The Coinco 3340-3341-S single price coin changers are know to have coin acceptance problems, mostly dimes and nickels. Make sure the coin path is clean. There are several things that you can do to effect the coin acceptance, but the most basic thing is to clear the memory (this is the portion of the software that stores the calibration of coins. After you clear the memory it will retore to factory specifications) Set all of the price switches to the “OFF” position. With the power turned on press the coin return lever down 20 times, reset the price and try to see if it accepts all coins. If this does not work please contact me and I can explain how you can tune and calibrate this coin changer. The tuning of the 3340-S series can be done.
Replacement options are a Coinco 9360-S or Mars TRC-6800H that can be purchase with a warranty for $35.00
Phoenix Vending Systems
888-858-8583