CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

[2.1.0-beta.6] - 2026-04-03

Added

• Electricity cost estimation sensor — configure an electricity price entity to track cumulative energy costs (#273)
• Repair flow to onboard existing users to the electricity cost feature (#273)
• electrical_power sensor (kW) derived from external power entity or Modbus register (#273)
• Currency-aware descriptions in config/options/repair flows using {currency} placeholder (#273)

Fixed

• Gateway sentinel filtering — Modbus sentinel values (-127, -67) for absent sensors are now filtered at the gateway layer instead of propagating to entities and telemetry (#272)
• Module gating — unconfigured modules (DHW, pool, circuit 2) no longer leak default register values into data and telemetry (#272)
• Remove hardcoded -127 checks from hydraulic entity conditions (#272)
• Restore accumulated electricity cost on restart (#273)

Changed

• Electrical energy resolution centralized in DerivedMetricsAdapter (internal refactor) (#273)
• power_consumption sensor now reads from adapter like all other derived sensors (#273)
• power_consumption sensor attribute source removed — energy source selection is now internal to the adapter (#273)
• Entity recategorization: sensors vs diagnostic (#273)

[2.1.0-beta.5] - 2026-04-01

Changed

• DerivedMetricsAdapter — COP, thermal power, electrical power, and compressor timing are now computed centrally in adapters/derived_metrics.py before entities and telemetry consume the data. COP now uses the external power entity when configured (fixes S80 COP accuracy).
• Dict-based telemetry — MetricPoint dataclass (60+ fields) replaced with plain dicts. Adding a new data key to telemetry requires zero code changes. Client-side daily stats aggregation removed (server-side TimescaleDB continuous aggregate is the source of truth).
• Entities COP, thermal, and timing simplified from complex subclasses (~590 lines) to simple value_fn readers

Fixed

• COP telemetry was wrong for S80 cascade (8.2 avg vs 1.32 in HA) — now uses same calculation path as HA entities
• Grafana dashboard queries migrated to JSONB with time_bucket sampling for performance

Removed

• MetricPoint, DailyStats dataclasses and client-side aggregator
• HitachiYutakiCOPSensor, HitachiYutakiThermalSensor, HitachiYutakiTimingSensor subclasses

[2.1.0-beta.4] - 2026-03-30

Added

• Add DHW demand mode diagnostic sensor (standard/high demand) read from STATUS register — disabled by default (#255)

Fixed

• Compute thermal power, electrical power, and COP in telemetry collector instead of sending null values to backend

[2.1.0-beta.3] - 2026-03-29

Added

• Anonymous telemetry system (Off / On) — helps build realistic test fixtures for all heat pump models (Discussion #200)
• Telemetry consent step in config flow (options) and repair flow for existing users
• Telemetry diagnostic sensor (sensor.telemetry_status) with send tracking attributes
• Backend: Cloudflare Worker (ingestion proxy), TigerData migrations, R2 cold archive

[2.1.0-beta.2] - 2026-03-29

Fixed

• Fix gateway sync state sensor showing raw integer instead of translated string during initializing/desynchronized states (#254)
• Fix entities remaining "available" with stale data when gateway is stuck in initializing state (#254)
• Reduce log spam from ~685 identical warnings to periodic reminders every 5 minutes during extended gateway sync issues (#254)
• Add adaptive polling backoff (5s → 10s → ... → 300s max) when gateway is not ready, reducing unnecessary Modbus traffic (#254)

Changed

• Refactor config flow to provider-based orchestrator — each gateway declares its own configuration steps via GatewayConfigProvider protocol, eliminating all gateway-specific conditionals from config_flow.py

[2.1.0-beta.1] - 2026-03-20

Added

• Support for Before Line-up 2016 ATW-MBS-02 gateway — Gen 1 Yutaki S and S Combi units with full read/write support (#248)
• Gateway variant system — config flow asks for hardware generation with auto-detection after connection
• Interactive model decoder tool to identify hardware generation (docs/tools/model-decoder.html)
• Scanner auto-detection and annotation for before-2016 units
• Model nomenclature reference documentation (docs/reference/model-nomenclature.md)
• Config entry migration v2.4 — adds gateway_variant field to existing entries

Fixed

• Fix cooling OTC compensation method showing "Unknown" and not settable on ATW-MBS-02 (#239)
• Entities depending on missing registers (eco mode, DHW boost/high demand) are now hidden automatically on gateways that lack them

Changed

• Reorganize gateway tests to mirror source structure (tests/api/modbus/)

[2.0.2] - 2026-03-09

Fixed

• Remove incorrect tenths conversion on pool target temperature (#233)
• Remove phantom secondary compressor pressure registers at non-existent addresses 1150/1151 (#225)
• Scan interval not editable in reconfiguration flow (options flow missing the field)

Changed

• Migrated runtime data storage from hass.data[DOMAIN] to ConfigEntry.runtime_data (modern HA pattern)
• Restructured documentation: unified docs/ directory, all English, centralized architecture docs
• Slimmed CLAUDE.md to rules and conventions only (details moved to docs/)
• Slimmed CONTRIBUTING.md with pointers to docs/development/

Added

• Water Outlet 2 (Two2) and Water Outlet 3 (Two3) temperature sensors for systems with buffer tanks (#161)
• Local brand assets for HA 2026.3+ brand proxy API
• Base entity module (entity.py) for common-modules quality standard
• Documentation for set_room_temperature service action
• Quality scale tracking file (quality_scale.yaml) for Bronze tier
• Config flow test suite: 12 tests covering user, gateway_config, profile, power, validation, options flow
• docs/architecture.md: unified architecture reference (merged 5 sources)
• docs/development/: getting started, adding entities, Modbus registers, profiles guides
• docs/reference/: entity patterns, domain services, quality scale references
• GitHub issue templates (bug report, feature request) and PR template
• MIT LICENSE file
• CI: test against Python 3.13 and 3.14

Removed

• documentation/ directory (content migrated to docs/)
• In-code READMEs (domain/, adapters/, entities/) absorbed into docs/
• Root TODO-hc-a-mb-registers.md (content in gateway docs)

[2.0.1] - 2026-02-23

Added

• CONTRIBUTING.md with contributor workflow documentation

Changed

• Config flow: removed unused dev_mode option from advanced settings
• Config flow: moved Modbus Device ID from advanced step to gateway configuration step
• Config flow: namespaced Modbus connection keys with modbus_ prefix (modbus_host, modbus_port, modbus_device_id) to prepare for future non-Modbus gateway support
• Automatic config entry migration (v2.1 → v2.2) renames stored connection keys for existing installations
• Dev tooling: bump ruff from 0.13.3 to 0.15.2

Fixed

• HC-A(16/64)MB outdoor compressor registers mapped to wrong address block (5000+offset instead of 30000+offset), causing discharge temp, evaporator temp, current, frequency, and EVO opening to show as unavailable (#96)
• DHW/pool COP calculation used circuit outlet register (1094) instead of HP-level outlet register (1201) — when the 3-way valve redirects to the tank, the circuit register becomes stale, causing zero thermal power and no COP during DHW runs (#205)
• Electrical power unit conversion now uses HA's PowerConverter instead of a naive > 50 heuristic (#182) — a heat pump in standby consuming < 50 W was incorrectly interpreted as kW, causing wildly inaccurate COP values
• Dutch (nl) translations updated

[2.0.0] - 2026-02-12

A major rewrite of the integration with hexagonal architecture, multi-gateway support, and significantly improved accuracy for thermal and COP calculations.

Highlights

• Multi-gateway support: HC-A(16/64)MB alongside ATW-MBS-02
• Hexagonal architecture: pure domain layer, testable without Home Assistant
• Accurate thermal energy: separate heating/cooling tracking, defrost filtering
• Seamless migration: automatic entity migration from v1.9.x with preserved history

Added

• HC-A(16/64)MB gateway support — New Modbus gateway type alongside ATW-MBS-02. Both HC-A16MB and HC-A64MB are protocol-identical (same registers, same features — only the capacity differs: 16 vs 64 indoor units). Introduces a register abstraction layer (HitachiRegisterMap ABC) enabling polymorphic gateway support with separate read/write address ranges, unit_id-based address computation, and gateway-specific deserialization
• Outdoor unit registers for HC-A(16/64)MB gateway (#96) — Compressor frequency, current, discharge/liquid/gas/evaporator temperatures, and expansion valve openings now available on HC-A-MB gateways
• New heat pump profiles — YCC and Yutaki SC Lite profiles for models only available via HC-A(16/64)MB gateway
• External energy sensor (energy_entity) — New optional configuration to replace the Modbus power consumption register with an external lifetime energy sensor (device_class=energy, kWh, TOTAL_INCREASING). The power_consumption entity exposes a source attribute for transparency
• set_room_temperature service — New entity platform service to write measured room temperature to the heat pump via climate entities, enabling automations when the Modbus thermostat is enabled
• Operation state numeric attribute (#187) — Raw Modbus numeric value (0-11) exposed as a code attribute for simpler automation logic
• Conditional circuit climate modes (#186) — Two-circuit setups expose only off/heat_cool (power toggle); single-circuit retains full heat/cool/auto/off control
• Complete hexagonal architecture — Domain layer with pure business logic (zero HA dependencies), adapters layer bridging domain with Home Assistant, 100% testable domain layer
• Domain-driven entity organization — Business domain structure (circuit, compressor, control_unit, dhw, gateway, hydraulic, performance, pool, power, thermal) with builder pattern for all entity types
• Robust Modbus connection recovery — Exponential backoff retry logic with automatic reconnection on network interruptions (#118)
• Enhanced heat pump profile system — Explicit hardware capabilities per model (dhw_min_temp, dhw_max_temp, max_circuits, supports_cooling, max_water_outlet_temp, supports_high_temperature)
• Smart profile auto-detection — Decentralized detection logic with improved Yutampo R32 and S Combi detection
• Recorder-based data rehydration — COP and compressor timing sensors automatically reconstruct history from HA Recorder on startup, eliminating data loss after restarts
• Separate thermal energy sensors for heating and cooling:
  • thermal_power_heating / thermal_power_cooling: Real-time power output
  • thermal_energy_heating_daily / thermal_energy_cooling_daily: Daily energy (resets at midnight)
  • thermal_energy_heating_total / thermal_energy_cooling_total: Total cumulative energy
• Post-cycle thermal inertia tracking — Thermal energy from system inertia correctly counted after compressor stops
• Automatic entity migration — Seamless upgrade from v1.9.x to 2.0.0 with preserved entity history and IDs
• Functional repair flow — Dedicated repairs.py for 1.9.x → 2.0.0 migration with automatic integration reload
• Hardware-based unique_id (#162) — Config entries use gateway hardware identifier (Modbus Input Registers 0-2) instead of IP+slave, preventing duplicates and surviving DHCP changes
• Annotated Modbus register scanner — New scripts/scan_gateway.py tool with make scan target for diagnosing register values across all gateway types, with human-readable annotations and scan reference documentation

Changed

• Minimum Home Assistant version raised to 2025.1.0 to align with WaterHeaterEntityDescription component signature
• Minimum Python version raised to 3.13
• CI tests against min and latest HA versions via matrix (HA 2025.1.0 and latest)
• Complete platform refactoring to domain-driven architecture — all platform files act as pure orchestrators
• Entity organization moved from technical grouping to business domain grouping
• Modbus register organization by logical device for improved clarity
• Alarm sensor displays descriptions as state with numeric codes as attributes
• Storage strategy — COP and compressor data relies on HA Recorder instead of custom storage
• Thermal service split into modular package: calculators.py, accumulator.py, service.py, constants.py
• Thermal energy classification uses operation mode (#196) — DHW and pool cycles now force heating classification regardless of ΔT sign, preventing transient negative deltas from being incorrectly counted as cooling energy
• Sensor subclasses extracted into dedicated package — entities/base/sensor.py split into entities/base/sensor/ package with specialized subclasses (COP, thermal, timing) for better maintainability
• Register map factory extracted into api/__init__.py, eliminating duplication
• ⚠️ BREAKING: Thermal energy calculation logic (#123):
  • Correctly separates heating (ΔT > 0) from cooling (ΔT < 0)
  • Defrost cycles are now filtered (not counted as energy production)
  • Post-cycle lock mechanism prevents counting noise after compressor stops
  • Results in accurate COP calculations (previously inflated by defrost)

Deprecated

• ⚠️ Old thermal energy sensors (disabled by default, still available for backward compatibility):
  • thermal_power → use thermal_power_heating instead
  • daily_thermal_energy → use thermal_energy_heating_daily instead
  • total_thermal_energy → use thermal_energy_heating_total instead
  • Migration required: Update your Energy Dashboard and automations to use the new sensors

Removed

• Legacy technical modules and monolithic entity files in favor of domain-specific builders
• Direct entity instantiation replaced with builder pattern
• Legacy services directory
• Redundant climate number entities (target_temp, current_temp) — now handled by climate entity

Fixed

• Anti-legionella temperature range (#178) — DHW anti-legionella target temperature now uses profile-based min/max instead of hardcoded values, respecting each model's actual capabilities
• COP DHW identical to COP Heating (#191) — COP sensors now use operation_state to differentiate heating, DHW, cooling, and pool cycles
• Anti-legionella binary sensor (#178) — Read from STATUS registers instead of CONTROL registers
• Cooling capability detection (#177) — Fixed system_config bitmask order regression from v1.9.x
• OTC cooling serialization for HC-A(16/64)MB — Correct mapping (Disabled=0, Points=1, Fix=2)
• Recorder database access warning — Use recorder executor for database operations
• Pressure sensor error handling — 0xFFFF sentinel check in both gateway register maps
• Config flow translations — Added missing translations for gateway/profile selection (EN and FR)
• Profile detection robustness — Yutampo R32 detect() no longer returns None when has_dhw is missing
• Temperature deserialization — Properly differentiates between tenths and signed 16-bit values
• Sensor reading accuracy for secondary compressor current and pressure sensors
• Unit power switch "Unknown" state due to inconsistent condition checks
• COP measurement period — Fixed negative time span values
• Legacy entities — Automatic migration with preserved history

[1.9.3] - 2025-10-06

Fixed

• Fixed aberrant COP (Coefficient of Performance) values by implementing comprehensive data validation and intelligent unit detection for power sensors
• Added robust validation for all input parameters: temperature ranges (-10°C to 80°C), water flow rates (0.1 to 10.0 m³/h), temperature differences (0.5 to 30 K), power ranges (0.1 to 50.0 kW thermal, 0.1 to 20.0 kW electrical), and final COP values (0.5 to 8.0)
• Implemented automatic power unit detection (W vs kW) using unit_of_measurement attribute with intelligent fallback detection based on value ranges
• Added validation for energy accumulation to prevent calculation errors in COP measurements
• Enhanced debug logging for unit detection, validation failures, and COP calculations

Changed

• Improved COP calculation accuracy by rejecting invalid data instead of producing incorrect values
• Enhanced support for external power and voltage sensors with automatic unit detection
• Updated power unit handling to seamlessly support both W and kW sensors
• Options flow: avoid providing default=None to entity selectors to prevent the UI error "Entity None is neither a valid entity ID nor a valid UUID" when opening Options. (#109)
• Options flow: stop storing the config_entry on the options flow instance to comply with Home Assistant deprecation and silence the warning that will become an error in 2025.12. (#109)
• CI: update GitHub Actions actions/setup-python to v6
• Dev tooling: bump ruff to 0.13.3

[1.9.2] - 2025-09-05

Fixed

• Fixed pymodbus compatibility issue with Home Assistant 2025.9.0+ by implementing automatic version detection for the device/slave parameter. The integration now works with both pymodbus < 3.10.0 (using slave parameter) and pymodbus >= 3.10.0 (using device_id parameter), ensuring compatibility across all Home Assistant versions. (#97)

[1.9.1] - 2025-07-22

Changed

• Improved error handling in the data update coordinator to consistently create a repair issue in Home Assistant for any Modbus or network communication error.

Fixed

• Resolved an issue where a loss of IP connectivity to the Modbus gateway could cause the integration to crash or behave unexpectedly. The integration now correctly handles network errors (OSError), ensuring that all entities become unavailable and properly recover once the connection is restored. (#76)

[1.9.0] - 2025-07-07

Added

• New sensor to monitor the gateway's synchronization state (Synchronized, Desynchronized, Initializing).
• Pre-flight check during setup and updates to verify gateway synchronization status. This creates a persistent notification ("Repair") if the gateway is desynchronized, guiding the user to resolve the issue.

Changed

• Improved startup resilience. The integration now caches the heat pump's configuration during the first successful setup. This ensures that all devices and entities are registered during subsequent Home Assistant startups, even if the heat pump is temporarily offline.

Fixed

• Resolved a critical issue where all integration entities would disappear if the heat pump was offline when Home Assistant started. Entities will now appear as unavailable until the connection is restored.

[1.8.2] - 2025-06-26

Fixed

• Corrected the HACS installation link in README.md to ensure it redirects correctly.

Changed

• Updated development dependencies, including ruff to v0.12.0.

[1.8.1] - 2025-05-12

Added

• New "Anti-legionella Cycle" button entity to manually start a high temperature anti-legionella treatment cycle.
• New binary sensor entity (antilegionella_cycle) indicating if an anti-legionella cycle is currently running.

Changed

• Removed unused or redundant Domestic Hot Water (DHW) entities: DHW current temperature sensor, DHW target temperature number, DHW power switch, high demand switch, and periodic anti-legionella switch.
• Improved English and French translations for new entities and advanced configuration (water inlet/outlet temperature entities).

[1.8.0] - 2025-05-11

Changed

• The integration now allows configuration with central control modes Air (1), Water (2), or Total (3). Only Local (0) is forbidden.
• Error messages and documentation updated to reflect this change.
• The documentation now recommends using Air (1) mode for most installations.
• Support for Hitachi Yutampo R32 machines (requires 'Total' (3) mode).
• Bump ruff from 0.11.2 to 0.11.8 (#50)
• Updated development dependencies and minor fixes.

[1.7.1] - 2025-03-27

Changed

• Replaced standard DHW preset with heat pump mode
• Migrated from Pylint to Ruff for code linting
• Updated development dependencies (Ruff to 0.11.2, pre-commit to 4.2.0)

Added

• Added ffmpeg dependency to development environment

[1.7.0] - 2025-03-19

Added

• Implemented WaterHeaterEntity for Domestic Hot Water (DHW) control
• Better integration with Home Assistant UI for water heater controls
• Support for standard operation modes: off, standard, and high demand

[1.6.1] - 2025-03-10

Fixed

• Fixed issue with multiple heat pumps not generating unique entity IDs
• Added config entry ID to all entity unique IDs to ensure uniqueness across multiple instances

[1.6.0] - 2025-02-06

Added

• New thermal energy monitoring sensors:
  • Real-time thermal power output (kW)
  • Daily thermal energy production with midnight auto-reset (kWh)
  • Total cumulative thermal energy production (kWh)
• Detailed monitoring attributes:
  • Temperature differential and water flow tracking
  • Average power calculation over measurement periods
  • Precise measurement timing with compressor state tracking
• Full translations for all new features in French and English

[1.5.2] - 2025-01-16

Changed

• Optimized default sensor visibility based on configuration and relevance for standard users

[1.5.1] - 2025-01-16

Fixed

• Compatibility with latest pymodbus API

[1.5.0] - 2025-01-16

Added

• Improved logging for COP calculation and system state monitoring

Changed

• Updated pymodbus dependency to match Home Assistant's version
• Optimized COP calculation parameters for better accuracy

[1.5.0-b7] - 2025-01-12

Added

• Added quality indicators for COP measurements (no_data, insufficient_data, preliminary, optimal)
• Added translations for COP quality indicators in French and English

Fixed

• Fixed sample size and interval for more accurate COP calculation

[1.5.0-b6] - 2025-01-06

Fixed

• Fixed COP calculation by applying water flow conversion (raw value was used instead of m³/h)

[1.5.0-b5] - 2025-01-03

Fixed

• Fixed COP calculation by removing incorrect water flow division
• Added more detailed debug logging for thermal power calculation

[1.5.0-b4] - 2025-01-02

Added

• Added runtime and rest time sensors for both compressors
• Added detailed logging for power calculations
• Added debug information for thermal power calculation
• Added comprehensive logging for COP measurements and accumulation

Changed

• Moved cycle time sensors to compressor devices for better organization
• Optimized COP calculation with more detailed debug information
• Simplified sensor code by moving value validation to conversion methods

Fixed

• Fixed temperature conversion for special values (0xFFFF)
• Fixed water flow value scaling
• Fixed double conversion issue for temperature and pressure sensors
• Fixed connectivity sensor state calculation

Added

• Added detailed logging for power calculations
• Added debug information for thermal power calculation
• Added comprehensive logging for COP measurements and accumulation

[1.5.0-b3] - 2024-12-19

Added

• Added external temperature entities configuration for more accurate COP calculations
• Added support for two COP calculation methods:
  • Moving median over 10 measurements when using external temperature sensors
  • Energy accumulation over 15 minutes when using internal sensors

Changed

• Modified configuration flow to include temperature entity selection
• Improved COP calculation accuracy with external temperature sensors
• Refactored sensor code to reduce complexity and improve maintainability

Documentation

• Updated configuration documentation with new temperature entity options
• Added explanation of COP calculation methods in the documentation

[1.5.0-b2] - 2024-12-18

Added

• Added power meter entity configuration option for more accurate COP calculations
• Added support for external power meter in sensor calculations

Changed

• Modified configuration flow to include power meter entity selection
• Updated COP calculations to use power meter readings when available
• Enhanced power consumption accuracy with direct power meter readings

Documentation

• Updated README with power meter configuration instructions
• Added power meter entity option in configuration documentation

[1.5.0-b1] - 2024-12-14

Added

• Added voltage entity configuration option for more accurate power calculations
• Introduced new configuration schemas for gateway, power supply and advanced settings
• Added support for custom voltage entity in sensor calculations

Changed

• Modified configuration flow to include voltage entity selection
• Updated power consumption calculations to use voltage entity when available
• Enhanced system configuration flexibility with new voltage setup options

[1.5.0-b0] - 2024-12-13

Added

• New COP (Coefficient of Performance) sensor with real-time calculation
• Power supply type configuration (single-phase/three-phase)
• Enhanced power calculations for S80 models with dual compressor support

Changed

• Improved power consumption calculations with smoothing algorithm
• Updated configuration options to include power supply type
• Enhanced accuracy of energy measurements

[1.4.2] - 2024-12-11

Changed

• Improved operation state sensor with more descriptive state values

[1.4.1] - 2024-12-11

Changed

• Downgraded pymodbus dependency to 3.6.9 to match Home Assistant's modbus integration

[1.4.0] - 2024-12-11

Added

• New diagnostic sensor "Operation State" showing detailed heat pump operation mode
• New diagnostic sensor "Compressor Cycle Time" measuring average time between compressor starts

Changed

• Updated French and English translations for new sensors

[1.3.4] - 2024-12-05

Changed

• Removed unnecessary dependency to Home Assistant's modbus integration since we only use pymodbus library

[1.3.3] - 2024-12-05

Fixed

• Changed temperature conversion to use integers instead of floats as documented by Hitachi
• Fixed Pylint warnings by implementing missing abstract methods in ClimateEntity

[1.3.2] - 2024-11-29

Fixed

• Fixed unique_id generation in switch and number entities to prevent mismatched entities

[1.3.1] - 2024-11-29

Fixed

• Fixed register key double prefixing issue in switch and number entities causing some controls to fail

[1.3.0] - 2024-11-29

Removed

• Removed climate entity for DHW control in favor of more appropriate water heater entity type

[1.2.0] - 2024-11-29

Added

• Added new compressor diagnostic sensors:
  • Gas Temperature (TG)
  • Liquid Temperature (TI)
  • Discharge Temperature (TD)
  • Evaporator Temperature (TE)
  • Indoor Expansion Valve Opening (EVI)
  • Outdoor Expansion Valve Opening (EVO)

[1.1.1] - 2024-11-29

Fixed

• Fixed alarm code descriptions not loading

[1.1.0] - 2024-11-28

Added

• Added detailed error descriptions for all alarm codes
• Improved alarm code sensor to display both code and description

[1.0.0] - 2024-11-05

Added

• Initial release of the Hitachi Yutaki integration
• Basic configuration flow with connection validation
• Multi-language support (English and French)
• Automatic model detection and feature discovery
• Support for Yutaki S, S Combi, S80, and M models
• Climate control features:
  • Power control per circuit
  • Operation mode selection (Heat/Cool/Auto)
  • Target temperature adjustment
  • Comfort/Eco presets
  • Outdoor Temperature Compensation (OTC)
• DHW (Domestic Hot Water) control:
  • Power control
  • Target temperature adjustment
  • Boost mode
  • Anti-legionella function
  • High demand mode
• Pool heating control (if configured)
• Monitoring features:
  • Temperature sensors (outdoor, water inlet/outlet, circuits, DHW)
  • Component status (compressors, pumps, heaters)
  • Compressor frequencies and currents
  • Power consumption
  • Alarm codes
• Advanced configuration options:
  • Circuit-specific settings
  • Thermostat configuration
  • OTC calculation methods
  • ECO mode offsets
• Special features for S80 model:
  • Secondary compressor monitoring
  • R134a circuit sensors

Changed

• N/A (Initial release)

Deprecated

• N/A (Initial release)

Removed

• N/A (Initial release)

Fixed

• N/A (Initial release)

Security

• Validation of Modbus connection parameters
• Proper error handling for Modbus communication