Reverse Polarity or not?.

[iain26]

Have the Moho parked on the drive and keep checking the batteries and need to plug in to the house mains every few days. Has a Sargent EC500 system.

One day I plug it in, charge the batteries and everything is hunky dory.

Next day I plug it in and it shows reverse polarity and the battery monitor BM01, throws a fit showing up to 8a discharge. I have to turn off the mains supply, wait a few minutes and then turn it back on and we get back to things working normally.

Any ideas what is causing the reverse polarity?

Confused!

 

[Odd-no-more]

It won't be reversed polarity, it is more likely a software issue. Polarity cannot change if you are using the same connection.

 

[berni109]

Sounds like a question for Sargent technical support.

 

[pappajohn]

The BM01 is connected to the 12v services and is isolated from 240v.
The charger will work no matter which polarity the mains is.... The charger cannot reverse the 12v output.
As already said, if you use the same hookup lead the 240v mains cannot reverse polarity.

 

[autorouter]

Did you plug it into exactly the same house socket? With the same hookup cable and adapter?

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[iain26]

Did you plug it into exactly the same house socket? With the same hookup cable and adapter?

Yep, same socket, same lead.

 

[iain26]

Sounds like a question for Sargent technical support.

I’ll try and give them a call tomorrow and see what they have to say.

 

[autorouter]

Might be worth checking that connections have not worked loose on the hookup cable connectors or the adapters. or mouse nibbles somewhere on the supply wires.

 

[EuroTrotters]

Sounds like a question for Sargent technical support.

If you can get a reply

 

[iain26]

Spoke to Sargent this morning. They say it’s either the mains socket, the ehu cable or the psu.
So I have to change the socket the ehu is plugged into, then try a different ehu cable first.
I’ll do that first and see if anything comes up.

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[pappajohn]

Spoke to Sargent this morning. They say it’s either the mains socket, the ehu cable or the psu.
So I have to change the socket the ehu is plugged into, then try a different ehu cable first.
I’ll do that first and see if anything comes up.

Sargent are talking Bollox.... None of the above can change polarity once, never mind repeatedly.
One thing which can affect your reverse polarity monitor is a bad/non-existent earth.
Happens a lot using generators.

 

[Odd-no-more]

Do you have a multimeter? If so you can do a polarity check at a socket

 

[iain26]

Sargent are talking Bollox.... None of the above can change polarity once, never mind repeatedly.
One thing which can affect your reverse polarity monitor is a bad/non-existent earth.
Happens a lot using generators.

Hmm, I agree, but I do the checks they ask for then I can go to them and say "done that... whats next".

 

[Nasher]

I had a similar situation (different electrics) and when I checked the mains socket, there was a faulty earth

I used one of these to check it

Socket Tester

This socket tester is a handy accessory in any electrician's tool kit. Simply plug it into a wall or floor socket and it tells you if the fitting is faulty or not. The tool is also a great gadget to keep at home or in your workshop to determine if a problem lies with your electrical device or...

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