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We provide onsite support to our customers - any machine tool, any age

Experience in all CNC manufacturing industry fields, including automotive, aerospace, textiles, food & beverage, petrochemicals, R&D, science & education

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Blog Post

26th November 2018

Siemens 810D CCU start-up procedure

CNC Machine Maintenance Service


This is the Siemens 810D CCU start-up procedure from power on to completed boot.

A healthy CCU is a number 6, green +5v, green PR and flashing amber CB.

The whole process takes around 1 minute.

Visit our YouTube channel to see more CNC maintenance and installation videos!


We keep a large range of CNC machine tool spares and genuine parts in stock for your machines and if we don’t have it, we can find it!

Please contact us using the green button at the top of this page. We can help you book a service, quote you for a repair, or help you purchase the best quality parts for your business.

Siemens 810D CCU Start-Up Procedure

Siemens 810D CCU Start-Up Procedure
Diode failure on CCU box

Previous Post

26th October 2018

"There's a funny smell coming from the electrical cabinet." The 50A spindle drive on the Siemens 810D went bang. All three phases failed the diode test (no surprise there).

This is a fairly common failure on CCU boxes, specifically on the 50A spindle drive.

Poor repair magnified.

Next Post

4th December 2018

To the casual eye, all can often seem ok; however, once you start to interrogate electronic repairs under magnification, the true magnitude of botched jobs can easily be seen.

This is a board that costs in excess of £8000 to replace and has been sent to us for assessment after repair by a third party.


A family business established in 2016, Control CNC Services Ltd. has over 30 years of experience in the CNC machine tool industry. 

Our engineers support all aspects of CNC applications. We provide a total breakdown solutions package; whether the fault is mechanical, electrical, electronic, software, control, or drive, our multi-disciplined engineers will resolve the problem.

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33 Holman Street, Kidderminster, DY11 6QY

Mob - 07469 718828    or    Tel - 01562 702 352

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