We are new to vending (18 months) and new to this board. We have a DN2145 that is having this same problem - meaning that it keeps beeping and giving the message "Remove Product." We bought this machine and a used DN5591 from another vendor, but have not yet put either in a location. I replaced the sensor in the DN2145 with the sensor from the DN5591 (both sensors have the same part number).
After doing the replacement, the DN2145 continued to beep. But I adjusted the screws in the plate around the sensor and the beeping stopped. I assumed that meant the sensor was not properly aligned and the adjustment straightened out the beam.
The first bottle that I tested fell straight down and got stuck. I could not reach in to take it out. So, the sensor started beeping - because this time there really was a product that needed to be removed. I opened up the machine and got the product out, but the beeping did not stop. I unplugged the machine and plugged in back in and the beeping stopped.
I then vended a second bottle. It worked fine.
I vended a third bottle and it seemed to work fine -- for about 15 seconds, then the beeping started again. I have tried adjusted the screws again and unplugging and re-plugging the machine in, but I can't get the beeping to stop.
I am wondering whether the replacement sensor I used could have also have been bad. If I bought a new sensor, should that fix the problem? Or, does this sound like a situation where the board is bad? If the board is bad, would cutting the wires like discussed above solve the problem? Any thoughts would be appreciated. Thanks.