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Vendo 511 troubleshooting


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I have a vendo 511 which has suddenly started vending free soda. There is an error code ER9 BJ which is a bill jam but no jams in the validator the validator light is coming on when the door button is pressed but goes off after a few seconds. I tried unplugging both the validator and the coin mech and the machine still did free vends. Also the lamps in the door are no longer


Could this be a board problem? or something to do with the lamp ballasts or would a new validator solve the problem? If anyone can help it would be much appreciated. Thankyou.

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