26
Startup prevented
Vacon · NX Liquid-Cooled Drive
What does 26 mean?
The start-up of the drive has been prevented. Subcodes specify the reason: S1 for prevention of accidental start-up, S2 if the START command is active when returning to READY state after Safe Disable, or S30 if START is active after system/application software download or application change.
Source: Vacon NX Liquid-Cooled Drive
Open Manual (Page 154)