Danfoss BD35F problem

[tgalea]

Hi Guys,

I have a problem with my Waeco Danfoss BD35F / VD15 Evaporator.

In short,

I turn on the power to the fridge
Compressor Kicks in
40 Seconds On - then goes off
About 30 minutes later
Compressor kicks in
40 Seconds on - then goes off

And continues like this.

I downloaded some troubleshooting information from Danfoss which I will try. In the meantime however I noticed that my thermostat on the VD-15 Evaporator is jammed. Any idea where I can get a replacement from ?

Any comments help regarding the above would be appreciated.

Thanks
Tyrone

 

[Roberto]

Hi Guys,

I have a problem with my Waeco Danfoss BD35F / VD15 Evaporator.

In short,

I turn on the power to the fridge
Compressor Kicks in
40 Seconds On - then goes off
About 30 minutes later
Compressor kicks in
40 Seconds on - then goes off

Maybe an undersized current protection thermal device ? When the compressor starts it can easily draw 2-3-4 times the average current it uses 10 minutes later, if the overcurrent protection is set too low that might explain the behaviour

 

[Roberto]

just went through a troubleshooting guide, it might also be the low voltage protection of the controller: in case the voltage drop *at the controller* goes beyond a certain level, the unit shuts itself off.
If you can connect a led between the + terminal of the controller and the "D" stud, one flash every 4 seconds indicate a low voltage error.

A check of battery conditions, wire size, connections etc might be useful

 

[JonJon]

Have the same problem. I suspect a bad high resistance connection in the wiring. If I bypass the existing wiring and go straight to the battery - no problem. Note the inrush current for the compressor is quite high which with a bad (corroded) connection or wiring thats too thin it drags the compressor supply voltage down beyond the cut out voltage.

 

[jordanbasset]

Had similar problem, could not understand it as power was getting to the compressor. Turned out there was a poor connection in the switch box, cleaned it up and worked fine. Voltmeter did not show this, saved me a lot of expense as I was considering buying a new compressor.
Yours may be different but would check out all connections.

 

[charles_reed]

Though info is sketchy (on shorepower, battery size/age) I'd guess a faulty cell in the supply battery which trips the voltage-circuit-breaker.
Had a similar problem with a corroded blade-fuse holder, (intermittent function).

 

[Grumpybear]

I had this problem. turned out to be the uniquely unavailable four pin plug onto the compressor motor itself. I eventually solved the problem by replacing the control unit, with its supply cable potted into it, with a spare provided by a friend who runs a refrigeration business.

I also understand that over time the cable from the boat's 12v panel to the fridge controller can work harden, increasing resistance. replacing this cable with a thicker one can help.

 

[Billjratt]

+1 for the low voltage answers.
Check it at the danfoss push-on connectors.

 

[tgalea]

Mechanical Thermostat

Hi,

After some troubleshooting I found the thermostat was the problem.

I replaced this but am not 100% sure how the sensing tube should be set up inside the Waeco VD-15 evaporator.

Any documentation or guidance appreciated.

Thanks
Tyrone