The keypad does not want to twist very easily.
The spindle length is to long. Parts of the keypad are rubbing against each other and causing friction. Mechanical problem with the keypad.
Remove the keypad and examine the spindle length making sure that there is not pressure getting exerted on the lock body. Note:A locksmith is recommended to perform this action. Add (G3-22L) lubricant to the plastic portions outlined in the pictures below.To obtain this special lubricant please contact General Rubber & Plastics.
Contact your safe manufacture or a safe and vault technician for further assistance.
Z02, Z03 D-Drive