Aux 1 Waste Not High, Float High or PV High not turning off

[phxmark]

I have ran into an issue using Aux 1 to trigger a SSR.  The SSR is triggered on at the set points, but will not turn off unless I manually force it off from the control panel.

I initially tried the Float High as that is when I really want the SSR to be triggered.  It does trigger on after the Delay time of being in Float, but will not turn off if the CC goes into resting mode or into a different charge mode, even after the Hold time has expired.  I have both the Delay and Hold times set at 600 seconds.   I can manually force Aux 1 off by going into the Aux 1 setting and setting it to Off.

I have also tried Waste Not High and PV High with the same results.   It will activate Aux 1 at the correct voltage set points, but will not turn Aux 1 off when it reaches the V Low offset or PV Low set voltage.

Also, if Aux 1 is on when PV goes away and the CC goes into resting mode, Aux 1 will remain on.  I can force Aux 1 off through the control panel.

Is there an issue with the firmware on the CC?  I have Aux 1 jumpers set to supply 12v to activate the SSR.

[TomW]

First question will be:

What firmware is on the Classic?

I poked Ryan on this so hopefully he can get you an answer.

Tom

[phxmark]

Classic 200V (rev 4)
Firmware:     
- Classic Rev: 1609
- Network Rev: 1597

[Halfcrazy]

Hm. I will test the newest firmware here but we have seen no issues as of yet. Can you try straight diversion with the voltages set close together and delay set real low just to see if it will work. I guess what I am wondering is if the Delay time is the issue. I will try it here to but if you could try diversion with real low hold and delay that would be great.

Ryan

[phxmark]

I set the delay and hold to 10 seconds and the voltages close together in Diversion mode and it did work.  Aux 1 came on after 10 seconds although when it hit the low voltage, it actually took almost 60 seconds for Aux 1 to turn off.  If I set the delay and hold to 1 second, it took about 1 second for Aux 1 to turn on and 10 seconds for Aux 1 to turn off.

I am going to try Waste Not High again, force a float and see what happens with the lower delay and hold times.

[Halfcrazy]

Hm I wonder if there is a divide by 10 error? I will have Mike check into this.

[Halfcrazy]

Can you go to the MNGP and check the code revisions? I wonder if the MNGP is updated as well?

Ryan

[boB]

I just testing my Classic here in the lab and it appears to work OK so far.
24V battery and connecting/disconnecting the power supply input.
I set it for 10 seconds delay and hold time.  27.0V on and 26.5V off.

It appears to take 10 seconds on and off.  I also set the LED mode to LED 1
so that the left hand red LED on the Classic control board lights up when
Aux 1 output is ON (high) an also watching the AUX1 enunciator on the MNGP.

Could your problem be that either the battery voltage is jumping higher than
the ON set point and resetting the hold timer ?  Or, maybe that the battery voltage
is taking longer to get at least 0.1 volt lower than the set point voltage ?

If the battery voltage is moving around the set point, it may be resetting the timer.
Then again, maybe your voltage set points are good enough that all this doesn't
matter ?

In older MNGP code, there WAS a bug where the delay time (I think it was the
delay time) would show an extra decimal point and an extra digit in the
time setup menu that might be confusing issues.

I will keep checking here.

Thanks !
boB

[boB]

I set the hold time to 600 seconds (10 minutes) and we'll see if AUX 1 goes off in 10 minutes

[phxmark]

Is it possible to get the MNGP version from the Remote App?

Mine does have an extra digit on it that cannot be adjusted and it is set to 3.  The setting looks like 600.0.3.

[boB]

Is it possible to get the MNGP version from the Remote App?

Mine does have an extra digit on it that cannot be adjusted and it is set to 3.  The setting looks like 600.0.3.

phxmark, yes, that is the bug I am talking about...

What that is is that there are a couple extra digits showing that should have been erased from the display.
I think they are the last digits, in this case,  the 0.3   of the  600.0.3  in  your example.  I think that
if you just ignore those for now, you will be OK until your next upgrade/update.

Right now you can't tell the MNGP version but that will also be added in the future.

boB

[phxmark]

Thanks Bob.

I also noticed in the Remote App that if I try to set the PV Low and PV High voltages for Aux 1, they don't jive with what is displayed on the Classic.  If I set the voltages on the Classic, the On Voltage appears in the Off field of the app and the On Field is a number way different from the setting on the Classic.

I have it working now using the Waste Not setting.  Seems to be working.  I will see if it leaves Aux 1 on when it goes to resting mode.  That was just the other issue I was having with Aux 1.  If Aux 1 was on when it went to Resting, Aux 1 would never turn off.  I set the delay to 30 seconds and Hold to 300 seconds.

[boB]

phxmark, did you originally set the delay and hold times using the local app ?

The numbers are actually adjusted in tenths of a second so maybe there is a 10X issue there ?

boB

[phxmark]

Hi Bob.

The Classic turned on Aux 1 when it was in Resting mode.  When the battery voltage came up to the trigger voltage, it turned on Aux 1.

I noticed the same thing happened in Diversion mode and Float mode.  All three are based on battery voltage.  Is there a way to make Aux 1 stay off when using solar and the CC is resting?

I am trying to push excess solar when the batteries are fully charged and the house doesn't need the extra power to a small grid tie inverter.  It works fine during the day, but when the sun goes down and the battery voltage rises back up to the trigger points, Aux 1 turns on.

Thanks for the help.

[dgd]

It works fine during the day, but when the sun goes down and the battery voltage rises back up to the trigger points, Aux 1 turns on.

Why is the battery voltage rising when the classic stops charging? Is there another charging source, wind turbine? etc?
Or perhaps when the sun goes down some loads on battery get disconnected?
What sort of voltage rise are you talking about? how many volts?
dgd