17935 powerdyne amp meter fluctuating

stoker · 01-31-2019, 12:05 PM

i tryed to reboot the OBC but its staying at 5 amps for 30 seconds,then jumps up to 9 amps for a while,then back to 5.i think i read in here that it could be diode pack/rectifier?thanks

PJay · 01-31-2019, 12:10 PM

That's how mine works too. I think it is right.

If yours is broke, so is mine.

PJay

NoleFan4Ever · 01-31-2019, 12:13 PM

Should be fine if it is fully charging the pack and cutting off on its own. The OBC senses the pack and the algorithm controls the charging characteristics.

Sergio · 01-31-2019, 12:21 PM

The issue is that the current should go to 15 amps, even if the batteries are fully charged since the charger voltage should be a lot higher than a fully charged pack (at rest).

Could be a weak(s) battery, charger malfunction or OBC malfunction.

Probably the easiest way to eliminates/test the OBC is to run the negative charging cable directly to pack negative.

If the current on the charger then goes to 15 amps, the OBC is the problem.

If the current does not increase, test the batteries near the end of the charge to see if one is not keeping up in voltage with the other ones.

stoker · 01-31-2019, 01:32 PM

thanks everyone,will let you know what i find

stoker · 01-31-2019, 04:19 PM

well,i found one batt that was suspect,so replaced with good used one.The charger amp meter seemed to stabalize better,but this time i hooked up the fluke DOM,so i could monitor charging.I did notice the amp meter went up to 16 amps this time.when it came down to 5-6 amps i noticed the voltage jumping around 3-4 tenths momentarily,then it would stabilize for about a minute,then cycle back to the 3-4 tenth jump..kept cycling like that?

Sergio · 01-31-2019, 04:41 PM

If the voltage is around 57v, that means the OBC is regulating the current to keep it in the "absorption" voltage range.

stoker · 01-31-2019, 04:43 PM

Quote:

Originally Posted by Sergio

If the voltage is around 57v, that means the OBC is regulating the current to keep it in the "absorption" voltage range.

yup 57.5,but jumping to 58.0 with amp meter around 3amps..normal?thanks

NoleFan4Ever · 01-31-2019, 06:51 PM

Nothing wrong with that OBC....

(Unless it quits turning off....)

01-31-2019, 12:05 PM	#1
stoker Gone Wild Join Date: May 2016 Posts: 225	17935 powerdyne amp meter fluctuating i tryed to reboot the OBC but its staying at 5 amps for 30 seconds,then jumps up to 9 amps for a while,then back to 5.i think i read in here that it could be diode pack/rectifier?thanks
stoker Gone Wild Join Date: May 2016 Posts: 225

01-31-2019, 12:10 PM	#2
PJay Not Yet Wild Join Date: Jun 2014 Posts: 55	Re: 17935 powerdyne amp meter fluctuating That's how mine works too. I think it is right. If yours is broke, so is mine. PJay
PJay Not Yet Wild Join Date: Jun 2014 Posts: 55

01-31-2019, 12:13 PM	#3
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: 17935 powerdyne amp meter fluctuating Should be fine if it is fully charging the pack and cutting off on its own. The OBC senses the pack and the algorithm controls the charging characteristics.

01-31-2019, 12:21 PM	#4
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: 17935 powerdyne amp meter fluctuating The issue is that the current should go to 15 amps, even if the batteries are fully charged since the charger voltage should be a lot higher than a fully charged pack (at rest). Could be a weak(s) battery, charger malfunction or OBC malfunction. Probably the easiest way to eliminates/test the OBC is to run the negative charging cable directly to pack negative. If the current on the charger then goes to 15 amps, the OBC is the problem. If the current does not increase, test the batteries near the end of the charge to see if one is not keeping up in voltage with the other ones.

01-31-2019, 01:32 PM	#5
stoker Gone Wild Join Date: May 2016 Posts: 225	Re: 17935 powerdyne amp meter fluctuating thanks everyone,will let you know what i find
stoker Gone Wild Join Date: May 2016 Posts: 225

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01-31-2019, 04:19 PM	#6
stoker Gone Wild Join Date: May 2016 Posts: 225	Re: 17935 powerdyne amp meter fluctuating well,i found one batt that was suspect,so replaced with good used one.The charger amp meter seemed to stabalize better,but this time i hooked up the fluke DOM,so i could monitor charging.I did notice the amp meter went up to 16 amps this time.when it came down to 5-6 amps i noticed the voltage jumping around 3-4 tenths momentarily,then it would stabilize for about a minute,then cycle back to the 3-4 tenth jump..kept cycling like that?
stoker Gone Wild Join Date: May 2016 Posts: 225

01-31-2019, 04:41 PM	#7
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: 17935 powerdyne amp meter fluctuating If the voltage is around 57v, that means the OBC is regulating the current to keep it in the "absorption" voltage range.

01-31-2019, 06:51 PM	#9
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: 17935 powerdyne amp meter fluctuating Nothing wrong with that OBC.... (Unless it quits turning off....)

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