Riso a3 drum do not have ink when printing rz 370ep

someone assist me on what to do here I'm stuck

All you really have to do is put in the ink color you want and run a bunch of prints. Going from a light to dark color like black is fast--like about 3000 prints. Black to light color is going to be a lot more prints. Best is to print something with heavy ink. the more ink you put out the fast it will change color.

There should be a built in head cleaner. I think you can access it through the control panel, then device and printers. right click on the printer with the issue, scroll down to printer properties. there should be a box that says "print test page" when the test page prints it should ask you if it is ok, this is where the clean head should be.

i think your copier was not used for a long time , so the nozzles inside the drum unit are dry and blocked and you are getting d17 -237 , that over ink on one side of the drum and not evenly covered with ink . you need to take off the drum unit and if possible open it , take off the film , and get inside and clean the nozzles . if not , you will be forced to change your drum unit .

P18-531 means: Print drum lock sensor is still ON even after 100 milliseconds after the print drum lock solenoid is activated.

only solution is to buy a B4 drum, to costly and involved to modify A4 or other drum and will create many problems in paper transport timing.

Riso error code p98

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F01-115 means no master on drum at start of printing. Make sure you make a master before trying to print.

D04-534 means incorrect ink cartridge set. This could be caused either a) it IS the incorrect ink cartridge, or b) the RF tag that is struck to the end of the ink bottle is damaged. Try a new ink bottle.
Make sure to use RISO ink designed and made specific for an RZ230.