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No power to bay

W

WashieCarWash

New member
Hi everyone. Looking to get some troubleshooting help.

I have a coleman super saver setup for my 4 bay self service.

Yesterday one of the bays lost power randomly. Here’s what I did to troubleshoot:

1) checked the fuse, wasn’t blown
2) breaker not tripped
3) contactor overload not tripped. I can manually start motor by pushing in contactor
4) bay not getting 24v but all other bays are

Something is not allowing the bay to 24v power but I can’t seem to figure it why. It’s normally a tripped overload on the contactor or a blown fuse but neither of these steps corrected the issue.

All 3 other bays are working fine.
 

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There is no breaker to check. Contactor overload has nothing to do with your low voltage 24ac.

Are you sure you’re checking the right fuse? If you are check for power on the outlet side. If you have power there but not in your meter box then you have a loose of broken wire down the line.
 
Time to get out your volt meter. Go to the transformer, select A/C voltage on the meter and check the primary (input) for 120vac, then check the secondary (output) for 24vac. If you have 24vac coming out of the transformer you can just keep checking further and further downstream. Since you are already in the control cabinet/box for that bay, check both sides of the terminal terminal strip. Then out to the meter box, check incoming 24vac and then wherever it goes after. Check both sides of the disconnect in the meter box , then the 24vac side of the timer etc
 
Blanco said:
There is no breaker to check. Contactor overload has nothing to do with your low voltage 24ac.

Are you sure you’re checking the right fuse? If you are check for power on the outlet side. If you have power there but not in your meter box then you have a loose of broken wire down the line.
Click to expand...

Eric H said:
Time to get out your volt meter. Go to the transformer, select A/C voltage on the meter and check the primary (input) for 120vac, then check the secondary (output) for 24vac. If you have 24vac coming out of the transformer you can just keep checking further and further downstream. Since you are already in the control cabinet/box for that bay, check both sides of the terminal terminal strip. Then out to the meter box, check incoming 24vac and then wherever it goes after. Check both sides of the disconnect in the meter box , then the 24vac side of the timer etc
Click to expand...

Thank you both. I’ve attached a photo of the panel inside. Can you help me pinpoint where I test with the volt meter?
 

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Looks like you have a single transformer for all the bays. I’d jump to the long terminal strip to check voltage. You’ll have to trace the wires back to the transformer to confirm but a good guess is the top black wire is 24vac and the white is neutral. THIS ISN’T ALWAYS CORRECT. If you have 24vac there I would go out to the meter box and check voltage there.
I’m not real familiar with that Mx-8 controller. I helped a guy diagnose one on FaceTime a year or two ago. Some others here may be of more help
 
You said you had a 4 bay set up. On your door your pump stand is a 5 bay. Bay 1 and Bay 5 don’t appear to have power from your indicator lights. Which bay does not have power or both?

There’s five fuse blocks that I will circle. There labeled 1 to 5. IPick which bay and test for power on the incoming and outgoing wire of the fuse blocks to common. They do have indicator lights when blown but sometimes those can go bad.

If you have power there then test between 1 and 2 on both sides of your terminal strip for whichever bay in your pump stand control panel.

If you have power there then check 1 and 2 in your meter box.

If you don’t have power in your meter box then you have a broken or loose wire between your ss unit and your meter box. If you do have power then your issue is after the terminal strip in the box.

Don’t worry about the mx 8 controller. Has nothing to do with this.
 

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Blanco said:
You said you had a 4 bay set up. On your door your pump stand is a 5 bay. Bay 1 and Bay 5 don’t appear to have power from your indicator lights. Which bay does not have power or both?

There’s five fuse blocks that I will circle. There labeled 1 to 5. IPick which bay and test for power on the incoming and outgoing wire of the fuse blocks to common. They do have indicator lights when blown but sometimes those can go bad.

If you have power there then test between 1 and 2 on both sides of your terminal strip for whichever bay in your pump stand control panel.

If you have power there then check 1 and 2 in your meter box.

If you don’t have power in your meter box then you have a broken or loose wire between your ss unit and your meter box. If you do have power then your issue is after the terminal strip in the box.

Don’t worry about the mx 8 controller. Has nothing to do with this.
Click to expand...
Eric H said:
Looks like you have a single transformer for all the bays. I’d jump to the long terminal strip to check voltage. You’ll have to trace the wires back to the transformer to confirm but a good guess is the top black wire is 24vac and the white is neutral. THIS ISN’T ALWAYS CORRECT. If you have 24vac there I would go out to the meter box and check voltage there.
I’m not real familiar with that Mx-8 controller. I helped a guy diagnose one on FaceTime a year or two ago. Some others here may be of more help
Click to expand...

Big thanks to you both. I figured it out.

Looks like another CryptoPay tap to pay device went bad causing it to trip power to the entire bay. I didn’t know because the bulb to the fuse was blown.

I disconnected the tap to pay, put a new fuse it - and it resolved my issue.

This is disheartening because it’s the fourth time this has happened as a result of a bad tap to pay device from cryptopay. Their QA is trash.
 
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