Dunkermotoren D240 Repair

Repairing Dunkermotoren D240 if it loses power or becomes noisy

The Dunker D240 motor is a robust AC drive from the older Dunker series for external venetian blinds and shutters. Unlike later models, the D240 does not have freely adjustable limit positions: the lower limit position is fixed, and the upper limit is controlled by the cut-off switch. Therefore, no adjustments are made. If the drive malfunctions, it is almost always due to a failing component within the motor.

Typical error pattern

Over time, a component in the motor loses power. As a result, the motor pulls the blind slowly and weakly, or becomes significantly louder during operation. It's also typical that the blind still goes down, but no longer starts moving upwards on its own. We replace precisely this component, after which the motor runs quietly and with full power in both directions.

• The motor now pulls the curtain only slowly or weakly.
• The blind still goes down, but the motor only starts to go up if you help it manually.
• The motor is humming or has become noticeably louder.
• Under load, the motor stalls or starts only with difficulty.

Repair without an electrician, thanks to the Hirschmann connector. Your Dunkermotor D240 is equipped with a Hirschmann connector (STAK/STAS), a coded and touch-proof plug connection. Simply unplug the motor, send it in, and then plug the repaired motor back in – no wiring or electrician required. The mounting bracket and shaft adapter remain in place. For safety, switch off the corresponding fuse before unplugging.

Our repair service for your D240

For €49 we will replace the defective component of your Dunkermotor D240, with a 24-month warranty on the replaced components.

1. You order the repair via the shopping cart and immediately receive the shipping information by email.
2. You send us your unopened, unrepaired motor. It will be repaired on the day it arrives.
3. You will receive an invoice and repair confirmation via email as soon as the repair has been successfully completed.
4. The insured return shipment will take place on the day payment is received.

Note: We only repair unopened Dunkermotoren without any prior repair attempts. Unfortunately, we cannot accept drives with moisture or impact damage, or those that have already been repaired.

If the motor is damaged in any other way

If the motor is not only damaged at the aforementioned component but also mechanically, a tested, used replacement motor for €69 offers an affordable and sustainable alternative to buying a new one. Your existing mounting bracket and shaft adapter remain intact, eliminating the need for complex modifications.

Technical data

• Drive: Dunkermotor D240, AC drive for blinds and venetian blinds (induction motor)
• Torque: 6 Nm (2 x 3 Nm)
• End positions: lower end position fixed, upper end position via shut-off mushroom
• Operating voltage: 230 V / 50 Hz
• Operating mode: Short-term operation, 4 minutes
• Shaft coupling: 12 mm square
• Connection: Hirschmann connector
• Reference: D240

This service applies to the Dunkermotors D240.

Frequently asked questions about the Dunkermotoren D240

How much does it cost to repair the Dunkermotoren D240?

The repair costs a fixed price of €49. You will receive the invoice after successful repair, return shipping will take place after payment is received, and you will receive a 24-month warranty on the replaced parts.

How does the repair process work?

You order the repair via the shopping cart and receive shipping instructions by email. You send the motor via Hermes; the repair is carried out on the day of receipt, and the drive is returned insured after payment has been received.

Do I need to remove the motor and send it in?

Yes, the repair is done by sending the unit in. You can find the exact model name on the motor's nameplate.

Where can I find the instruction manual for Dunkermotoren D240?

You can find the relevant instruction manual on this page under the "Download" tab. You don't need it for the repair; simply send us the removed device.