Maintenance And Diagnostics - Vacon 20 X Installation, Technical And Maintenance Manual

vacon • 109
9.8

Maintenance and diagnostics

If any service or repair has to be conducted on the drive installed, please inspect the
checklist given in Table 45.
During maintenance breaks, or in case of service/repair, ALWAYS make sure that the
STO function is available and fully functional by testing it.
The STO function or the STO input/output terminals do not need any maintenance.
The following table shows faults that may be generated by the software that monitors the hardware
related to the STO safety function. If you detect any failure in safety functions, including STO, contact
your local Vacon supplier.
Fault Code
9
Fault
30 STO fault
Table 46. Fault related to the STO function.
Cause
STO inputs in a different
state or both de-ener-
gized
Safe Torque Off
Correction
Check cabling