Mon Dec 22 2025

Amsco 400 series

On startup this 1 unit goes into depressurization, 20min. But stops around the 10 min mark. Customer says it sits there all day and they cant use it. 

Is that a normal part of the cycle on the 400s? Chamber is empty, I can open the door and it makes no difference. 

When the countdown stops, could it be a calibration issue? 

What is thia depressurization, is it the sterilizer or the boiler, is it a feature that can be turned off?


   RE: Sterilizers/Autoclaves Report Post
Tue Dec 23 2025Reply from MapleTreeBiomed
MapleTreeBiomed

Hey Chris, 

I got the user manual off the Steris site HERE. I downloaded the french version then put the PDF through google translate. Section 9-12 and 9-13 talk about the depressurizing of the generator error. I'm guessing this unit has it's own steam generator and isn't plumbed to a steam supply? There is a pressure sensor for the steam generator and I'm sure a solenoid or two around it. 


Andrew Whyte, CBET, Maple Tree Biomedical LLC
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