How to solve the error code no.T12-302 from risograph Rz 570.

Possible fix at link below, but did not see 302:

https://printcopy.info/?mod=erc&brand=Riso&model=RZ570&page=17

Quoting from link above:

"Code: T12Description:Master disposal area motor lockCauses:300 Overload current was detected in the master disposal motor. 301 Master compression motor lock when moving compression plate up. 305 Master compression sensor does not go ON within 6.5 seconds after the master compression motor operates in the return direction. 305 Master compression sensor does not go ON within 7.5 seconds after the master compression motor operates in the return direction. 306 Master compression sensor does not go OFF within 2 seconds after the master compression motor operates in the compress direction. 307 Master compression plate maximum position is not detected within 6.5 seconds after the master compression motor operates in the compress direction. 307 Master compression plate maximum position is not detected within 7.5 seconds after the master compression motor operates in the compress direction. 309 The FG sensor status on the master compression motor does not change even after 2 seconds from the motor activation. 309 Master-compression-motor encoder sensor count did not change as the master compression motor activated in the compress direction and moved out from the home position. 309 The FG sensor status on the master compression motor did not change for 50 consecutive times during 10 millisecond polling. 316 Master-compression-motor encoder sensor count did not change within 10 milliseconds after the master compression motor activated. 316 The master-disposal-motor FG sensor count dropped to 50% of the set speed. (The speed check starts 2 seconds after the activation of the motor.)Remedy:Press Reset Key."

Service manual link at web site: https://printcopy.info/?mod=srch&inmod=docs&brand=Riso&strSearch=RZ570