warning Cen

Error Code Red Reverse Connection LED turns on

The chargers clamps are attached to the wrong battery terminals.

? What Causes This

Improper connection of charger cables to battery terminals.

How to Fix It

Unplug charger if it is plugged in and reverse the connections.

Source: page 13 of the official manual

From the manual

Manual page 13 — Cen error Red Reverse Connection LED turns on

This error code appears in:

Cen Tech 60581