Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-21-2019, 11:15 AM   #1
Contributing Member
 
Pahaska's Avatar
 
2018 Interstate Grand Tour Ext
Austin (Hays County) , Texas
Join Date: Jun 2002
Posts: 7,065
Images: 4
Firefly oddities

When I happened to select the home screen of the main Firefly display today, my chassis battery was reading zero. I had previously disconnected and reconnected the ground by the accelerator pedal while installing the Blue Sea BIM.

The voltage at the 2 amp fuse on the coach side of the BIM read correctly. I pulled the cover of the main Firefly board and the connector for the coach battery and generator hour meter was in place and secure. I pulled that connector and the correct voltage for the chassis battery was there. I plugged the cable back in and the main Firefly display showed the correct voltage. For whatever reason, the Firefly did not detect the chassis battery coming back on line, but hot plugging it made it work properly.

The coach battery voltage on my main Filefly display reads about 0.4 volts low, compared to the chassis side and the Magnum display just above. My meter confirms that the Magnum display is correct. The BIM is actively connecting the two batteries and they should read the same. I think I have a defective Firefly board. The low reading can be a bit scary when not connected to outside power.
__________________
John W. Irwin
2018 Interstate GT, "Sabre-Dog V"
WBCCI #9632
Pahaska is offline   Reply With Quote
Old 06-22-2019, 12:12 PM   #2
Wannabe RV'er in training
 
Alex AVI's Avatar
 
2018 Interstate Lounge Ext
High Desert , Las Vegas , Nevada
Join Date: Feb 2018
Posts: 2,460
Quote:
Originally Posted by Pahaska View Post
I had previously disconnected and reconnected the ground by the accelerator pedal while installing the Blue Sea BIM.


The coach battery voltage on my main Filefly display reads about 0.4 volts low, compared to the chassis side and the Magnum display just above. My meter confirms that the Magnum display is correct. The BIM is actively connecting the two batteries and they should read the same. I think I have a defective Firefly board.
JOHN - did you disconnect house Gnd too?

I have had my coach batteries read 0.4 low compared to chassis, but that's when the banks are disconnected and depends on SOC of each bank and where in the charge cycle they were at the time, epsecially since I leave fridge on all the time and roof vent fan running when hot weather. But I do not remember if there was that difference compared to Magnum display. But also, they should only be the same if the BIM has them connected. So this voltage differential is happening while both banks are connected or disconnected? May need to call Firefly and ask if you have to calibrate. May want to check what your SeeLevel II display reads for voltage also. It is buried behind the panel or inside one of your overheads.
Alex AVI is offline   Reply With Quote
Old 06-22-2019, 02:54 PM   #3
Contributing Member
 
Pahaska's Avatar
 
2018 Interstate Grand Tour Ext
Austin (Hays County) , Texas
Join Date: Jun 2002
Posts: 7,065
Images: 4
Both the chassis and the coach grounds were disconnected while I replaced the BIM. I had noticed the difference before I replaced the BIM.

They should read the same when the BIM has the batteries connected. I might check with Firefly to see if they can be calibrated. I see no indication on the Firefly board.
__________________
John W. Irwin
2018 Interstate GT, "Sabre-Dog V"
WBCCI #9632
Pahaska is offline   Reply With Quote
Old 06-22-2019, 03:38 PM   #4
Wannabe RV'er in training
 
Alex AVI's Avatar
 
2018 Interstate Lounge Ext
High Desert , Las Vegas , Nevada
Join Date: Feb 2018
Posts: 2,460
Quote:
Originally Posted by Pahaska View Post
They should read the same when the BIM has the batteries connected. I might check with Firefly to see if they can be calibrated. I see no indication on the Firefly board.
JOHN - Agree. Should match. Yeah, see no obvious calibration on Firefly board. But my understanding (and personal discoveries of sensor is the Firefly is just a graphics layer (GUI) on top of existing sensor
Alex AVI is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Firefly :: 2016 Airstream International Serenity GandTSayor Airstream Registry Discussions 1 06-12-2016 07:33 PM
Firefly :: 1978 Airstream Excella 500 heather.rauh Airstream Registry Discussions 0 06-10-2013 06:13 PM
'74 Argosy oddities bkahler Argosy Motorhomes 6 10-01-2012 06:01 PM
"Firefly" 1960 Tradewind :: 1960 Airstream Tradewind 2vets Airstream Registry Discussions 0 08-19-2011 08:30 AM
Airstream oddities j54mark Our Community 4 08-12-2004 10:51 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 07:25 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.