A user facility biomedical technician (biomed) reported to fresenius technical support (ts) that a 2008k2 hemodialysis (hd) machine would not power on.
Reportedly, it had turned off when the staff attempted to put it into rinse mode, and it wouldnt turn back on.
The machine was subsequently pulled from service for evaluation.
When the biomed tried turning it on in the back room, they stated that nothing happened; not even the fan was making a noise.
They attempted to resolve the issue by replacing the power supply assembly.
The biomed used a power supply that was purchased from another vendor, svs dialysis.
The biomed stated they purchase parts from svs because the prices are significantly cheaper.
However, the biomed was also quick to note that these parts are not considered certified.
The biomed stated the svs parts are not held to the same quality standards as some other suppliers.
After installing the power supply from svs dialysis, when the biomed first turned the machine on they heard a snap, or a crack.
They then saw smoke coming out of the back of the machine.
The biomed immediately looked behind the machine and noticed a flame that looked to be approximately 1-inch tall.
They were able to see this because the power supply was not locked in.
The biomed stated the screws that go through the blood pump module were not put back in yet.
The biomed slid the power supply out of the machine and blew out the flame.
The smoke detector did not go off and the use of a fire extinguisher was not necessary.
After examining the power supply, the biomed was able to identify the capacitor on the power control board as the source of the flame.
The biomed stated the power control board is part of the power supply assembly.
On the power control board, the biomed saw that the capacitor (c10) was cracked open across the width, and charred.
The biomed was confident that the capacitor was what blew up.
The biomed stated that the surrounding areas of the capacitor were charred/blackened.
Ic4 looked charred, as did resistors 13, 14, 15, and 16.
The connector that goes from the power control board to the power logic board was also burnt.
No damage was identified on any other components.
The biomed ordered and received a new power supply assembly from fresenius, but the part had not yet been installed.
They anticipate that installing the new power supply assembly will resolve the issue.
The 2008k2 hd machine, which was reportedly refurbished, had 8,898 hours on it.
The machine was plugged into a hospital grade ground-fault circuit interrupter (gfci) outlet and had no previous history of failing the electrical leakage test.
The biomed kept the power control board and stated that they would contact fresenius technical support to set up an rga for the part to be returned for failure analysis.
The remaining power supply subcomponents were scrapped.
A photo of the damaged power control board was provided for review.
There was no patient involvement associated with the reported event.
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