ProNautic Charger Lockup

Coz

Active Member
Oct 9, 2018
443
Boat Info
2008 Sundancer 310
Engines
Merc Mag 350 DTS w/Bravo III
I’ve had 2 brand new 1250P chargers have this problem. Returned the first one.
It works fine for weeks. Then it locks up. The fan goes to high like its charging on full output but the screen displays 0V and 0A. Boat is on a trailer in my pole barn with no load on battery. I have to reset AC power to get it to work.
 
Their customer support is usually really good. Reach out to them.
 
Their customer support is usually really good. Reach out to them.
Agree. Weird things happen, but that's odd to have the identical thing happen twice. Maybe it has something to do with the installation. The original charger was probably a 30a unit. Did you make any of the necessary adjustments to account for the increased power? I would have thought that a fuse/breaker would just blow if there was that kind of problem - but electrical can sometimes be funny. Give them a call and be sure to discuss the original unit.
 
They said it could happen if the ac power flickered, off then back on at just the right moment. Sounded kinda hokey to me. I do know if you shut ac power off it does take a few seconds for the display to go blank.

I’m gonna try to make it happen.
 
Same thing happened to my 1250 last weekend. Played around with settings to no avail. Had to turn off the shore power and turn back on to get it to start charging. I also believe its caused by the shore power fluctuations. FYI I'm on 240 volts in Aust. I also upgraded my breakers and wiring when up upgraded from the old 40 amp charger.
 
Promariner said they had a similar problem on earlier models but corrected it around 2014. If anyone else has had this happen please let me know. I Wouk like to share that info with promariner
 
I have emailed Promariner on this issue as my port bank is now dead. To their credit they have promptly responded with a charger testing procedure which I have yet to undertake.
 

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