Welp I was dead wrong (wouldn't be the first time
) about this power supply having only 36V outputs instead of 60V. During some additional testing I found that the power supply was outputting up to 60V during operation. This was happening when the unit's Peltier element or thermoelectric module (TEM) was cooling at max setting. I wasn't even sure exactly what the 60V output was powering until now. This is the challenge involved with working on equipment without service manuals/schematics which is why I am big advocate of right to repair. Also, according to the system monitoring application in the unit's software, the TEM was pulling upwards of 8-8.5A! The power supply is only rated for 8A on the 60V output!
I still think this topic is worth keeping in this forum because of how quickly after the warranty this power supply failed (almost exactly 3 yrs which is the length of the warranty).
I do have some questions though for anyone who might have some input:
1) Can anyone speculate as to why this power supply was only outputting ~30V on the 60V outputs when it was removed from the unit? The 24V output was putting out 24V. There are these logic connectors on each of the output modules (see photo). But the 24V module has that input as well. Potentially how is the circuitry this SMPS supplies triggering the SMPS's full output?
2) When I performed load testing on the SMPS out of circuit, I could only drive it up to 5A, before two of the power MOSFETs on one of the 60V output modules shorted out. In parallel, the two 60V modules should be able to handle 8A. Also, as I mentioned earlier, the current measured on the 60V output by the centrifuge's software was measured at over 8A. How could it handle 8A in-circuit, but not out of circuit?
I apologize for my first post without having collected more information. Also, for anyone who needs it, the service code for putting this centrifuge into service mode is 372466. I don't believe the manufacturer hands this out to customers and this code allows you to perform calibrations of the unit's rotor motor, temperature control, and vacuum pump.