Revco -86 ULT2186-9-A35 randomly tripping circuit breaker and shutting down

Has any other piece of equipment been put on the same circuit, and it's only happening since then? There may be too much current draw if so. Or possibly the compressor may be seizing. I'm not a refrigeration tech, but those are my first guesses.

No it is on an independent circuit and is the only instrument connected. i know it probably has spikes in current but just thinking what might be causing it. And having basic electrical knowledge, if i can possibly check it myself rather than calliing a technician.

In case this additional information helps someone to suggest a remedy. I noticed that the freezer goes out every night. I have reduced the set point to -75 and still it trips the circuit every night and the temperature in the morning is around -25.

Hi Mr.Don,

Upon power up with lid close, the centrifuge will get into vacumn mode. It able to reach the desire vacumnlevel without any problem. Regardless of what temperature we set, the current temperature always showing -5C and cause the centrifuge unale to proceed into spin mode. Our lab ambient temperature is app 25C.

I do agree with you that it could be due to firmware issues. We did escalate to Beckman and they claimed that the mainboard need to be replace and it'll be very costly.

Is there a way to RESET the firmware or download it?

Or maybe is there a way to by-pass temperature?

Appreciate for your help...

HI,

What's the ampere draw by both compressor during kick start and during idle? Pls verify the compressor surface temperature also. It should not greater thaN 100C.

Kindly verify that the condenser filter is not block/clog as well.

The freezer was off for a while and now when we turn on, the circuit trips within 30 seconds. Everything is at room temperature. Have not checked how much ampereage is being drawn.