The E1 code indicates a fault with either the machine or the way outlet hose is installed.
If it was installed by a third party give them a call.
If you installed it yourself have a good look at the user guide and see if the placement of the hose could be improved. Make sure there is not a 'dog-leg' bend in the hose. If the error code persists call the supplier as it might indicate a fault with the machine.
Answers & Comments
The E1 code indicates a fault with either the machine or the way outlet hose is installed.
If it was installed by a third party give them a call.
If you installed it yourself have a good look at the user guide and see if the placement of the hose could be improved. Make sure there is not a 'dog-leg' bend in the hose. If the error code persists call the supplier as it might indicate a fault with the machine.