how to disable free credits (barcrest mpu5 crown&jewels)

[dan-gambler]

Hello everybody

I have just bought a barcrest fruitmashine (crown & jewels)
i would like to use coins to play, but it keeps giving me free credits (500 each time)
how do i disable this?.....is this possible?

Thanks

Greetings from Denmark

[extreme eddie]

Is the cash door at the bottom closed and locked? My machine gives free credits when the door is open.