Siemens alarm 611U-A815: Power module temperature, pre-alarm

What it means

Warning-tier precursor of fault 515: heatsink temperature crossed the alarm threshold; if the condition persists the drive shuts down after about 20 s. Treat it as the last chance to clean filters/fans before production stops.

Likely causes

• clogged air filters, failed fan
• ambient temperature/altitude outside planning data
• pulse frequency above module rating
• duty cycle beyond S1/S6 rating of the power section

Replacement parts

We supply the following units for this alarm — tested, warranty-backed:

• cabinet fan/filter media

  infeed · Primary suspect

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• 6SN1123-… / 6SN1124-…

  power-module · Check if others ruled out

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