Newbie help: Sanyo Tenka Getter Error Code 2

[PsychFox]

Hi all. I’ve just bought my first machine, a Sanyo “TenkaGetter Hideyoshi” pachinko machine.
Ive had a few quick plays and it seems to work fine, only there is a voice repeating some sort of warning message on a constant loop (not speaking Japanese, I don’t know what it’s saying). There is also a number 2 flashing on the little digital display in the back. I’ve tried holding down the red button in the back while powering up. This resulted in a bleeping alarm to go off for about 20-30 seconds when the machine booted, but didn’t change anything else.
Any help would be greatly appreciated!

I’ll post some pictures and, if I can, the audio message that’s playing soon.

Many thanks!