Plasmatronics shunt not registering load

[Jon and Kay]

For the past week the PL40 has not been registering Load
All connections to shunt and PL40 appear good, charge is registering correctly. So....can I reset a PL40?

[homeless]

With mine if I turn off the Batteries the PL40 resets. Eg the days data is lost / or rolled over and it starts from 0 on all readings.

I find the only thing in the settings that is lost is the time option so you should check that as it will reset to 0:00 at the time re turn the power back on. I like mine to reset at sun set or the full hour after. This way I know what has gone in during the day and what was used and also the SOC when the charging is finished for the day.

Once you think your batteries are as full as you can get them then check your SOC as I find that is also out of whack.

Make sure if you use thin cables from you Pl40 to the shunt that they have not broken inside the insulation and you just cant see the break.

The experts may have a better idea but this is a start.

Hope all is going well for you where ever you are in our great country.

Regards
Brian

[Jon and Kay]

Thanks Brian. At Police Paddocks waiting for the rain to stop in NSW.
I have a feeling it will be in the box that connects to the shunt and sends the signal to the PL40. Turning the power off to restart it after 5 years surely can't be a bad idea.

[homeless]

Might pay to pull all cables and then re plug.

Treat it like the old computers, if in doubt pull the card/cable and then replace, often it is just dust particles opening connectors.

An added bonus is you will not charge yourself for a new card etc after your unplug and plug in again like a lot of computer service agents do .

Regards
Brian

[T1 Terry]

My PL20 chucked a wobbly a few days back, not sure if water got to it or a nearby lightening strike. I had to disconnect the battery positive feed for a minute, then reconnect, then reset all the progran settings, it was totally mixed up. The system voltage was 32v, battery capacity 980 Ah, program 3 not 4, hysterisis 0.9v, float 31.5v and heaps of other weird readings, the shunt reading were completely wrong, i had charge and load both through the shunt at the same time . Reset every thing and it's going fine again.

[Jon and Kay]

OK.

PL40 said batteries at 12.3....obviously wrong, multimter said 13.1 looked right, waited til sunset, disconnected big red wire (bat+ve) and reconnected. Multimeter read 12.6v .
Load read 20.6 Amps....turn off the unnecessary appliances. So....provided that Tomorrow when the sun shines, it measure current in AND current out, all will be well, and Brian's suggestion to reboot will have earnt him a beer (what a shame our paths never cross )

[Craig]

Isn't the PL40 controlled from the negative side of the battery? So wouldn't you have to disconnect the negative lead?

[TigerMK1]

I did have a problem with the 2 twisted leads from the shunt being inserted into the controller. It had such small screw terminals that the vibration/movement of the vehicle had fractured the conductors into the PL sensor. Maybe worth checking.

[T1 Terry]

Isn't the PL40 controlled from the negative side of the battery? So wouldn't you have to disconnect the negative lead?

It's just a shut down reboot thing, removing the positive lead is just like turning it off, there is only one positive lead but up to 4 negative leads.