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Edit in Desk ↗Igniter cell interlock nuisance-trips on cold start
Closedteam@spacex.demo · 2026-09-26 · ISS-SPAX-0016
Customer
European Space Agency
Europe · owner: casey.kim
Machine / asset
Merlin 1DMerlin 1D
serial M1D-IG-0459 · MACH-0006
DisciplineAutomation
PriorityMedium
Spares statusNone
Last updated2026-10-09 11:31
Description
Igniter cell safety interlock trips on the first start of the day when ambient is below roughly 10°C, requiring a manual reset before the campaign can begin.
Work log
Currently: Shipped3 entries- CKcasey.kimShippedOct 9 · 11:31 AM
PLC recipe updated on site and signed off by the ESA test lead.
- CKcasey.kimFixedOct 4 · 11:31 AM
Threshold re-characterised across the full ambient range.
- CKcasey.kimReviewedSep 26 · 11:31 PM
Reproduced on a cold morning at Kourou. Only ever the first start.
Resolution
Interlock threshold was calibrated at 20°C ambient. Re-characterised across the full 5–35°C range and the trip point moved into the PLC recipe so it is site-adjustable.
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