What to do if my technoswitch Control Panel shows an A C Fault?
- KKaren MullinsAug 21, 2025
An A C Fault on your technoswitch Control Panel can occur due to several reasons: * Insufficient AC input: Check the mains supply or the termination to the PSU AC input. * Damaged input fuse or MOVs: Replace the fuse and investigate for an unstable mains supply. * AC input exceeding rating: Check the mains supply.


