Dunkermotoren Blind Drives

Dunkermotor D249, D259, D349 and D359: Setting the end position

The Dunker D249, D259, D349, and D359 series of blind and venetian blind drives are used in many external blinds and venetian blinds, and often also as drives in Warema systems. D259 and D359 are the successors to the D249 and D349 and function identically. If your venetian blind no longer stops at the correct position or if you have replaced the motor, the end positions must be readjusted. This can be done directly on the motor without any additional equipment.

This is how the end position setting works

The end positions are set directly on the motor using two self-locking pushbuttons, one for the upper and one for the lower end position. The drives are factory preset to the lower end position. No tools or accessories are required.

Setting the end position step by step

1. Press the setting button for the direction whose end position you want to define, and move the blind in that direction.
2. After traveling approximately half a meter, the button will automatically remain in the pressed position as long as you continue driving in the same direction. You can now release the button.
3. Drive to the desired end position.
4. Change the direction of travel. At that moment, the button will audibly spring back with a distinct click, and the end position will be saved.
5. Repeat the process for the second end position using the other button.

If your external venetian blind is connected to an automatic blind control system without a direct-acting manual switch, you will need a direct-acting switch for adjustment. The exact button layout for your model can be found in the original adjustment instructions, which we have linked in the download section.

The blind has overshot its lower limit position and is stuck.

If the blind has moved beyond the lower limit position to the upper stop while moving downwards, the blind is blocked by the activated safety stop button. Release the pressure on the safety stop button and press the upward button until the lower limit position is reached again. You can then readjust the blind.

When it's not a settings problem, but the limit switch is defective

If the end position cannot be saved despite correct procedure, the typical click is absent, or the drive stops permanently before reaching the end position or overshoots it, then the cause is usually not operator error, but a defective limit switch. This is by far the most common defect in this series. Which switch is affected depends on the direction of travel: For counter-clockwise ( CCW ) drives, it is generally the lower limit switch, and for clockwise ( CW ) drives, the upper one.

The good news: the motor, windings, and gearbox of these drives are very robust and can even withstand prolonged blockages. In almost all cases, only the limit switch is affected, and that is precisely what can be repaired.

Faulty limit switch? We'll repair it.
We repair the limit switch of your Dunkermotor D249, D259, D349 or D359 for a fixed price of €49, repair on the day of receipt, 24 month warranty, 5.0 on 110 Google reviews.
If the motor is damaged in any other way, you will receive a tested replacement motor for €69.
The mounting bracket and shaft adapter remain intact. For Dunkermotoren repair.

Operating instructions for the Dunkermotor D249 and D259

Anyone looking for operating instructions for the Dunkermotor D249 or D259 generally needs just two things: the connection and the limit switch settings. Both are described step-by-step at the top of this page, including the position of the adjustment screws and what to do if the blind has exceeded the lower limit position. The complete operating instructions are provided by the manufacturer, Dunkermotoren, and are not available for download here. If you are unsure about anything, please give us a call; we work with these motors every day.

Identify left- or right-hand rotation on the type plate

The motor's nameplate indicates the direction of rotation: counterclockwise ( CCW ) or clockwise CW. This makes no difference for limit switch adjustment or repairs; the procedure and price are identical. This information only becomes important when replacing the motor, as it must match the rotation direction of your system. See the repair pages: D249 counterclockwise and D249 clockwise.

Technical data of the series

All models: 26 rpm, 230 V / 50 Hz, IP54 protection rating, protection class I, short-term operation S2 4 minutes, limit switch range 68 revolutions, shaft coupling 12 mm square.