61EN14 AppendixTroubleshootingSymptoms Location to investigate SolutionThe electric screwdriverdoes not operateIs the power plug inserted into anoutlet?Is power supplied to the outlet?Properly insert the power plug into the outlet.Check the power supply.Is the workpiece signal set to “1:Input”?Set up a workpiece or set the workpiece signal to “0:Do not input”. (p. 19, p. 49)Is the changeover switch set toneutral? Slide the changeover switch to the R or L side.Is the operation No. 7 “Lower limit ofscrew fastening time” set to “0 sec.(OFF)” when “Reverse after the lowerlimit of screw fastening time” is set inthe auto reverse mode?Set a numeric value for operation No. 7 “Lowerlimit of screw fastening time”. Or set auto reversemode to “0: OFF” and “1: Reverse after torque-up”.(p. 18, p. 28)Is the setting mode other than screwfastening mode set?Press and hold the [SELECT] button to return toscrew fastening mode.Is the workpiece setup time too long?The tool does not operate during theworkpiece setup time.Shorten the workpiece setup time. (p. 51)Is the NG signal output time too long?The tool does not operate during theNG signal output time.Shorten the NG signal output time. (p. 36)Is the signal line connected to theexternal signal connector?Is external 24 DC power supplied?Properly connect the signal line to the externalsignal connector.Check the external power supply.Are the wires of the external signalinput and output properly connected?Are electronic parts to be usedproperly connected?Check the wiring.Also, carefully read the instruction manual of theelectronic parts to be used.Is noise applied to the external signalline?Is the line bundled with the powercable?Check by only connecting an electric screwdriver tothe external signal line and power line.Make sure to take sufficient noise measures suchas setting up grounding.Is a forced stop signal being input? If a forced stop signal is turned ON, the electricscrewdriver does not operate. Turn it OFF.Is NG display E1 to E9 beingdisplayed? Check the content of the NG display. (p. 20)Has the security has been set? Use a remote controller to cancel it.Has each setting been set accordingto the instruction manual?If you forgot about the setting, perform initialization.(p. 21)E8 (Motor-Lock) occursfrequentlyDoes the output torque value andspeed level have room?Decrease the output torque value or decrease thespeed level. The specification range is a standard.Depending on the fastening conditions, it may notbe possible to use the function. (p. 7)Has the torque adjustment ring beenraised too much?Lower the torque adjustment ring.If it is raised too much, it touches the torque springand torque cannot reach the set torque. (p. 17)Is E8 displayed under no load status? If E8 is displayed under no load status, a failure issuspected.Is the bit rotated under no load status? If the bit does not rotate and E8 is displayed afailure is suspected.TV07521-1_DLV30S12P-AYK_en.indb 61 2017/02/10 15:56:38