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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.
CTEK Assist for SMARTPASS 120T
How can I tell if my SMARTPASS is working, and what do the LED lights mean?
SMARTPASS uses different LED combinations to show operating status, charging activity, and any detected faults. Because the meaning of each light pattern depends on the specific model, please refer to the SMARTPASS user manual for a full explanation of the LED sequences.
The manual can be found on the CTEK website, and it provides detailed descriptions of each status and error indication.