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[Equipment] PR System One Series 50 Humidifier Problem
PR System One Series 50 Humidifier Problem
Just got a low-time PR System One Series 50 CPAP from an estate as a travel spare.  I've been using a series 60 (with heated tube) for a long time.  

The Series 50 humidifier 'hot plate' is not heating up even though the CPAP humidifier setting is set to 'on.'  Not sure if there is  any diagnosis testing that I can do with a VOM but I don't know what the 4-port plug leads are set up as.   Anybody out there with any ideas?   Thanks.
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