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Unread 08-05-2016, 02:12 AM   #1
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Default oh no another charger question

03 CC 48 volt. PowerDrive Charger, pack voltage is 47.8 volts. AC power checks good. Plug in the charger to cart, after 10 seconds click, hum but no amps. Tried a second charger PowerDrive 2, and it does the same thing except the amp needle has a slight hiccup then sits on zero . plug looks good receptacle looks good. When the charger is on I get 53 volts with VOM hooked to pack positive and negative probe on fuse on receptacle. still only showing 47.8 pack voltage ,charger plugged in and on. Ammeter zero.
So is that enough to say bad OBC? I don't want to throw $300 at it and find out I missed something simple.
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Unread 08-05-2016, 02:20 AM   #2
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Default Re: oh no another charger question

Jump the black wire from the charge receptacle to the negative of the battery pack the charger should work
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Unread 08-05-2016, 08:37 AM   #3
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Default

Quote:
Originally Posted by greg-g View Post
Jump the black wire from the charge receptacle to the negative of the battery pack the charger should work


But be careful, it will not automatically cut off I don't think.
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Unread 08-05-2016, 08:52 AM   #4
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Default Re: oh no another charger question

check the red wire to battery 1. It may have a bad connection.
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Unread 08-05-2016, 12:08 PM   #5
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Default Re: oh no another charger question

Quote:
Originally Posted by greg-g View Post
Jump the black wire from the charge receptacle to the negative of the battery pack the charger should work
Yes I agree but it won't shut off automatically.
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Unread 08-05-2016, 12:09 PM   #6
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Default Re: oh no another charger question

Quote:
Originally Posted by mrgolf View Post
check the red wire to battery 1. It may have a bad connection.
looks good
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Unread 08-05-2016, 01:10 PM   #7
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Default Re: oh no another charger question

A few clarifications:

When You plug the charger into the cart, current flows from pack positive to the charger relay coil and back to the "sense" wire.

So if the relay is clicking, the positive wire and the sense wire are good.

By-passing the "negative" wire has nothing to do with the OBC ability to stop the charge cycle, but it will prevent it from regulating the charge current once the "trigger" voltage level for bulk charge is reached.

The OBC will likely not allow the charging cycle to proceed without detecting current flowing through the OBC hall effect sensor.

What You are really trying to determine is if the SCR inside the OBC that it is in series with the negative charger wire is preventing the current from flowing.

If by by-passing the negative wire allows the current to flow (even if momentarily), then the OBC is bad.

I assume You have already verified the fuse on the back of the charger receptacle is good.
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Unread 08-05-2016, 01:48 PM   #8
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Default Re: oh no another charger question

Quote:
Originally Posted by Sergio View Post
A few clarifications:

When You plug the charger into the cart, current flows from pack positive to the charger relay coil and back to the "sense" wire.

So if the relay is clicking, the positive wire and the sense wire are good.
Yes I agree

By-passing the "negative" wire has nothing to do with the OBC ability to stop the charge cycle, but it will prevent it from regulating the charge current once the "trigger" voltage level for bulk charge is reached.
I understand

The OBC will likely not allow the charging cycle to proceed without detecting current flowing through the OBC hall effect sensor.

What You are really trying to determine is if the SCR inside the OBC that it is in series with the negative charger wire is preventing the current from flowing.

If by by-passing the negative wire allows the current to flow (even if momentarily), then the OBC is bad.
So bypass the negative from the fuse on top of the receptacle to negative on battery pack correct?


I assume You have already verified the fuse on the back of the charger receptacle is good.
Yes fuse is good.
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Unread 08-05-2016, 02:15 PM   #9
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Default Re: oh no another charger question

Quote:
So bypass the negative from the fuse on top of the receptacle to negative on battery pack correct?
Correct, if it works, the OBC is preventing the current flow.
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Unread 08-05-2016, 02:43 PM   #10
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Default Re: oh no another charger question

OK thanks for the help. I'll update later.
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