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Unread 02-05-2015, 10:01 AM   #1
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Default Charging problem

I am having problems getting my cart to charge. 2006 precedent IQ 4x12 48 volt system, with a powerdrive 2 charger. My charger will not come on, when I plug it in the charger clicks but does nothing. The pack voltage is 48.2, all batteries range from 12.2 to 12.5. but when I check voltage at the charge receptacle I am getting 12.8 volts. I Reset the OBC, and I was getting 15.8 then after a few minutes it was back to 12.8. I cleaned connections and checked wires but did not see any thing loose. Has anybody ever seen this, is my OBC shot? Any and all help is greatly appreciated.
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Unread 02-05-2015, 10:20 AM   #2
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Default Re: Charging problem

Take a reading from the charger receptacle positive plug to pack negative.

If You get pack voltage, that means the SCR inside the OBC is shot.

You will need to run both, the sense wire (gray) and a 10ga wire from the negative of the charger receptacle directly to pack negative.

This will allow the charger to run non-stop, so keep an eye on pack voltage and disconnect charger once it gets to 60v.
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Unread 02-05-2015, 04:36 PM   #3
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Default Re: Charging problem

Thanks for the reply Sergio. I forgot to mention but I did try that and I had full pack voltage. So I reckon I will be getting A DPI charger. Thanks again for the Info.
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Unread 02-06-2015, 11:07 AM   #4
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Default Re: Charging problem

Check your AC outlet the charger is plugged into. We do a lot of calls where the GFCI is popped in people's garages. If you have a meter that will do AC, (Carefullyl) check the outlet to make sure it is working right. If you hear the solenoid click, but no amperage being put out, my first place is the AC source. Make sure nobody drove off with the charger on the cart and messed up the supply AC line. It sounds like the cart and the DC ends are working well enough to get it activated.
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Unread 02-09-2015, 07:55 AM   #5
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Default Re: Charging problem

Well I got a another question. I went to do the bypass as Sergio suggested, when I plugged in my work light (to the same drop cord the charger was plugged in to) it was dead. As Cart Sports suggested I was not getting power to the charger. So I got the charger plugged in to power and the charger came on and worked. It charged for 10 hours or so and cut off, like it always has. The question I have is I am still only showing 12 volts on the charge receptacle, but showing pack voltage from receptacle positive to pack negative, do I still have an OBC issue? I am getting ready to buy new batteries, and I do not want to screw up a new battery pack, on account of a half a** working charger/OBC. any and all help is appreciated.
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Unread 02-09-2015, 10:58 AM   #6
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Default Re: Charging problem

You need to take two more readings so we have a complete view of the connections:
Pack Positive to charger receptacle negative side.
Pack positive to charger receptacle sense wire.
The reading You took at the positive to negative on the charger receptacle, assuming the charger was not connected, should have been 5 to 7 volts less than pack voltage.

Assuming all of the jumpers and by-passes are removed and the charger receptacle is connected as normal, does You charger current goes up to 15+ amps when the charging cycle starts?
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Unread 02-09-2015, 05:56 PM   #7
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Default Charging problem

Thanks for the help Sergio, I will check the voltage as you described. Yes the charger pegs the meter on the charger when plugged in. And I never did any jumpers or bypass since the charger came on. Thanks again


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Unread 02-09-2015, 07:33 PM   #8
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Default Charging problem

Ok, I got some readings there are more than you asked for but I figured more info was better than less.

All readings taken with cart In tow.. I charged it Friday night the charger has been plugged in since.

1. Pack voltage- 50.1
2. Bat1- 12.5
3. Bat2- 12.6
4. Bat3- 12.6
5. Bat4- 12.5
6. Receptacle + to pack - 50
7. Receptacle- to pack +. 12.5
8. Sense wire to pack - 0
9. Sense wire to pack + 4.5 volts and after about one second it went to 48.8 volts.

That last one was odd, I did it about 5 times to make sure I wasn't wiggleing it when the voltage jumped. Again thanks for the help


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Unread 02-09-2015, 07:46 PM   #9
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Default Re: Charging problem

Are you using a Low-Z dvm?

A regular voltmeter would not normally draw enough current to trigger the sense wire.
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Unread 02-10-2015, 03:35 PM   #10
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Default Re: Charging problem

That's a new one on me. I don't know what Low Z is. I will check when I get home and see if it says.
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