or repair services, please use the links above.
----------------------------------------------
Badcaps.net Forum Members Folding Team
http://folding.stanford.edu/
Team : 49813
Join in!!
Team Stats
Topcat is offline   Reply With Quote
Old 10-07-2019, 12:47 PM   #4
Bishop
Member
 
Join Date: Apr 2009
I'm a: Knowledge Seeker
Posts: 85
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

He ordered a matching CAP. He just had a few questions about the size, looks, and condition of the old CAP.

If the rest of the board is clean enough this might save the old RV's A/C system.
I'm just glad he's interested enough to look inside the system to see a failure and do something about it and not just toss the entire system in the trash and invest in a replacement unit without trying first.
Bishop is offline   Reply With Quote
Old 10-08-2019, 07:52 PM   #5
Bishop
Member
 
Join Date: Apr 2009
I'm a: Knowledge Seeker
Posts: 85
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

My nephews new CAP came in yesterday and he installed it this evening. He is excited since the A/C came to life and is cooling great again.

His first time to work on an A/C unit and replace a part was successful.

Thanks for help guys.
Bishop is offline   Reply With Quote
Old 10-12-2019, 12:51 PM   #6
sam_sam_sam
Badcaps Veteran
 
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 1,557
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

I just would like to know what UF value was the old capacitor that was in it

I do have one question for you and it this do you run this air conditioner off of a generator ( or a very long excord ) if you do you might look into getting a hard start if compressor seems to have a hard time starting

Or one of these units if you are using a generator

https://www.zillerelectric.com/produ...-32-fla-230vac
__________________
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *


These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board

All of these had CAPs POOF
All of the mosfet that are taken out by bad caps

Last edited by sam_sam_sam; 10-12-2019 at 12:59 PM..
sam_sam_sam is online now   Reply With Quote
Old 10-12-2019, 09:22 PM   #7
Bishop
Member
 
Join Date: Apr 2009
I'm a: Knowledge Seeker
Posts: 85
Default Re: 370 VAC 80/7.5 Flow A/C Cap?

IT was 7.5uf and the replacement is the same voltage and uf.

The old RV was given to him by his father-in-law a few years ago. He has spent hundreds of hours fixing it up to sell it. It's an old Airstream classic.

Like me, he is enjoying the complexities of a RV and it will be near perfect when he finishes it.

I rewired a Holiday Rambler Crown Imperial ten years ago and doubled my money. I was very impressed with that and I learned a lot doing it.

That RV had a gauge for everything. The dash had dozens of gauges. When we brought it home we didn't know the dash lights we not working when we bought it home. The tail lights were out, break light failed and it got dark before we got it home and I used the light from the cell phone to see how fast I was going.
My wife stayed close to the back side in her car to keep the cops from seeing.
Bishop is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:20 AM.
Did you find this forum helpful?