HPLC 1260 ALS error EE34308

Question

Hello, 
 The HPLC 1260 I have been using has been triggering an error. The logbook states the error is EE34308 101001002 "vial gripper error" and unexpected block during gripper movement. Does anyone know what might have caused this and how to fix it? 
 
 The manual states that EE34308 error refers to the gripper finger movements.

ankugler · Answer

This error messages states that the grippe arm was failing in putting a vial back into place. The vial seems to be still held in the gripper fingers. 
 After the injection, the gripper arm is picking up the vial from the injection position and puts it back into its dedicated tray location. The gripper releases the vial by opening the fingers and the gripper arm is being moved upwards. Then the gripper fingers are being closed to check for free operation and in case the fingers cannot be closed the module is throwing this error. 
 Most likely the vial just got stuck somehow on the fingers either due to some sticky stuff or based on some mechanical interaction. 
 Please also verify that you are using correct vials and caps. 
 The caps must not have a larger diameter than the vials. 
 Also think about replacing the finger caps as they can wear or just be contaminated somehow.