Chard Posted July 18, 2016 Share Posted July 18, 2016 I have an AMS Sensit II that will intermittently loose power to the board and the compressor will not come on. There is still power coming through the machine because the light is still on. The other day I went and traced the power with a voltmeter all the way to the transformer (has two transformers mounted one above the other, one for heating the glass and the other to power the board). Power in was good and power out was good. However I could not measure power from the transformer to the board. I suspected a bad wire,but when I unplugged the 24v side of the transformer and plugged it back in everything started working. During this time I'm plugging and unplugging power to the machine and turning the switch on and turning it off. With everything working again, I couldn't troubleshoot any more so I left. Well, now its doing it again. I called AMS and they think it sounds like a 24v transformer that is overheating. I've ordered one to put in, but I'm out of ideas beyond the power line between the board and the transformer. Any help would be appreciated. Link to comment Share on other sites More sharing options...
lacanteen Posted July 18, 2016 Share Posted July 18, 2016 It could be a payment system or relay loading the 24V circuit down. Replace the changer (most likely culprit) first. Could also be the refrigeration relay or the refrigeration system itself. Check wall voltage before and after refrigeration start. Link to comment Share on other sites More sharing options...
Chard Posted July 20, 2016 Author Share Posted July 20, 2016 I got the part in yesterday and got it installed. The transformer was the problem. It was overheating and shutting down. Before I replaced it, I checked voltage with a multimeter and it had 115v in and nothing out. Link to comment Share on other sites More sharing options...
brendio Posted April 8, 2017 Share Posted April 8, 2017 Reviving an old thread: Can anyone tell me what the power rating of the transformers in the AMS are? I am converting a machine from 110 to 240 V and trying to source the right transformer locally. The AMS parts manual just gives a part number but no details on power and current ratings. I have another machine that the previous owner converted and it has a 160 VA transformer, but just the one running the board and the window heater. I'm trying to decide whether to just copy this arrangement or use two smaller trannies as per the circuit diagram. Link to comment Share on other sites More sharing options...
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