The smart thermostat, made Wiser.Learn more
...See what we've been doing in some of our major markets.Find your Location
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Schneider Electric USA Website×
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
What does a flashing H mean on the ATV21 and ATV212 drives?
Altivar 21 and 212
Flashing H and he drive resets
The flashing H means the drive controller is approaching an overheating fault.
Check the heat sink cooling on the drive. If this is an S-Flex check for anything that might restrict air flow near the top of the drives vent and still check the drives cooling fan.