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Merge: Tank-Heizstab an WP1 bleibt bewusst auf extern
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2 parents 52afd3e + 469f577 commit 22c3046

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‎MQTT-Topics.md‎

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unit 2 runs hot water - it uncouples itself from the hydraulics for a DHW run
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while unit 1 keeps heating. It becomes live the moment a tank is configured
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there, which is worth knowing before that day and not after it.
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**It stays as it is, deliberately** (owner, 2026-08-31). Correcting it is not
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possible without first enabling the tank connection on unit 1 - and that would
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mean configuring hardware that is not there, which is precisely the fault that
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took unit 2 down that morning. Tidying the value would risk the very failure
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the value documents. The topic is what makes leaving it safe: it reports the
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setting without anyone having to open a menu, so if a tank is ever fitted
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there, the state is known before it is needed rather than after.
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* **Heater capacity read `9 kW` on unit 1 against `3 kW` on unit 2** - and this
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one turned out to be the sharpest argument for reading these bytes at all.
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This model only ships with a 3 kW backup heater, so unit 1 was configured for

‎src/version.h‎

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// der gemeinsame Ausgangszustand beider Anlagen. An WP1 ist er
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// derzeit folgenlos: dort haengt kein Speicher (TOP10 = -128, TOP58
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// Blocked, TOP91 = 0 Stunden). Er wird scharf, sobald dort ein Tank
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// konfiguriert wird.
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// konfiguriert wird - und BLEIBT BEWUSST STEHEN (Owner,
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// 2026-08-31): Den Menuepunkt gibt es erst nach Freigabe der
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// Tank-Verbindung, und die freizugeben hiesse, Hardware zu
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// konfigurieren, die es nicht gibt. Genau daran ist WP2 an diesem
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// Morgen ausgefallen. Das Aufraeumen des Wertes wuerde also den
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// Fehler riskieren, den der Wert dokumentiert.
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// - Die Heizstab-Leistung las an WP1 9 kW, an WP2 3 kW - und dieser
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// Befund ist das schaerfste Argument fuer die ganze Aenderung.
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// Diesen Geraetetyp gibt es nur mit 3 kW; WP1 war also auf Hardware

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