CTEK Assist helps you with everyday questions for your 12v/24v or EV Chargers and includes product information, a product selector tool, troubleshooting, user manuals, compatible accessories and much more.
Permanent Red Light / Alarm
Try this solution
Check the incoming voltage (V) on all phases (L1, L2, L3) in the charge box
This is to ensure that the fault is not in the main fuse or incoming supply.