This is mainly due to dirty machine. Try following my steps:-
1. Press the Menu & Mono start keys. Next press the up arrow key 4 times to make the machine enter the maintenance mode.
2. Enter 8 & 0 by using the up arrow key & SET keys.
3. Press the mono start key several times untill the purge count appears on the LCD.
4. Enter 2 7 8 & 3 by using the up arrow key & set keys to reset the purge count to zero.
5. Press the stop/exit key to return to the initial stage of the maintanance mode.
6. Enter 9 twice by using the up arrow & set key’s to exit from maintenance mode
见到呢句嘢unable to clran 46.放心部機無事
要回廠 rst .