¶ Step 1: Check the ACE Pro signal cable
Re-plug the signal cable connecting the printer to the ACE Pro and check if the printer still reports this error.
¶ Step 2: Check the ACE Pro power cord
Then check that the ACE Pro's power cord is off and the machine switch is on.
¶ Step 3: Check the ACE Pro
Load a roll of filament into ACE Pro to check if ACE Pro can feed properly.
