Mp140 display shows E 5 , book says push maint

E, 5
The FINE Cartridge cannot be recognized.
Possible causes are as follows:
The FINE Cartridge may not be installed properly.
The FINE Cartridge may not be compatible with this machine.
Install the appropriate FINE Cartridge. If lines are misaligned or the resulting output is not satisfactory, carry out the Print Head Alignment.