Discussion Category:  Centrifuge

No error...Refrigeration doesn't keep temperature during a run

No error...Refrigeration doesn't keep temperature during a run

Fast cool function cools the machine down to set temperature but never stops. When I try a run, the temperature slowly increases away from the set point. Any ideas? 

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Tech
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WarwickJon

When you say it cools but never stops, can you expand on that a bit please?

Does the refrigeration unit keep pulling the temperature down past the set point?

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Tech

Quote WarwickJon

When you say it cools but never stops, can you expand on that a bit please?

Does the refrigeration unit keep pulling the temperature down past the set point?

Thanks for the reply. It cools on fast cool but doesn't stop, I have to manually stop it, even though it reaches the set temp. Under 12,000 RPM it keeps the temperature nicely, but at 13,000 RPM it slowly increases to around 7-8C when set to 4C. At 14,000 RPM it slowly increases to 9-10C when set to 4C. I had it flash once error 20 but it dissapeared quickly when I closed the lid. Any ideas?

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WarwickJon

Based on that, you've got to consider your refrigeration side of things is defective and cant handle the extra heat generated at higher speeds.

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WarwickJon

Also, check that the unit isn't pushed up against other equipment, thus blocking the airflow out of the vents.  We've had this before here where people shove things up against the centrifuges.

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Ross Hansohn

It could also be that the condensing coil is clogged with dust. Or perhaps it is low on refrigerant.

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WarwickJon

Quote Ross Hansohn

It could also be that the condensing coil is clogged with dust. Or perhaps it is low on refrigerant.

Deffinately also a posibility and worth checking.

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