Heat bed is not heating

Hallo

The heatdbed is not heating. Extruder works fine.
When I change heatbed with extruder on the controller unit - heatbed shows immediately room temperatures. Extruder shows “0”.

Can you help me?
Thanks
Lomax75

Can you measure heated bed resistance at the connector, should be about 7-8 ohm?
Also check on the PCB itself, to rule out wiring problems.
If all OK, then we suspect a problem with the controller board.

Hallo Velleman support team,

First, thanks for the fast and competent support.

I have measured and both connectors shows either 6,9 or 7,0 Ohm.
I have once again checked the wiring. The wiring ist correct.

Is there a way to send in the Controller Board for correction or what do you suggest.

Thanks in advance
Lomax75

Then we have to suspect there is a problem with the board.
You can return it to your Velleman distributor or direct to:

Velleman Projects Tech. Dept.
Legen Heirweg 33
9890 Gavere
Belgium

US residents: please call (817) 284 77 85

Make sure to include a fault description, as the people that moderate the forum are not the people that handle repairs.

I have the same problem.
I made about 6 to8 prints without any problems and suddenly
i received following faults.
No start signal detected -forcing start.
communication time out
reset send buffer block.

no more tempature on screen of the heated bed and no heating of the extruder and bed.

Dear Telemaster.

Check the NTC sensor of heater (hot-end) and also the NTC sensor on heatbed.
Check also the wires of these sensors. Maybe a bad contact, or shortcut.

Best regards,
Velleman Support