R-27 location and resetting ACR’s

T

TugScout

Well-known member
Joined
Aug 12, 2018
Messages
153
Fluid Motion Model
C-24 C
Non-Fluid Motion Model
Nordic Tug NT32-220
Vessel Name
Polaris
Good morning from dead house battery land. I spent the night on hook and normally get up a couple times a night to run the engine and charge the batteries. Last night I slept right through it. Now the engine bank shows charging via the Morningstar monitor but the house bank shows 9.7 volts. I’m guessing the ACR is tripped but I’ve never dealt with it so I don’t know where it is or how to reset it. Any help is greatly appreciated. Oh, the boat is a 2012 Classic. Thanks, Mark


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these could both be ways not others would suggest but one way is to charge the battery with a separate charger which you probably do not have handy. The other way I have done it is to hook a battery cable clamp on each side of the ACR so that it forces a charge. Once it charges up a bit you can take it off.
If you are stuck without either of these but have tools you would take the cables off one side and secure it together on the on the other side until you charge it up a bit. switch it back as it was. Then it will operate properly.
 
Thanks Matty. Great idea. I can basically just bypass the ACR by combining the two leads on one post. Once the house battery is charged I can return it to the original configuration.


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Worked perfect. Engine running and battery charging as I type. Thanks for the help. Mark.


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Glad i could help...sounds like you needed the quick and easy method.
 
just out of interest how are you killing the batteries every few hours during the night? it seems like your power usage is out of sync to your battery capacity?
 
TugScout":wtbsvvks said:
Good morning from dead house battery land. I spent the night on hook and normally get up a couple times a night to run the engine and charge the batteries. Last night I slept right through it. Now the engine bank shows charging via the Morningstar monitor but the house bank shows 9.7 volts. I’m guessing the ACR is tripped but I’ve never dealt with it so I don’t know where it is or how to reset it. Any help is greatly appreciated. Oh, the boat is a 2012 Classic. Thanks, Mark


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When the batteries voltage gets to low the ACR will not close to recharge the batteries with the engine running and alternator charging. You must "excite" the house batteries with a Voltage of 12+ voltage. Jumping with the cables did that. An easier way would be to turn the crossover switch on "parallel switch " this excites the house batteries and now the ACR will close and the engine alternator will now charge the dead house batteries. As Gavin has stated the batteries should maintain over night. Having the batteries discharge 100% (below 11.5 Volts) will cause sulfation reducing the batteries running times between charges and dramatically shorter battery life.
 
Brian's method is much easier than using jumper cables. My intitial concern here and voiced earlier is the fact that your batteries are being depleted so quickly. Either the batteries are in failure or you are using way too much power at night. After a night on the hook I am usually at 12.4 Volts +/- During that time period refrigerator is on, c-pap is going and all phones and iPads are being charged.
 
Hi Gang,

What an incredible resource the Tugnuts is for any owner. Thanks for all the help and for your concern about the condition of my batteries and their depletion rate. The batteries are well loved and well cared for and have made it to their seventh year of life as they are the original set purchased with the boat. My power usage at anchor is very typical but these good soldiers are just tired and clearly past their prime. I'll be replacing them this winter with four new NorthStar NSB-AGM31M.

Thanks again everyone, I really appreciate the support.

Mark
 
Yes, my (limited) experience has been that the fridge runs fine overnight without running the batteries down. During the day, the solar panel helps. I have left the boat at the dock for several days w/o shore power connected and the solar panel keeps the fridge running even with a very warm cabin in the closed up boat. At anchor we might run a couple extra items at night, anchor light, a couple interior lights, and maybe a phone charger or the radio. (I've never left the GPS on with the anchor alarm set.)

I've got the same vintage R-27, but the previous owner put in new batteries in 2015 before I bought it in 2016.
Still going fine.... I hope.
 
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