From f61c25f449529292883cdffdec838a9abbef36e9 Mon Sep 17 00:00:00 2001 From: Mariusz Pacek Date: Sun, 25 Oct 2026 08:31:26 +0100 Subject: [PATCH] docs(frisko): the +20 min meter step is the compressor's second stage The owner says the CWU heater is not connected; the per-phase meter data show the step splits evenly over the three phases while stage 4114 goes from 33 to 66, so it is the compressor, not a heater. At an outlet of 52 C (TmaxPc) the compressor stops. Co-Authored-By: Claude Opus 5.5 --- docs/frisko/history-2026-10.md | 19 +++++++++++-------- docs/frisko/rx910-se21.md | 5 +++-- 2 files changed, 14 insertions(+), 10 deletions(-) diff --git a/docs/frisko/history-2026-10.md b/docs/frisko/history-2026-10.md index 3c8365b..bf23fae 100644 --- a/docs/frisko/history-2026-10.md +++ b/docs/frisko/history-2026-10.md @@ -52,17 +52,17 @@ Verified from history, 2026-10-24, 167 samples. Rule: compare the target with th The electric CWU heater is NOT physically connected (owner, 2026-10-25). Output 4115 = 100 and `zb_state` 2 only mean the controller's heater signal after 20 min of a CWU cycle; nothing is heated -by it. Below, "heater" means that signal. The meter step at +20 min is real but its cause is -unexplained; hypotheses: a compressor stage change (the controller does it at the same delay), another -load on the same relay or phase, a circulation or pump switched with the signal. Do not read it as -heater power. To test: log stage 4114 and the pumps' outputs around +20 min and compare the per-phase step. +by it. Below, "heater" means that signal. The meter step at +20 min is the compressor's second stage +(verified 2026-10-25): on 10-24 at 18:14:13 stage 4114 read 33, at 18:19:13 66; the meter rose at +18:15 by ~940 W, split evenly over the phases (+330 / +300 / +310 W), a three-phase load, not a +single-phase heater. The controller raises the stage and the heater signal together. Episodes in `heat_pump` (10-24); meter steps from `electricity.PRAD2` `total_power_active`. | Episode | On (sample window) | Off | Preceding CWU run | State at start | |---|---|---|---|---| -| 1 | 11:43:48..11:48:48 | 12:04:56..12:09:56 (period end) | compressor since 11:24:55, ~20-24 min | stage 66, cwu 28 / target 43, outlet 39, outdoor 11 | -| 2 | 18:14:13..18:19:13 (meter 18:15:13, +937 W) | ~18:20 (meter -3.7 kW) | compressor since 17:55:23, 19.8 min | stage 66, cwu 40.6 / 43, outlet 46 then 51.7 | +| 1 | 11:43:48..11:48:48 | 12:04:56..12:09:56 (period end) | compressor since 11:24:55, ~20-24 min | stage 33 → 66, cwu 28 / target 43, outlet 39, outdoor 11 | +| 2 | 18:14:13..18:19:13 (meter 18:15:13, +937 W) | ~18:20 (meter -3.7 kW) | compressor since 17:55:23, 19.8 min | stage 33 → 66, cwu 40.6 / 43, outlet 46 then 51.7 | Verified from history: - The heater joins 20.0 min (+-0.1) after the compressor starts a CWU cycle, if the cycle is still on. @@ -78,8 +78,11 @@ Verified from history: outlet 51.7, compressor and heater off, outlet 42.1 five minutes later, cwu 42.2 below target). The compressor restarts ~18:25:30 (stage 33) without the heater (not 20 min) and stops at 18:30 when cwu reaches 43.0. Evening heater runs last 1-10 min (meter), ending at the outlet limit. -- The 0.67-0.96 kW step lasts as long as the signal; it is small next to the compressor (+1.4-1.7 kW - at stage 33, about +3 kW with the pumps at 66). +- The 0.67-0.96 kW step is stage 2 (66 %) over stage 1 (33 %). Over the house base (~1.0 kW on 10-24 + evening) the pump draws +1.9..2.5 kW at stage 1 (rising as the outlet warms) and +3.4..3.7 kW at + stage 2. It lasts until the compressor stops. +- At an outlet of 52 C (TmaxPc 4158) the controller stops the compressor because the outlet is too hot + (owner, 2026-10-25; seen 18:19-18:20 at 51.7 C); it restarts at stage 1 once the outlet has cooled. Hypothesis: the signal delay is measured from the compressor start of a CWU request, not from a temperature condition. A cycle that finishes within 20 min never raises it. diff --git a/docs/frisko/rx910-se21.md b/docs/frisko/rx910-se21.md index b17f456..92a988c 100644 --- a/docs/frisko/rx910-se21.md +++ b/docs/frisko/rx910-se21.md @@ -48,6 +48,7 @@ the Frisko app. Party mode (4140 = 2, hours in 4142) is a simpler "heat now" ove pressure-switch trips; three trips in one cycle latch a fault until manual reset (MR208-PC+ docs). - Frisko phone app: direct Modbus TCP, LAN only, 200–300 ms between requests, 5 s timeout. - History analysis of 2026-10 ([history-2026-10.md](history-2026-10.md)): the heater signal comes 20 min into a - CWU cycle (4147), `zb_state` 2 = that signal. The heater is not connected (owner, 2026-10-25); the meter - step at +20 min is unexplained; 4227 is unreliable for "heating CWU"; the controller clock + CWU cycle (4147), `zb_state` 2 = that signal. The heater is not connected (owner, 2026-10-25); at the + same moment the compressor goes from stage 1 to 2 (the +0.9 kW meter step, three-phase); at an outlet + of 52 °C (TmaxPc) it stops; 4227 is unreliable for "heating CWU"; the controller clock does not follow DST; period = target compared with the setpoints, valid only with 4226 = 1.