I was asked to look at an Eppendorf 5810r - 5811 (120VAC-15A model) with an Error 22 code.
The unit powers up but goes immediately to a Error 22 - Switch off message.
Could someone provide some direction for me to investigate, diagnose and hopefully repair this?
Thanks,
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Thank you Emily. This unit is obsolete and no longer supported by the manufacturer. I reached out to 2 of the 3 sponsors you suggested but they could not help me... hence the post looking for help on this forum.
I have never seen an error 22 on these units. The Service manual states
Error 22 No 50 Hz signals for fan control.
– During run and stand-by. The fan is
controlled with full power.
– After mains on: The device is not recognized
as a refrigerated device!!
– In case of sporadic occurrence:
Interference in the environment,
caused, for example, by other devices.
Interference frequencies on the power
line.
Solution
– Replace the "Control" PCB.
– Remove interference in the environment.
Test the centrifuge in another
room with a different device circuit
Good morning. First off, have you tried calling Ozark? They are pretty knowledgeable on centrifuges. Secondly, error codes 9 thru 25 are electronics fault. Have you tried switching unit off and back on after a minute or so?
I spoke to someone at Ozark. They only carry the drive motor and gas spring for this model. I've tried switching on/off several different ways, waiting different periods of time. No joy. As I stated in my 2nd post, there is a cooked component on the main frequency converter board (relay). I'm looking for someone who may have experienced this and some advice on what to start tracing as the root cause. Eppendorf will not give me the time of day.
@OldNavy8206
Thanks for the response. I pulled the cover and found that the Schrack RE030024 relay is cooked. There's a BBQ spot right behind it on the back side of the main frequency converter board along at least one trace between pins. Not sure if this is the main problem or just the result of a problem somewhere else in the circuit. Since this is a 3 layer board and I no longer have the electronic service manual (HD crash) I will be relegated to sending it out for repair.
BTW, Thx 4 ur svc. Just retired last yr after almost 37 yrs Army and Guard.
If this unit is below serial number 12,000 it went obsolete over 10 years ago. Eppendorf doesn't carry or sell parts for it. Their Customer Service can only help as far as the Service manual troubleshooting allows. Eppendorf schematics are only block diagrams, no component level troubleshooting.
well I see you've already made your way to labwrench without any luck. error 22 is an electronics error and you've found the culprit, so next up is really just replacing that board, unless you want to accept liability and just replace the component. As far as tracking down the cause, unless it's a known error, I doubt you'll have any luck asking others.
It depends on what the component is and what it did. maybe there was too much imbalance in the unit, maybe it got a static charge or fell or was shaken during use, maybe it was a novice biomed, maybe just a design flaw hence the obsolete status.
either way just pick a repair path or replace the whole unit and move on. Sorry we can't be of more help
So I sent the Main Frequency Converter Board out for repair and it should be coming back to me to install shortly. In the meantime, the person repairing the board recommended that I check the evaporator fan and the blower fan (under the bowl) as one or both were the culprits in taking out the board. I did that and found that the evaporator fan was fine but the blower fan has some issues and should probably be replaced. It's been a long time since I pulled one of these out of a 5810r and I no longer have my files on how to properly do this. There is no way for me to simply unbolt and slip it out to replace. The bowl insulation and tight quarters prevent this. I hoping that I don't have to unbolt the bowl and lift it out of the way to do this. Any suggestions or the ugly truth is appreciated. Many thanks. DISREGARD THIS POST. I WAS ABLE TO SUCESSFULLY PULL THE FAN.
