If the machine which has this option enters the energy save mode, you cannot print because there will be a communication error. Follow the instructions below to disable the energy save mode.
MP 501/601
Press the [User Tools] icon on the operation panel.
Press [Machine Features].
Press [Administrator Tools] in [System Settings].
Press [Energy Saver Mode to Disable Print Server].
Press [Disable Mode].
Press [OK].
SP 5300/5310
Select [System] -> Press [OK] on the controller panel.
Select [Engy Sv Md to Dsbl Prt Srv] -> Press [OK].
Select [Disable Mode] -> Press [OK].