It's most likely that the printhead is blocked with old, waste ink. The printhead is the cradle which holds the cartridges and moved across the printer when printing. Epson are particularly prone to printhead blockages.
You can try running the nozzle-cleaning utility in the printer preferences but I fear the blockage is too severe for that.
Time to remove the printhead and leave it to soak overnight in a bowl of warm soapy water.
Next day, rinse well in cold water and leave to dry before reassembly.
To avoid reoccurence of problem, use your printer at least every other day using all colours. This will keep the printhead loaded with fresh ink.
If you only need a printer a couple of times a month then an inkjet one is not...