What Does 3 Flashes on Redarc Smart Start Battery Isolator Indicate

Updated 12/10/2024 | Published 11/27/2024

Question:

Why would I get a 3 flashes fault indication on the isolator only when plugged into shore power and the house battery in the motorhome is switch to useon ? No other faults any other time. Seems like the charging voltage going to house battery is somehow causing this condition. 2015 Class C

asked by: John C

Expert Reply:

Hey John, so the three flashes you are seeing on the Redarc Isolator part # 331-SBI212D indicates a voltage drop or "excessive current draw fault". Since this is happening with shore power plugged in that would indicate there's something going on with either your transfer switch or your AC to DC converter so you'd want to check voltage on that output when shore power is on to see but most likely it needs to be replaced.

expert reply by: Jameson C

John C.

12/4/2024

Thanks Jameson, troubleshooting my issue is like a moving target. The first issue I experienced was one wire that was hooked up incorrectly that wouldn’t allow the slide to operate,fixed. Still experienced different scenarios with the flashing light. Have been in contact with RedArc and they gave up and are sending me a new replacement unit and I am sending the current one back to RedArc for their analysis. I told them if this new unit doesn’t work correctly, I am removing it and reinstalling the original isolator that was installed from the factory and I guess I will be out the money I paid for the RedArc product. Trying to make an improvement has turned into a fiasco.

Jameson C.

12/4/2024

@JohnC I'm glad they are sending you a new one and I really hope that fixes it for you. Otherwise that's a real bummer it didn't work out.

Johnc

12/10/2024

@JamesonC. I wanted to let you know that I did receive a new unit from RedArc and I installed it yesterday and it works correctly. When plugged into shore power both batteries were receiving a charge, the l e d loight was solid red indicating both batteries were connected together and charging. I let the RedArc customer service representative know about the outcome of the new unit and he said it’s functioning as it should. The RedArc customer service representative also said that the unit I purchased from etrailer was manufactured 3 1/2 years ago. Thanks for your assistance.