CTEK Smartpass 120S problem

[Jean Mercier]

I have the double battery in my car and I have probably a CTEK problem.

My car is parked since yesterday without driving. My fridge was running, and this morning I saw my main battery was at 12V and my auxiliary at 12.80V.

The trickle charging of the main battery through the auxiliary battery doesn't seem to work.

I checked the warning lights, and according to the manual it means the auxiliary battery is too hot. But, the car didn't drive, the ambient temperature is 18°, and the battery doesn't feel hot.

Anyone any idea?
(CTEK 250 installed, but not solar panels connected)

 

[OkGo]

On my d250 and d250s there is a temp sensor that needs to be stuck onto the battery. You seem to have a d250se (?) does this not have the same wired temp sensor?

https://www.google.com/url?sa=t&sou...kQFnoECCMQAQ&usg=AOvVaw0sWOyx9cBLxrB3RzuYWWsp the manual seems to think there is a sensor, what have you stuck it onto. It might be in contact with something else, that is getting warm in the sun (? Guess ?)

 

[TheDocAUS]

As battery ages they can deteriorate at different rates, but if the fridge is on the main battery it maybe drawing power faster than the trickle charge from the aux to the max, via the CTEK120S.

Look at the 24 hour graphs from each battery to see if there is a variance in power draws.