Siemens alarm 300515: Axis %1 drive %2 heat sink temperature alarm
SINUMERIK 840D/810D powerline drive alarm (SIMODRIVE 611D) · SIMODRIVE 611D/611U
What it means
Heatsink temperature of the 611D power unit exceeded the warning/alarm threshold.
Likely causes
- cabinet cooling fan failed or filter blocked
- heatsink fouled with dust/oil mist
- ambient temperature too high
- continuous overload beyond module rating
- failed internal temperature sensor on the module
Triage note: Clean filters/heatsink and verify load duty cycle before replacing the power module.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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cabinet/module fan kit (per cabinet build)
cooling fan · Primary suspect
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6SN1123-…
SIMODRIVE 611D power module (if overheating persists clean & correctly loaded) · Common cause
Need the part urgently?
Send us alarm 300515 with your machine details — typical RFQ turnaround is 24–48h.