The lights on the charger indicate the status of the charger. The different colours provide details about how the charger is working.
This is also available within the quick start guide.
White - Charger in Standby
Blue - Car Connected
Green - Charging in Progress
Red - Charger locked (check setting in app)
Yellow - Smart schedule active
Purple (flashing) - firmware update in progress
Blue (flashing) - Identifying charger.
Red (flashing) - Fault Detected (Reset charger by powering off/on)