Alde Heating

TimandLaurie

Alde main circulation pump circuit board on back of motor burnt up M/N D5vario 38/000 S/N50371977. There is 12v power going to this motor all the time when battery switch is on. The Alde 3020 controller is not controlling power to this pump. That's why it burnt up. There is power to the pump when the wire from the 3020 is disconnected at the board at the boiler. My thought is; there is a relay on the board that is bad stuck closed to power the pump. Anybody had this problem? Or other ideas. Sincerely Tim Tab 400 BB 2022 Alde M/N 30209300 S/N 371145 - 

MuttonChops

Disclaimer: No direct knowledge.

The older (early) 3010 Control Boards did have a relay to control the circulation pump [K2 to be specific].  There aren't as many relays on the 3020 Control Boards so pump control maybe solid state.

Your issue will most likely require a new Control Board and suggest you talk directly with Alde USA Support.  It is easy to replace the board - - - just pricey.

TimandLaurie

Thanks for your information.  

TimandLaurie

Removed the old board part #CE679216 High Efficiency

Would Truma in Indiana sell me this board? Tim

mlk51

The pumps in my 2017 320S have manual speed controls (little dials on the face). While the control panel implies it controls the pump speed, it does not

Sharon_is_SAM

@TimandLaurie - give Truma a call.  They may sell you the part.

(855) 558-7862
service@trumacorp.com

TimandLaurie

Amendment to my first post. Removed the pump and bench tested with 12v battery; pump does run. The control board will not run the pump even though I get a 12v reading with my meter. I think the voltage reading I am getting is back feed voltage on the board. Tech at Alde says bad board. Alde will not sell me the board, Nucamp will not sell me the board. Local Nucamp dealer will sell me the board for $300. Or I can buy it from a company in the UK for $347. I went with the dealer. Sincerely Tim

TimandLaurie

Installed new board pump works fine no voltage when pump is off cont operation and works fine when on. Might look into repairing old board as spare. There are two relays K1 and K2 one of which might bad. Sincerely Tim