What is meant by the exclamation mark next to the "fan" wifi symbol?

[AC Question]

On my Moto G recently upgraded to Lollipop 5.0.2 and trying to connect to a Selphy printer: as well, an exclamation mark also appeared next to the "triangle" symbol for signal strength. Grateful for any help.

 

[Snapphane]

Just the "fan" mean it's on the network and that it has Internet. The exclamation mark means that it's on the network but has failed to get Internet. If it's printer it probably should be no Internet on that network