Cruisers Forum

Join CruisersForum Today

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 27-10-2016, 21:28   #1
Marine Service Provider

Join Date: Jan 2013
Location: San Francisco, CA
Boat: Beneteau Oceanis 423
Posts: 244
Fans not running on frigoboat/danf


I have a Danfoss bd35 system and I'm having some overheating on one of the compressors overheating. I have disconnected every wire and reconnected them cleaning up some corrosion and I'm getting 12.4v at minimum (I'm cruising on the hook in Fiji so not plugged into shore). I have disconnected the fans and they work with a battery, but they don't run when they're hooked onto the refrigeration system. One of the fans (a big one) is running, but not the small ones. I'm really stuck here, I'm not sure what else to do to troubleshoot.

The fridge is cool and works fine, but I'm concerned about the overheating on the compressor and it's VERY HOT, as in it'll burn you if you touch it... I suspect I have more problems down the line but I'd like to figure out the fans first. Any tips?

Beneteau Oceanis 423 for sale on
YoloSF is offline   Reply With Quote
Old 28-10-2016, 13:41   #2
Registered User

Join Date: Jan 2008
Location: SF Bay Area (Boat in La Paz)
Boat: Valiant V40
Posts: 715
Re: Fans not running on frigoboat/danf

1. Pull the fans and make sure they are working when powered from a known good 12v source.

2. If bad, replace

3. If good, check the fan terminals on the controller for 12v to the fan

4. If no 12v for fan, likely need to replace the controller, or power the fan from the compressor 12v.

Curious, where are the fans located? In our system we have 1 6-inch fan cooling the compressor, and 1 2-inch fan controlling spillover between freezer and refer. And yes, even with the fan running, the compressor does get warm, but the controller board does stay cool.
jamhass is offline   Reply With Quote
Old 28-10-2016, 17:10   #3
Marine Service Provider

Join Date: Aug 2004
Location: Ft. Lauderdale
Posts: 1,422
Re: Fans not running on frigoboat/danf

Electric compressors can be damaged if over heated so Danfoss BD compressor electronic control modules are have several safety circuits to protect Compressor.
The BD35 module provides power to the cooling fan from wire terminals Small + and F terminal. This circuit if exposed to fan current exceeding 500 Milliamps (1/2 amp) will prevent compressor from running indicating poor system cooling.These muffin fans each have several transistors inside and bearings can run dry of lubricant at near 4000 operating hours. Air-cooled Systems powered by Fan cooled Danfoss compressors can experience a 30 year trouble free like with the one exception fan failures.

If you must run two fans suggest you use a relay.
Richard Kollmann is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
380: Lagoon 380 Owners and Fans Erikte Lagoon Catamarans 73 01-04-2019 12:05
420: Lagoon 420 Owners & Fans ess105 Lagoon Catamarans 1178 08-02-2018 23:25
Older Frigoboat Not Cooling - Decisions 4arch Plumbing Systems and Fixtures 7 14-04-2015 08:40
Hella Fans Caframo Fans Brushless Fans cat man do Construction, Maintenance & Refit 37 05-09-2012 00:45
12v outlets and fans Jack Long Electrical: Batteries, Generators & Solar 12 18-09-2008 18:32

Advertise Here

All times are GMT -7. The time now is 03:04.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.