What does a flashing H mean on the ATV21 and ATV212 Drives?

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Issue:
Flashing H on the ATV21 and ATV212 Drives

Product Line:

Altivar 21 and 212

Environment:
All

Cause:
Flashing H and he drive resets

Resolution:
The flashing H means the drive controller is approaching an overheating fault.
Check the heat sink cooling on the drive. If this is a S-Flex, check for anything that might restrict air flow near the top of the drives vent as well as checking the drive's cooling fan.