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Next Step 12P Slow Charge

PostPosted: Tue Aug 25, 2015 6:31 am
by Jwood

I've searched this forum and was unable to find my particular issue, so here goes:

I have a NEXT-12P with bank of 4, 6 volt golf cart batteries. When my alternator is charging it is slow and with very low amps (1.5 to 8amps). I have no error codes flashing with red light and green light either flashes 1 second on, 1 second off or on steady. Following are table 9 test results:

1. House volts 12.4, 12.35, 13.25
2. Parallel 0, 0,0
3. On/Off 0, 12.35, 13.75
4. Ground 0, 0, 0
5. B+ 12.65, 12.30, 13.35
6. Field 0.02, 12.15, 13.30
7. Alt Gnd 0, 0, -0.03
8. Lock not used
9. Bat Vollts 12.39, 12.5, 13.84
10. T- 0,
11. T+ 0, 3.04, 3.04
12. ABS not used
13. Lamp 0, 0.001, 0

From table 10 I would think there is a problem in that my running field voltage is higher than bat volts compared to some of the results I've seen in other's test results, but not sure.

My shore power house battery charging system charges properly and at it's rated 20amps so monitoring appears to be accurate for current.

Any help would be greatly appreciated.

Thanks in advance

Re: Next Step 12P Slow Charge

PostPosted: Tue Aug 25, 2015 2:21 pm
by Coulomb
The high field voltage you spotted points to the alternator. With that high a voltage the alternator should be putting out maximum Amps.

It's possible the brushes are worn out so that field current is low despite the high voltage.

Another possibility is blown diodes in the alternator, or defective stator windings.

Re: Next Step 12P Slow Charge

PostPosted: Tue Aug 25, 2015 2:39 pm
by Jwood
Thanks very much for quick reply.

I will have the alternator tested and repaired or replaced.


Re: Next Step 12P Slow Charge

PostPosted: Wed Aug 31, 2016 6:02 am
by Sailon
We replaced an old style NS regulator that had a wire attached to the ABS terminal. The new style NS2 regulator has no ABS terminal on TB1 or TB2. Do we just not use the wire? Is the feature built in to the new regulator?

Re: Next Step 12P Slow Charge

PostPosted: Thu Sep 01, 2016 1:11 pm
by Coulomb
You won't use that wire.