eppendorf 5810R board diagnostics

If its been left switched on for a long time it might not have appreciated being switched off while it was being moved, so it might have blown something on the voltage regulator (where the power cord goes into the back of the unit). I hope you manage to sort it out - my 9 year old 5810R died last month due to the rotor sensor failing. Eppendorf claimed they only keep spare parts on equipment for 7 years and since mine was 9 years old, no spare parts were available.

Probable failures for Error 6- the Frequency Converter PCB, or motor or brake.  
Eppendorf may not support this centrifuge but you do have alternatives service companies that do.  You can visit www.Saharasimba.com and talk with techs regarding parts or repairs.

Were you able to fix the error 6 on your machine?

Were you able to fix the error 6 on your machine?

Post by Sime basically explains all the possibilities for failure when you have an Error 6. As far as board repairs , you have alternative service providers. Sahara Simba Electronics offers board repairs and technical support on all repaired equipment.

In my experience, it's mostly poor mains connections. Of the four 5810's that I have repaired with an Error 6, three of them were as simple as cleaning and reseating the spade connectors on the main power input. (I probably squished the female spade connector a little tighter with pliers, too.) Of those three, on one of them I had to clean/reseat the other end of of the main power wires where it connected to the main board. On another one of those, I replaced capacitor C11 (100µF/35V) on the main board as well, so I'm not sure which fix was the real issue. And then on the fourth one with an Error 6, I had to resolder a broken jumper bar on the big braking resistors. It looks almost like it's designed to break away if it over-amps (this may have been on a 5424R centrifuge, though). Good luck.

Another source of Error 6 is a bad thermister (inlet current limiter) on the FCB. It's a matte-black disk, about 2 cm diameter, located toward the top of the board. It almost looks like a disk capacitor and is labelled "SG160". It's supposed to measure 2.5 Ohms resistance. Mine measured 1.6 kOhms and had evidence of overheating. When I wiggled it a little one of the leads broke off from the disk. Replacing it fixed the problem. It's shown on page 85 of the service manual, right at the end of the "5-4" part callout line on Figure 3 (Spare parts list).

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