Solutions for a Frozen Centrifuge with Failed Temperature Control

Release time:

2014-02-24

Overview:

Temperature is an important parameter for refrigerated centrifuges; therefore, it is essential to use a refrigeration system to cool the centrifuged samples and maintain the centrifugation environment within a specific temperature range (e.g., 1–10℃).

There are two main reasons for a centrifuge’s temperature malfunction:

(1) Temperature control panel malfunction;

(2) Sensor failure. Temperature is an important parameter for refrigerated centrifuges, as certain samples—such as cells and proteins—can be damaged when exposed to high temperatures. During high-speed operation, the centrifuge generates heat; therefore, it is essential to use a refrigeration system to cool the centrifuged samples and maintain the centrifugation environment within a specific temperature range (e.g., 1–10°C). After opening the chassis cover and checking the voltage on the temperature control panel, we found that the 12 V and 6 V voltages were normal. We suspected that the temperature-control integrated circuit (ICL7107CPL L9646) might be malfunctioning. Fortunately, we had an unused temperature-control IC (ICL7107CPL 58840) salvaged from an old, decommissioned machine. After replacing the faulty chip, the centrifuge’s malfunction was resolved, and the machine returned to normal operation. If sensor failure causes inaccurate temperature readings and leads to erroneous data that triggers the refrigeration system to switch on and off randomly, it is necessary to replace the sensor located around the outer perimeter of the centrifuge body.

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Reasons Why a Low-Temperature Centrifuge Cannot Cool

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Troubleshooting methods for laboratory centrifuges that fail to rotate or fail to reach the set speed.