Code Name Causes Possible Solutions oL5 Mechanical Weakening Detection 1 The drive detected overtorque as specified by the conditions for mechanical weakening detection set in L6-08 [Mechanical Fatigue Detect Select]. Do a deterioration diagnostic test on the machine side. Note: Do a Fault Reset to clear the fault. If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L6-08.