APU Tri-pac not charging batteries

Interesting. I've done two of them and haven't seen that happen. I guess it's still running ok with the a/c compressor engaged and condenser fan running? Seems like that would hit the engine just as hard as a high inverter load, pointing to a voltage drop across a bad main power terminal or connection. On all three of my Tri Pacs the install job was sub-par cable terminal crimps to begin with, and only got worse with age. My first guess would be an issue with batteries/cable ends. If yours still has the 50A maxi fuse in the engine compartment (alternator B+ to microprocessor board), that's another potential sore spot. It's pricey (what isn't?), but TK sells a fusible link kit to replace that.

 

Go to an alternator shop or shop online. I paid 150.00 installed in less than 1/2 hr

 

Had this happen to me once in a Columbia the tripac alternator had gone out and the blower motor was running off the batteries and draining them

 

I'm getting alt code after I replaced a broken belt, can the broken belt damaged the alternator? The APU runs from 4 to 5 minutes and then shuts down with the code "alt". Please help.

 

Check the voltage and make sure none of the wires are not broken.

 

Check the alternator and make sure is not frozen/stuck why the belt broke in the first place.

 

Thanks I replaced it and is up and running

 

Glad you got it fix. Most likely alternator got stuck and belt broke so ehen you replaced the belt it still won’t turn and throwing the alt error code.

 

I have a 2011 TRI PAC and just got a new alternator out in it and just use it for the first time after getting the alternator replaced. So I ran it for about an hour and the it turned off and said alt on the panel. So I noticed when the battery falls below 12.8v it turns off! So can anyone tell me what the problem could be.

 

Sounds like you either got a bad alternator, or it is not connected, and when you are running the TriPac it is running off of your batteries.