Toshiba HVAC
SMMS VRF with TCB-IFKNX1 Native KNX Adapter and Estia Heat Pump
Toshiba Air Conditioning (Fujisawa, Japan; EU operations via Carrier Global since 2017) manufactures the SMMS-e VRF range for European commercial buildings. The TCB-IFKNX1 native KNX adapter integrates each SMMS indoor unit directly into KNX — on/off, mode, setpoint, room temperature, fan speed, and fault code group objects, fully ETS6 programmable. Estia heat pump (R32, 4.5–16kW, SG Ready) also supports TCB-IFKNX1 integration.
Role in our panels
How we use Toshiba HVAC
SMMS-e VRF architecture: Toshiba SMMS-e outdoor units (R32, inverter, 8–56kW, up to 50 indoor units), indoor unit types: 4-way cassette (RAV-M), ducted (RAV-SP), wall-mount, ceiling concealed. TCC-Link bus: Toshiba proprietary 2-wire communication (similar to Panasonic M-NET) connecting indoor and outdoor units — each indoor has TCC-Link port for BMS adapter. TCB-IFKNX1 adapter: DIN-rail, 4 modules wide, 24V DC, plugs into indoor unit TCC-Link port, KNX TP connection. One TCB-IFKNX1 per indoor unit. TCB-IFKNX1 ETS6 configuration: ETS6 application downloaded from Toshiba partner portal. Parameters: TCC-Link address (0–63, must match indoor unit DIP switch), operation mode options, setpoint range 16–30°C, periodic status sending interval (60s default), fault code object enable. Group objects: On/Off (DPT 1.001), Mode (DPT 20.105: Auto/Heat/Cool/Fan/Dry), Setpoint (DPT 9.001), Room temperature feedback (DPT 9.001, read-only), Fan speed (DPT 5.001 0-100%), Fault status (DPT 1.001), Fault code (DPT 5.010). Standard ETS6 programming: link each object to functional GA structure (GA main group = 7, sub-group = room number). Estia heat pump integration: Toshiba Estia HWS-xxx (R32, 4.5/6/8/11/16kW, ErP A+++ certified, built-in DHW tank model available). TCB-IFKNX1 installs same way as VRF indoor unit. Additional Estia KNX objects: DHW temperature (DPT 9.001), DHW mode (DPT 1.001), defrost active (DPT 1.001). SG Ready: Estia PCB has SG Ready dry-contact input — connect KNX binary output relay for PV surplus activation (same S1/S2 state logic as Vaillant/Nibe). Comparison with Panasonic and LG: Toshiba TCB-IFKNX1 (native KNX, 1 adapter/unit) vs Panasonic CZ-CAPRA1 (native KNX, 1 adapter/unit) — nearly identical integration approach. Toshiba SMMS-e and Panasonic PAC-i both use similar 2-wire TCC-Link/M-NET buses. LG LGAP requires external Modbus gateway (more complex). Choose VRF brand based on specification, local distributor support, and price — KNX integration effort is equivalent for Toshiba and Panasonic.
Native KNX TP integration via TCB-IFKNX1 adapter — one adapter per SMMS indoor unit, full ETS6 application, group objects for all control and status parameters. No external Modbus gateway required.
Used in these project types
Toshiba HVAC products
Key components we install
TCB-IFKNX1 KNX Interface Adapter
Native KNX TP adapter for Toshiba SMMS-e and SMMS-i VRF indoor units. DIN-rail mount, 4 modules wide, 24V DC powered. Connects via TCC-Link 2-wire bus to indoor unit — one adapter per indoor unit. ETS6 application (downloaded from Toshiba partner portal) provides group objects for all control and status parameters. No external Modbus gateway required.
RAV-M1104KRTP-E Cassette Indoor Unit
4-way cassette VRF indoor unit, 10kW cooling/heating, R32, recessed ceiling mount. TCC-Link port for TCB-IFKNX1 KNX adapter connection. DIP switch address (0–63) must match TCB-IFKNX1 ETS6 parameter. Available with auto-clean panel. Used in commercial offices, hotel rooms, and retail where concealed ceiling installation is required.
SMMS-e MMY-MAP2006HT8-E Outdoor Unit
SMMS-e inverter VRF outdoor unit, 20kW cooling/heating, R32 refrigerant, modular design (multiple units combinable to 56kW). Connects up to 24 indoor units via TCC-Link bus. Each indoor unit individually addressable — each with its own TCB-IFKNX1 KNX adapter on the same KNX TP line.
Estia HWS-804XWHM3-E Heat Pump
Monobloc air-source heat pump, 8kW (A7/W35), R32, ErP A+++ rated. Integrates with KNX via TCB-IFKNX1 adapter — same installation method as VRF indoor unit. Additional KNX objects: DHW temperature setpoint, DHW mode, defrost active status. SG Ready dry-contact input for KNX PV surplus control alongside TCB-IFKNX1.
BMS-CT1280TLE Central Controller
Toshiba standalone BMS controller for managing up to 128 indoor units with schedule, group, and energy reporting. No native KNX bus output — used as an alternative to TCB-IFKNX1 adapters where a Toshiba-centric BMS is preferred over KNX integration. Not required when TCB-IFKNX1 adapters are fitted.
Toshiba HVAC FAQ
How many TCB-IFKNX1 adapters for a 30-indoor-unit system?
One per indoor unit = 30 adapters. All 30 can be on the same KNX TP line if within line device limit (64 max without repeater). For large systems: evaluate Toshiba TCC-MODBUS gateway (interfaces multiple indoor units via one Modbus TCP gateway) as a lower hardware cost alternative to individual TCB-IFKNX1 per unit.
Does TCB-IFKNX1 work with both SMMS-e and older SMMS systems?
TCB-IFKNX1 is compatible with Toshiba SMMS-e and SMMS-i series (check compatibility list on Toshiba partner portal). Not compatible with older VRF systems using different TCC-Link protocol version. Verify indoor unit model compatibility before ordering adapters.
Can Toshiba Estia be controlled via both TCB-IFKNX1 and SG Ready simultaneously?
Yes — SG Ready dry-contact input and TCB-IFKNX1 KNX adapter operate independently. SG Ready sets operating mode (comfort/eco/max), TCB-IFKNX1 provides setpoint and on/off control. Both can be active simultaneously without conflict.
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